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Chapter 17. Sweet Corn Production

Katia Viana Xavier, Ramdas Kanissery, Craig Frey, Anna Mészáros, Nicholas S. Dufault, Johan Desaeger, Jawwad Qureshi, andJulien M. Beuzelin

Botany and Planting

Sweet corn— Zea mays var. rugosa, Poaceae (Gramineae).

Table 1. Planting dates for sweet corn.

Planting Region

Dates

North Florida

Feb–Apr

Central Florida

Jan–Apr

South Florida

Sep–Mar

Table 2. Planting information for sweet corn.

Planting Parameters

Measurements

Distance between rows (in)

28–36

Distance between plants (in)

6–8

Seeding depth (in)

1.0–1.5

Seed per acre (lb)

6–15

Days to maturity from seed

64–90

Plant population (acre)

24,000–32,000

Cultivars

Table 3. Description of major sweet corn cultivars currently available.

Type

Genes Controlling Sweetness

Storage Life (Days)

Relative Sugar Content

Sugary

Full complement of sugary

1–3

Normal

Sugary Enhanced, also “Modified” and “EH”

Full complement of sugary (su) and half or full complement of sugary enhancer (se)

3–5

Slight to moderate or even high levels

Supersweet, also “Ultra,” “Extra” sweet

No sugary (su); full complement of shrunken-2 (sh2)

5–10

High

Synergistic, also “Sweet-Gene Hybrid”

Full complement of sugary (su) and half complement of shrunken-2 (sh2)

3–5

Moderate

Improved Supersweet

Half complement of sugary (su) and full complement of shrunken-2 (sh2)

5–10

Very high

ADX

No sugary (su) or shrunken-2 (sh2) genes; full complement of ae, du, and wx genes.

5–10

Moderate to high

Table 4. Supersweet (shrunken-2) sweet corn cultivars arranged by kernel color.

Corn

Cultivars

Yellow

Accentuate, Alliance, Astronaut, Gallant MXR, GSS 1170, Hercules, Passion, Primetime, Seminole Gold, SV 1077, SV 1446

White

Coronado, Devotion, Glacial, Platinum XR, 3174 XTH, 3380 XTH

Bicolor

Affection, Awesome XR, Battalion, BSS 1075, Coastal, Courage MXR, Honor XR, Obsession, Salute XR, Seminole Sweet, Starship, 7143

The following tables list registered pesticides that should be integrated with other pest management methods. Additional information on integrated management methods can be requested from UF/IFAS Extension horticulture or agriculture agents. A list of local UF/IFAS Extension county offices is available at https://sfyl.ifas.ufl.edu/find-your-local-office/.

Table 5. Herbicides approved for managing weeds in sweet corn. Labels change frequently. Be sure to read a current product label before applying any chemical. Contact: Ramdas Kanissery, UF/IFAS Southwest Florida Research and Education Center.

 

Active Ingredient lb a.i./Acre

Trade Name Product/Acre

MOA Code

Weeds Controlled/Remarks

PREEMERGENCE

Atrazine

Mineral Soil 1.0–2.0

Muck Soil 2.0–3.0

(AAtrex) 4 L

Mineral: 2–4 pt

Muck: 4–6 pt

(AAtrex Nine-0) 90 WDG

Mineral: 1.1–2.2 lb

Muck: 2.2–3.3 lb

5

Germinating broadleaf and grass weeds. Apply to moist soil. No more than 2.5 lb a.i./A per calendar year. Consult labels for plant-back restrictions on rotational crops.

Carfentrazone

up to 0.031

(Aim) 2 EC

up to 2 fl oz

14

Apply as a preplant burndown for emerged broadleaf weeds. Use crop oil concentrate, methylated seed oil, or nonionic surfactant at recommended rates. No more than 0.096 lb a.i./A per season. No pretransplant interval.

Dimethenamid-P

0.56–0.84

(Outlook) 6 EC

12–18 fl oz

15

Annual broadleaf and grass weeds. After application, incorporate into soil by rainfall, sprinkler irrigation, or mechanical tillage. Consult label for rate based on soil texture.

EPTC

4.0–6.0

(Eradicane) 6.7 E

4.75–7.33 pt

8

Annual broadleaf, grass weeds, and nutsedge. Use lower rates on lighter soils (sand). Control of perennial weeds such as bermudagrass or nutsedge is increased through incorporation.

Flufenacet

0.49–0.68

(Define DF) 60 DF

13–18 oz

(Define SC) 4 SC

15–19 fl oz

15

Annual broadleaf and grass weeds. Rainfall, irrigation, or light cultivation is required within 7–10 days of application. Consult label for rate based on soil texture.

Glyphosate

(various formulations)

consult labels

9

Emerged broadleaf and grass weeds. Apply as a preplant burndown. Tank-mix with a residual herbicide to broaden spectrum of weed control. Consult label for individual product directions.

Mesotrione

0.188–0.24

(Callisto) 4 SC

6.0–7.7 fl oz

28

Annual broadleaf weeds. Tank-mix with a preemergence grass herbicide for grass control. No more than 7.7 fl oz/A per season.

Paraquat

0.5–1.0

(Gramoxone) 2 SL

2.0–4.0 pt

(Gramoxone) 3 SL

1.3–2.7 pt

(Firestorm) 3 SL

1.3–2.7 pt

22

Emerged broadleaf and grass weeds. Apply as a preplant burndown. No more than 3 applications per year. Tank-mix with a residual preemergence herbicide to broaden the spectrum of weed control. Consult label for new restrictions.

Pelargonic acid

(Scythe) 4.2 EC

3%–10% v/v

27

Emerged broadleaf and grass weeds. Apply as a preplant burndown treatment. Product is a contact, nonselective, foliar-applied herbicide with no residual control. May be tank-mixed with soil residual compounds.

Pendimethalin

Mineral Soil 0.75–1.0

Muck Soil 1.0–2.0

(Acumen, Prowl) 3.3 EC

Mineral: 1.8–2.4 pt

Muck: 2.4–4.8 pt

(Prowl H20) 3.8

Mineral: 2.0–3.0 pt

Muck: 2.0–4.0 pt

3

Broadleaf and grass weeds. Overhead irrigation or rainfall is required within 7 days of application.

Pyraflufen ethyl

0.001–0.003

(ET Herbicide) 0.208 EC

0.5–2.0 fl oz

14

Emerged broadleaf weeds. Apply as a preplant burndown treatment.

Simazine

2.0

(Princep, Simazine) 4 L

2.0 qt

(Princep, Simazine) 90 WDG

2.2 lb

5

Broadleaf and grass weeds. If a second application is required, do not exceed 2.5 lb a.i./A per calendar year. Simazine 4 L and Simazine 90 DF can be applied to muck soils at 2.5 lb a.i./A. PHI 45 days.

S-metolachlor

1.0–1.6

(Brawl, Dual Magnum) 7.62 EC

1.0–1.67 pt

(Cinch, Dual II Magnum) 7.64 EC

1.0–1.67 pt

15

Annual broadleaf and grass weeds. Use a lower rate on lighter soils. Weed control is increased with 0.5–1 in. of rainfall or irrigation. No more than 3.9 pt/A per crop year depending on soil texture.

POSTEMERGENCE

Atrazine

Mineral Soil 1.0–2.0

Muck Soil 2.0–3.0

(AAtrex) 4 L

Mineral: 2–4 pt

Muck: 4–6 pt

(AAtrex Nine-0) 90 WDG

Mineral: 1.1–2.2 lb

Muck: 2.2–3.3 lb

5

Broadleaf and some grass weeds. Apply before weeds exceed 1.5 in. tall and before corn exceeds 12 in. tall. No more than 2.5 lb a.i./A per calendar year. Consult label for plant-back restrictions on rotational crops.

Bentazon

0.75–1.0

(Basagran) 4 L

1.5–2.0 pt

(Basagran) 5 L

1.2–1.6 pt

6

Certain broadleaf and sedge weeds. Consult label for weeds controlled/weed size table. No more than 4 pt/A per season.

Carfentrazone

0.008–0.016

(Aim) 2 EC

0.5–1.0 fl oz

14

Emerged broadleaf weeds. Apply up to the 14-leaf stage of corn growth. After the V8 stage of growth, apply as a directed application. No more than 2.0 fl oz/A per season including preplant burndown and crop application. PHI 3 days.

Halosulfuron

0.03–0.05

(Sandea) 75 DF

0.6–1.0 oz

2

Broadleaf weeds and nutsedge. Apply over the top or with drop nozzles from the spike stage through the layby stage of corn. A sequential application of 0.66 oz/A may be made using drop nozzles to avoid spraying into the plant whorl. No more than 2 applications per year.

Mesotrione

0.094

(Callisto) 4 SC

3 fl oz

28

Broadleaf weeds. Treat up to 30 in. tall or up to the 8-leaf stage. Include a crop oil concentrate or nonionic surfactant in the spray solution. Slight leaf bleaching may occur. No more than 7.7 fl oz/A per season.

Nicosulfuron

0.03–0.06

(Accent) 75 WDG

0.6–1.3 oz

(Accent Q) 54.5 WDG

0.9–1.8 oz

2

Broadleaf and grass weeds. Sensitivity to sweet corn varieties is variable. Do not apply to ‘Merit’ sweet corn. Do not apply to corn that has previously been treated with Counter or Thimet insecticides because this may result in injury. Consult label for acceptable insecticides. Apply as broadcast to corn plants less than 12 in. tall. Use drop nozzles to direct the spray to corn plants that are 12–18 in. tall.

Pendimethalin

Mineral Soil 0.7–1.0

Muck Soil 1.0–2.0

(Acumen, Prowl) 3.3 EC

Mineral: 1.8–2.4 pt

Muck: 2.4–4.8 pt

(Prowl H20) 3.8

Mineral: 2.0–3.0 pt

Muck: 2.0–4.0 pt

3

Broadleaf and grass weeds. Apply after 4 in. tall until corn is 20–24 in. tall or the V8 growth stage. Direct the spray to the base of the plants.

S-metolachlor

up to 1.9

(Brawl, Dual Magnum) 7.62 EC

up to 2.0 pt

(Cinch, Dual II Magnum) 7.64 EC

up to 2.0 pt

15

Annual broadleaf and grass weeds. Apply after crop emergence up to 40 in. tall. Direct spray to the base of the plants when plants are taller than 5 in. Use a lower rate on lighter soils. Weed control is increased with 0.5–1 in. of rainfall or irrigation. No more than 3.9 pt/A per crop year depending on soil texture. PHI 30 days.

Tembotrione

0.08

(Laudis) 3.5 EC

3 fl oz

27

Annual broadleaf and grass weeds. Crop tolerance is dependent on variety, so apply to a small area if tolerance is unknown. Do not use it on ‘Merit’ or ‘Shogun’. May be applied from corn emergence through the V7 stage of growth. No more than 3 fl oz/A per season.

Topramezone

0.020–0.022

(Armezon, Impact) 2.8

0.75–1.0 fl oz

27

Broadleaf and grass weeds. Consult label for maximum size of certain weed species for control. PHI 45 days.

Table 6. Insecticides labeled for management of arthropod pests of sweet corn. Labels change frequently. Be sure to read a current product label before applying any chemical. Please refer to chapter 19 for information on biopesticides, including materials labeled for certified organic production. Contact: Julien Beuzelin, UF/IFAS Everglades Research and Education Center.

Insect or Mite Pest

MOA Code1

Trade Name (Active Ingredient)

Max Rate/Acre

REI (Hours)

Days to Harvest

Remarks3

Appl.

Season2

Aphids

1A

*Lannate LV

*Lannate SP

(methomyl)

LV: 0.75–1.5 pt

SP: 0.25–0.50 lb

LV: 21 pt

SP: 7 lb

48

Ears: 0

Forage: 3

Stover: 21

Certain hybrid varieties are susceptible to methomyl injury. Treat a small area to determine safety first.

1B

Fyfanon 57% EC

(malathion)

1.5 pt

–

12

5

No more than 2 applications per year. Crop injury may occur in the whorl to silking stages.

3A

*Asana XL Insecticide

(esfenvalerate)

5.8–9.6 fl oz

96 fl oz

12

1

–

3A

*Brigade 2EC Insecticide/Miticide

(bifenthrin)

2.1–6.4 fl oz

12.8 fl oz

12

1

Many other brands available with same active ingredient.

3A

*Capture LFR

(bifenthrin)

At plant: 3.4–17.0 fl oz

 

17.0 fl oz

12

At planting

For mixing with liquid fertilizer.

3A

*Delta Gold

(deltamethrin)

1.5–2.4 fl oz

38.4 fl oz

12

Ears and forage: 1

Stover: 21

–

3A

*Fastac CS

(alpha-cypermethrin)

2.8–3.8 fl oz

11.4 fl oz

12

3

–

3A

*Hero Insecticide

(bifenthrin + zeta- cypermethrin)

4.0–10.3 fl oz

27.39 fl oz

12

3

See label when using more than 1 product containing bifenthrin or zeta-cypermethrin.

3A

*Mustang Maxx

(zeta-cypermethrin)

2.8–4.0 fl oz

24 fl oz

12

3

–

3A

*Warrior II

(lambda-cyhalothrin)

1.28–1.92 fl oz

30.72 fl oz

24

Ears (foliar):1

For feeding livestock or at-plant applications: 21

Many other brands with same active ingredient available.

3A + 4C

Ridgeback

(bifenthrin + sulfoxaflor)

4.5–13.8 fl oz

27.6 fl oz per year

24

7

–

3A + 28

*Besiege

(lambda-cyhalothrin + chlorantraniliprole)

6–10 fl oz

31 fl oz per year

24

1

–

3A + 28

*Elevest

(bifenthrin + chlorantraniliprole)

4.8–9.6 fl oz

–

12

1

No more than 2 applications per year.

4A

Assail 30 SG

Assail 70 WP

(acetamiprid)

30 SG: 2.1–2.9 oz

70 WP: 0.9–1.2 oz

30 SG: 11.2 oz per year

70 WP: 4.8 oz per year

12

1

Other brands available with same active ingredient.

4A + 15

Cormoran

(acetamiprid + novaluron)

9–12 fl oz

40 fl oz

12

7

–

4C

Transform WG

(sulfoxaflor)

0.75–1.5 oz

3.0 oz per year

24

7

–

4D

Sivanto Prime

(flupyradifurone)

7.0–14.0 fl oz

28 fl oz per year

4

Ears and forage: 7

Stover: 21

–

Beetles

(includes banded cucumber beetle, flea beetles, sap beetles, seed corn beetle)

1A

*Lannate LV

*Lannate SP

(methomyl)

LV: 0.75–1.5 pt

SP: 0.25–0.50 lb

LV: 21 pt

SP: 7 lb

48

Ears: 0

Forage: 3

Stover: 21

Certain hybrid varieties are susceptible to methomyl injury. Treat a small area to determine safety first.

1A

Sevin 4F

Sevin XLR Plus

(carbaryl)

1–2 qt

16 qt per year

24 (21 days for detasseling workers)

Ears: 2

Forage: 14

Fodder: 48

–

1B

*Counter 15G Lock 'N Load

(terbufos)

Banded or in furrow: 6.0–8.0 oz/1000 row ft

Postemergence incorporated: 8 oz/1000 row ft at cultivation

–

48

60

No more than 1 application.

1B

Fyfanon 57% EC

Fyfanon ULV AG

(malathion)

57% EC: 1.5 pt

ULV AG: 4–8 fl oz

–

12

5

No more than 2 applications per year. Crop injury may occur in the whorl to silking stages.

1B

*Thimet 20-G

(phorate)

4.5–6.0 oz/1000 row ft

–

48

At planting

No more than 1 application.

3A

*Asana XL Insecticide

(esfenvalerate)

5.8–9.6 fl oz

96 fl oz

12

1

–

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

28 fl oz

12

0

–

3A

*Brigade 2EC Insecticide/Miticide

(bifenthrin)

2.1–6.4 fl oz

12.8 fl oz

12

1

Many other brands available with same active ingredient.

3A

*Capture LFR

(bifenthrin)

Preplant incorporated: 4.0–5.3 fl oz

At plant: 3.4–17.0 fl oz

Preemergence: 3.4 fl oz

17.0 fl oz

12

Preplant incorporated, at planting, preemergence application

For mixing with liquid fertilizer.

3A

*Delta Gold

(deltamethrin)

1.0–2.4 fl oz

38.4 fl oz

12

Ears and forage: 1

Stover: 21

–

3A

*Fastac CS

(alpha-cypermethrin)

2.2–3.8 fl oz

11.4 fl oz

12

3

–

3A

*Force 3G

(tefluthrin)

4-5 oz/1000 row ft

–

48

At planting or cultivation within 30 days of seedling emergence

No more than 1 application.

3A

*Hero Insecticide

(bifenthrin + zeta-cypermethrin)

4.0–10.3 fl oz

27.39 fl oz

12

3

–

3A

*Mustang Maxx

(zeta-cypermethrin)

2.24–4.0 fl oz

24 fl oz

12

3

–

3A

*Warrior II

(lambda-cyhalothrin)

At plant: 0.33 fl oz/1000 row ft

Foliar: 1.28–1.92 fl oz

30.72 fl oz

24

Ears (foliar): 1

Feeding livestock or at-plant applications: 21

Many other brands available with same active ingredient.

3A + 4C

Ridgeback

(bifenthrin + sulfoxaflor)

4.5–13.8 fl oz

27.6 fl oz per year

24

7

–

3A + 28

*Besiege

(lambda-cyhalothrin + chlorantraniliprole)

6–10 fl oz

31 fl oz per year

24

1

–

3A + 28

*Elevest

(bifenthrin + chlorantraniliprole)

4.8–9.6 fl oz

–

12

1

No more than 2 applications per year.

4A

Assail 30 SG

Assail 70 WP

(acetamiprid)

30 SG: 4.0–5.3 oz

70 WP: 1.7–2.3 oz

30 SG: 11.2 oz per year

70 WP: 4.8 oz per year

12

7

Other brands available with same active ingredient.

4A + 15

Cormoran

(acetamiprid + novaluron)

9–12 fl oz

40 fl oz

12

7

–

15

Rimon 0.83EC

(novaluron)

6–12 fl oz

60 fl oz

12

1

–

Caterpillars

(includes beet armyworm, corn borer, corn earworm, cutworms, fall armyworm, webworms)

1A

*Lannate LV

*Lannate SP

(methomyl)

LV: 0.75–1.5 pt

SP: 0.25–0.50 lb

LV: 21 pt

SP: 7 lb

48

Ears: 0

Forage: 3

Stover: 21

Certain hybrid varieties are susceptible to methomyl injury. Treat a small area to determine safety first.

1A

*Methomyl 5G

(methomyl)

1.5–3.0 lb

30 lb

48

Forage: 3

Ears: 21

For corn earworm and fall armyworm control. Apply as a banded application, directing granules to the whorl of the plants. Apply from the 4th leaf stage until tasseling.

1A

Sevin 4F

Sevin XLR Plus

(carbaryl)

1–2 qt

16 qt per year

24 (21 days for detasseling workers)

Ears: 2

Forage: 14

Fodder: 48

–

1B

*Counter 15G Lock ‘n Load

(terbufos)

Banded or in furrow: 6.0–8.0 oz/1000 row ft

Postemergence incorporated: 8 oz/1000 row ft at cultivation

–

48

60

No more than 1 application.

1B

Fyfanon 57% EC

(malathion)

1.5 pt

–

12

5

No more than 2 applications per year. Crop injury may occur in the whorl to silking stages.

1B

*Mocap 15G

(ethoprop)

Broadcast: 20 lb

–

48

At planting

No more than 1 application, spread out over 3 days before planting and at planting.

3A

*Asana XL Insecticide

(esfenvalerate)

5.8–9.6 fl oz

96 fl oz

12

1

–

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

28 fl oz

12

0

–

3A

*Brigade 2EC Insecticide/Miticide

(bifenthrin)

In-furrow T-band at plant: 0.15–0.30 fl oz/1000 row ft

Foliar: 2.1–6.4 fl oz

12.8 fl oz

12

1

Many other brands available with same active ingredient.

3A

*Capture LFR

(bifenthrin)

Preplant incorporated: 4.0–5.3 fl oz

At plant: 3.4–17.0 fl oz

Preemergence: 3.4 fl oz

17.0 fl oz

12

Preplant incorporated, at planting, preemergence application

For mixing with liquid fertilizer.

3A

*Delta Gold

(deltamethrin)

1.0–2.4 fl oz

38.4 fl oz

12

Ears and forage: 1

Stover: 21

–

3A

*Fastac CS

(alpha-cypermethrin)

2.2–3.8 fl oz

11.4 fl oz

12

3

–

3A

*Force 3G

(tefluthrin)

3–4 oz/1000 row ft

–

48

At planting

No more than 1 application.

3A

*Hero Insecticide

(bifenthrin + zeta-cypermethrin)

4.0–10.3 fl oz

27.39 fl oz

12

3

–

3A

*Mustang Maxx

(zeta-cypermethrin)

2.24–4.0 fl oz

24 fl oz

12

3

–

3A

*Warrior II

(lambda-cyhalothrin)

At plant: 0.33 fl oz/1000 row ft

Foliar: 1.28–1.92 fl oz

30.72 fl oz

24

Ears (foliar): 1

Feeding livestock or at-plant applications: 21

Many other brands with same active ingredient available.

3A + 4C

Ridgeback

(bifenthrin + sulfoxaflor)

4.5–13.8 fl oz

27.6 fl oz per year

24

7

–

3A + 28

*Besiege

(lambda-cyhalothrin + chlorantraniliprole)

6–10 fl oz

31 fl oz per year

24

1

–

3A + 28

*Elevest

(bifenthrin + chlorantraniliprole)

4.8–9.6 fl oz

–

12

1

No more than 2 applications per year.

4A + 15

Cormoran

(acetamiprid + novaluron)

9–12 fl oz

40 fl oz

12

7

–

5

Radiant SC

(spinetoram)

3–6 fl oz

36 fl oz per year

4

Ears: 1

Forage or fodder: 3

–

5 + 18

Intrepid Edge

(spinetoram + methoxyfenozide)

4–12 fl oz

51 fl oz per year

4

Ears and fodder: 3

Dry fodder: 21

–

15

Rimon 0.83EC

(novaluron)

6–12 fl oz

60 fl oz

12

1

–

18

Intrepid 2F

(methoxyfenozide)

4–16 fl oz

64 fl oz per year

4

Ears and forage: 3

Dry fodder: 21

Other brands available with same active ingredient.

22

Avaunt

Avaunt eVo

(indoxacarb)

2.5–3.5 oz

14 oz

12 (14 days for hand harvesting)

Ears: 3

Fodder and stover: 35

Whorl stage through tassel push applications only.

28

Coragen

(chlorantraniliprole)

3.5–7.5 fl oz

15.4 fl oz per year

4

1

–

28

Vantacor

(chlorantraniliprole)

In-furrow at plant: 1.7–2.5 fl oz

Foliar: 1.2–2.5 fl oz

5.1 fl oz per year

4

1

Can be applied by overhead sprinkler chemigation system.

32

Spear-Lep

(GS-omega/kappa-Hxtx-Hv1a)

1–2 pt

10 gal per year

4

0

Must be tank-mixed with a Bacillus thurigiensis (Bt) product.

Chinch bugs

1A

Sevin 4F

Sevin XLR Plus

(carbaryl)

1–2 qt

16 qt per year

24 (21 days for detasseling workers)

Ears: 2

Forage: 14

Fodder: 48

–

1B

*Counter 15G Lock ‘n Load

(terbufos)

Banded or in furrow: 6.0–8.0 oz/1000 row ft

Postemergence incorporated: 8 oz/1000 row ft at cultivation

–

48

60

No more than 1 application.

3A

*Asana XL Insecticide

(esfenvalerate)

5.8–9.6 fl oz

96 fl oz

12

1

–

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

28 fl oz

12

0

–

3A

*Brigade 2EC Insecticide/Miticide

(bifenthrin)

2.1–6.4 fl oz

12.8 fl oz

12

1

Many other brands available with same active ingredient.

3A

*Delta Gold

(deltamethrin)

1.5–2.4 fl oz

38.4 fl oz

12

Ears and forage: 1

Stover: 21

–

3A

*Fastac CS

(alpha-cypermethrin)

2.2–3.8 fl oz

11.4 fl oz

12

3

–

3A

*Force 3G

(tefluthrin)

4–5 oz/1000 row ft

–

48

At planting or cultivation within 30 days of seedling emergence

No more than 1 application.

3A

*Hero Insecticide

(bifenthrin + zeta-cypermethrin)

4.0–10.3 fl oz

27.39 fl oz

12

3

–

3A

*Mustang Maxx

(zeta-cypermethrin)

2.24–4.0 fl oz

24 fl oz

12

3

–

3A

*Warrior II

(lambda-cyhalothrin)

1.28–1.92 fl oz

30.72 fl oz

24

Ears: 1

Feeding livestock: 21

–

3A + 4C

Ridgeback

(bifenthrin + sulfoxaflor)

4.5–13.8 fl oz

27.6 fl oz per year

24

7

–

3A + 28

*Besiege

(lambda-cyhalothrin + chlorantraniliprole)

6–10 fl oz

31 fl oz per year

24

1

–

3A + 28

*Elevest

(bifenthrin + chlorantraniliprole)

4.8–9.6 fl oz

–

12

1

No more than 2 applications per year.

Corn silk flies

1B

Fyfanon ULV AG

(malathion)

6–8 fl oz

–

12

5

No more than 2 applications per year.

3A

*Asana XL Insecticide

(esfenvalerate)

9.6 fl oz

96 fl oz

12

1

–

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

28 fl oz

12

0

–

3A

*Fastac CS

(alpha-cypermethrin)

2.8–3.8 fl oz

11.4 fl oz

12

3

–

3A

*Hero Insecticide

(bifenthrin + zeta-cypermethrin)

4.0–10.3 fl oz

27.39 fl oz

12

3

–

3A

*Mustang Maxx

(zeta-cypermethrin)

2.24–4.0 fl oz

24 fl oz

12

3

–

3A

*Warrior II

(lambda-cyhalothrin)

1.92 fl oz

30.72 fl oz

24

Ears: 1

Feeding livestock: 21

–

3A + 4C

Ridgeback

(bifenthrin + sulfoxaflor)

4.5–13.8 fl oz

27.6 fl oz per year

24

7

–

3A + 28

*Besiege

(lambda-cyhalothrin + chlorantraniliprole)

10 fl oz

31 fl oz per year

24

1

–

4A

Assail 30 SG

Assail 70 WP

(acetamiprid)

30 SG: 5.3 oz

70 WP: 2.3 oz

30 SG: 11.2 oz per year

70 WP: 4.8 oz per year

12

7

Other brands available with same active ingredient.

4A + 15

Cormoran

(acetamiprid + novaluron)

12 fl oz

40 fl oz

12

7

–

Grasshoppers

1B

Fyfanon 57% EC

Fyfanon ULV AG

(malathion)

57% EC: 1.5 pt

ULV AG: 8 fl oz

–

12

5

No more than 2 applications per year. Crop injury may occur in the whorl to silking stages.

3A

*Asana XL Insecticide

(esfenvalerate)

5.8–9.6 fl oz

96 fl oz

12

1

–

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

28 fl oz

12

0

–

3A

*Brigade 2EC Insecticide/Miticide

(bifenthrin)

2.1–6.4 fl oz

12.8 fl oz

12

1

Many other brands available with same active ingredient.

3A

*Delta Gold

(deltamethrin)

1.0–1.5 fl oz

38.4 fl oz

12

Ears and forage: 1

Stover: 21

–

3A

*Fastac CS

(alpha-cypermethrin)

2.8–3.8 fl oz

11.4 fl oz

12

3

–

3A

*Hero Insecticide

(bifenthrin + zeta-cypermethrin)

4.0–10.3 fl oz

27.39 fl oz

12

3

–

3A

*Mustang Maxx

(zeta-cypermethrin)

2.8–4.0 fl oz

24 fl oz

12

3

–

3A

*Warrior II

(lambda-cyhalothrin)

1.28–1.92 fl oz

30.72 fl oz

24

Ears: 1

Feeding livestock: 21

–

3A + 4C

Ridgeback

(bifenthrin + sulfoxaflor)

4.5–13.8 fl oz

27.6 fl oz per year

24

7

–

3A + 28

*Besiege

(lambda-cyhalothrin + chlorantraniliprole)

6–10 fl oz

31 fl oz per year

24

1

–

3A + 28

*Elevest

(bifenthrin + chlorantraniliprole)

4.8–9.6 fl oz

–

12

1

No more than 2 applications per year.

4A + 15

Cormoran

(acetamiprid + novaluron)

9–12 fl oz

40 fl oz

12

7

–

15

Rimon 0.83EC

(novaluron)

6–12 fl oz

60 fl oz

12

1

–

28

Coragen

(chlorantraniliprole)

2.0–5.0 fl oz

15.4 fl oz per year

4

1

–

28

Vantacor

(chlorantraniliprole)

1.2–2.5 fl oz

5.1 fl oz per year

4

1

Foliar only. Can be applied by overhead sprinkler chemigation system.

Leafhoppers

1A

Sevin 4F

Sevin XLR Plus

(carbaryl)

1–2 qt

16 qt per year

24 (21 days for detasseling workers)

Ears: 2

Forage: 14

Fodder: 48

–

1B

Fyfanon 57% EC

(malathion)

1.5 pt

–

12

5

No more than 2 applications per year. Crop injury may occur in the whorl to silking stages.

3A

*Fastac CS

(alpha-cypermethrin)

2.2–3.8 fl oz

11.4 fl oz

12

3

–

3A

*Hero Insecticide

(bifenthrin + zeta-cypermethrin)

4.0–10.3 fl oz

27.39 fl oz

12

3

–

3A

*Mustang Maxx

(zeta-cypermethrin)

2.24–4.0 fl oz

24 fl oz

12

3

–

3A

*Warrior II

(lambda-cyhalothrin)

1.28–1.92 fl oz

30.72 fl oz

24

Ears: 1

Feeding livestock: 21

Many other brands with same active ingredient available.

3A + 4C

Ridgeback

(bifenthrin + sulfoxaflor)

4.5–13.8 fl oz

27.6 fl oz per year

24

7

–

3A + 28

*Besiege

(lambda-cyhalothrin + chlorantraniliprole)

6–10 fl oz

31 fl oz per year

24

1

–

4D

Sivanto Prime

(flupyradifurone)

7.0–14.0 fl oz

28 fl oz per year

4

Ear and forage: 7

Stover: 21

–

Soil pests

(includes corn rootworms, seed corn maggot, white grubs, wireworms)

1A

*Lannate LV

*Lannate SP

(methomyl)

LV: 0.75–1.5 pt

SP: 0.25–0.50 lb

LV: 21 pt

SP: 7 lb

48

Ears: 0

Forage: 3

Stover: 21

Certain hybrid varieties are susceptible to methomyl injury. Treat a small area to determine safety first.

1A

Sevin 4F

Sevin XLR Plus

(carbaryl)

1–2 qt

16 qt per year

24 (21 days for detasseling workers)

Ears: 2

Forage: 14

Fodder: 48

–

1B

*Counter 15G Lock ‘n Load

(terbufos)

Banded or in furrow: 6.0–8.0 oz/1000 row ft

Postemergence incorporated: 8 oz/1000 row ft at cultivation

–

48

60

No more than 1 application.

1B

*Mocap 15G

(ethoprop)

At planting: 8 oz/1000 row ft

–

48

At planting

No more than 1 application.

1B

*Thimet 20-G

(phorate)

At planting or cultivation: 4.5–6.0 oz/1000 row ft

–

48

Ears, forage: 30

No more than 1 application.

3A

*Asana XL Insecticide

(esfenvalerate)

5.8–9.6 fl oz

96 fl oz

12

1

–

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

28 fl oz

12

0

–

3A

*Brigade 2EC Insecticide/Miticide

(bifenthrin)

In-furrow T-band at plant: 0.15–0.30 fl oz/1000 row ft

Foliar: 2.1–6.4 fl oz

12.8 fl oz

12

1

Many other brands available with same active ingredient.

3A

*Capture LFR

(bifenthrin)

Preplant incorporated: 4.0–5.3 fl oz

At plant: 3.4–17.0 fl oz

Preemergence: 3.4 fl oz

17.0 fl oz

12

Preplant incorporated at planting, preemergence application

For mixing with liquid fertilizer.

3A

*Force 3G

(tefluthrin)

4–5 oz/1000 row ft

–

48

At planting or cultivation within 30 days of seeding emergence

No more than 1 application.

3A

*Warrior II

(lambda-cyhalothrin)

At plant: 0.33 fl oz/1000 row ft

Foliar: 1.28–1.92 fl oz

30.72 fl oz

24

Ears (foliar): 1

Feeding livestock or at-plant applications: 21

Many other brands available with same active ingredient.

3A + 28

*Besiege

(lambda-cyhalothrin + chlorantraniliprole)

6–10 fl oz

31 fl oz per year

24

1

–

3A + 28

*Elevest

(bifenthrin + chlorantraniliprole)

4.8–9.6 fl oz

–

12

1

No more than 2 applications per year.

Spider mites

3A

*Brigade 2EC Insecticide/Miticide

(bifenthrin)

5.12–6.4 fl oz

12.8 fl oz

12

1

Many other brands with same active ingredient available.

3A

*Hero Insecticide

(bifenthrin + zeta-cypermethrin)

10.3 fl oz

27.39 fl oz

12

3

–

3A + 4C

Ridgeback

(bifenthrin + sulfoxaflor)

4.5–13.8 fl oz

27.6 fl oz

24

7

–

3A + 28

*Elevest

(bifenthrin + chlorantraniliprole)

7.7–9.6 fl oz

–

12

1

No more than 2 applications per year.

6

*Agri-Mek SC

(abamectin)

1.75–3.50 fl oz

7 fl oz per year

12

7

Must be mixed with a nonionic activator-type wetting, spreading, or penetrating adjuvant. Do not use binder or sticker adjuvant.

23

Oberon 2SC

(spiromesifen)

5.7–16 fl oz

17 fl oz

12

Ears, green forage, silage: 5

Grain or stover: 30

–

Thrips (check label for species controlled)

1B

*Counter 15G Lock ‘n Load

(terbufos)

Banded or in furrow: 6.0–8.0 oz per 1000 row ft

Postemergence incorporated: 8 oz per 1000 row ft at cultivation

–

48

60

No more than 1 application.

1B

Fyfanon 57% EC

(malathion)

1.5 pt

–

12

5

No more than 2 applications per year. Crop injury may occur in the whorl to silking stages.

1 Mode of Action (MOA) codes for plant pest insecticides from the Insecticide Resistance Action Committee (IRAC) Mode of Action Classification v. 11.1 January 2024. Number codes are used to distinguish the main insecticide mode of action groups, with additional letters for certain subgroups within each main group. All insecticides within the same group (with the same number) indicate the same active ingredient or similar mode of action. This information must be considered for the insecticide resistance management decisions.

2 Always double-check labels regarding maximum application limits. Many labels are changing from a maximum rate per season (or crop cycle) to a maximum rate per year.

3 Information provided in this table applies only to Florida. Be sure to read a current product label before applying any product. The use of brand names and any mention or listing of commercial products or services in the publication does not imply endorsement by UF/IFAS Extension nor discrimination against similar products or services not mentioned.

*Restricted use insecticide.

Table 7. Sweet corn fungicides ordered by disease and then FRAC group according to their mode of action. Labels change frequently. Be sure to read a current product label before applying any chemical. Please refer to chapter 19 for information on biopesticides, including materials labeled for certified organic production. Contact: Katia Viana Xavier, UF/IFAS Everglades Research and Education Center.

Pertinent Diseases or Pathogens

Fungicide Group1

Chemical (Active Ingredients)

Max Rate/Acre

Min. Days to

Remarks3

Appl.

Season2

Harvest

Reentry

Bacterial stalk rot

M1

(copper compounds)

Many brands available: AmeriCop 40 DF, Badge SC, Badge X2, ChampION++, Copper Count N, Cueva, Kocide 2000, Kocide 3000, Mastercop, Nu-Cop 50 DF, Top Cop w/Sulfur

SEE INDIVIDUAL LABELS

SEE INDIVIDUAL LABELS

1

Varies by product from 4 hr to 2 days

–

Damping-off

M3

Signet 480FS

(thiram)

5.0 oz/100 lb of seed

–

–

1

Seed treatment only.

Damping-off seedling blight

3

Vortex

(ipconazole)

0.085 fl oz/100 lb of seed

–

–

0.5

Seed treatment only.

4 + 3

Dividend Extreme

(mefenoxam + difenoconazole)

5 fl oz/100 lb of seed

–

–

2

Seed treatment only.

11

Dynasty

(azoxystrobin)

0.153 fl oz/100 lb of seed

–

–

4

Seed treatment only.

11

Trilex

(trifloxystrobin)

0.32–0.96 fl oz/100 lb of seed

–

–

–

Seed treatment only.

Eye spot

3

(propiconazole)

Many brands available: Amtide Propiconazole 41.8, Bumper 41.8EC, Fitness, Propiconazole E-AG 41.8EC, Propimax EC, Tilt

4 fl oz

16 fl oz

14

0.5–1

No more than 4 total applications.

3 + 7 + 11

Miravis Neo

(propiconazole + pydiflumetofen + azoxystrobin)

13.7 fl oz

44.5 fl oz

14

0.5

No more than 2 sequential applications.

3 + 11

Delaro

(prothioconazole + trifloxystrobin)

8 fl oz

32 fl oz

Forage and ears: 0

Fodder: 14

0.5

No more than 2 sequential applications.

7

Vertisan

(penthiopyrad)

24 fl oz

48 fl oz

7

0.5

Soil and foliar treatments. See label for details.

7 + 11

Priaxor

(fluxapyroxad + pyraclostrobin)

8 fl oz

16 fl oz

7

0.5

Alternate with fungicides of dissimilar modes of action.

11

Aftershock

(fluoxastrobin)

Foliar: 3.8 fl oz

15.27 fl oz

7

0.5

Soil and foliar treatments. See label for details.

11

Evito 480SC

(fluoxastrobin)

3.8 fl oz

15.2 fl oz

7

0.5

No more than 2 sequential and 4 total applications.

11

Headline

(pyraclostrobin)

12 fl oz

72 fl oz

7

0.5

No more than 2 sequential and 6 total applications of Headline or other Qol fungicides.

11

Headline SC

(pyraclostrobin)

12 fl oz

72 fl oz

7

0.5

No more than 2 sequential and 6 total applications of Headline or other Qol fungicides.

11

Quadris

(azoxystrobin)

15.5 fl oz

120 fl oz

7

4 hr

No more than 1 sequential and 4 total applications of Quadris or other Qol fungicides. See label for soil applications.

11 + 3

Avaris

(azoxystrobin + propiconazole)

14 fl oz

28 fl oz

14

0.5

See label for details.

11 + 3

Evito T

(fluoxastrobin + tebuconazole)

9 fl oz

36 fl oz

7

19

No more than 2 sequential and 4 total applications.

11 + 3

Headline AMP

(pyraclostrobin + metconazole)

14.4 fl oz

57.6 fl oz

7

0.5

No more than 2 sequential and 4 total applications.

11 + 3

Helmstar Plus

(azoxystrobin + tebuconazole)

10.8 fl oz

43.2 fl oz

7

19

Do not spray after V8 growth stage.

11 + 3

Quilt

(azoxystrobin + propiconazole)

14 fl oz

56 fl oz

14

0.5

Alternate every other application with a fungicide of dissimilar mode of action.

11 + 3

Quilt XCEL

(azoxystrobin + propiconazole)

14 fl oz

56 fl oz

14

0.5

Alternate every other application with a fungicide of dissimilar mode of action.

11 + 3

Stratego

(trifloxystrobin + propiconazole)

12 fl oz

24 fl oz

14

0.5

No more than 2 sequential applications.

11 + 3

Stratego YLD

(trifloxystrobin + propiconazole)

5 fl oz

20 fl oz

14

0.5

No more than 2 sequential applications.

11 + 3

Topguard EQ

(flutriafol + azoxystrobin)

7 fl oz

14 fl oz

–

3

No more than 2 applications per season.

11 + 3

Veltyma

(pyraclostrobin + mefentrifluconazole)

10 fl oz

20 fl oz

21

0.5

See label for details.

Gray leaf spot

3

(tebuconazole)

Many brands available: Folicur 3.6F, Monsoon 3.6F, Orius 3.6F, Tebustar 3.6L, Tebuzol 3.6F, Toledo 3.6F

6 fl oz

24 fl oz

7

0.5

–

3

Topguard

(flutriafol)

14 fl oz

28 fl oz

7

3

No more than 2 applications per year.

3

Xyway LFR

(flutriafol)

5.8–15.2 fl oz

15.2 fl oz

–

0.5

Apply to corn in-furrow at planting or postemergence directed to the soil.

3 + M2

Unicorn

(tebuconazole + sulfur)

3.75 lb

15.0 lb

14

19

See label for details and rotational restrictions.

3 + 7

Revylok

(mefentrifluconazole + fluxapyroxad)

15 fl oz

30 fl oz

21

0.5

No more than 2 applications per season.

3 + 7 + 11

Miravis Neo

(propiconazole + pydiflumetofen + azoxystrobin)

13.7 fl oz

44.5 fl oz

14

0.5

No more than 2 sequential applications.

3 + 7 + 11

Revytek

(mefentrifluconazole + fluxapyroxad + pyraclostrobin)

15 fl oz

30 fl oz

21

0.5

See label for details.

3 + 33

Viathon

(tebuconazole + potassium phosphite)

3.0 pt

16.5 pt

7

0.5

See label for details and rotational restrictions.

7 + 11

Priaxor

(pyraclostrobin + fluxapyroxad)

8 fl oz

16 fl oz

7

0.5

Alternate with a fungicide of dissimilar mode of action.

3 + 11

Veltyma

(mefentrifluconazole + pyraclostrobin)

10 fl oz

30 fl oz

21

0.5

–

Northern corn leaf blight, southern corn leaf blight, common rust, northern corn leaf spot

M3

(mancozeb)

Many brands available: Dithane F45 Rainshield, Dithane M45, Koverall, Manzate Max, Manzate Pro-Stick, Penncozeb 75DF, Penncozeb 80WP, Roper DF, Roper DF Rainshield

1.5 lb

24 lb

7

1

Start applications at the first sign of disease.

M5

(chlorothalonil)

Many brands available: Bravo Ultrex, Bravo Weather Stik, Chlorothalonil 720, Echo 720, Echo 90DF, Echo ZN, Equus 720 SST, Initiate 720, Initiate ZN

See individual label

See individual label

7

0.5–1

–

3

(propiconazole)

Many brands available: Bumper 41.8 EC, Fitness, Propimax EC, Propi-Star EC, Tilt, Topaz, Willowood Propicon 3.6EC

4 fl oz

16 fl oz

14

0.5

No more than 4 total applications.

3

Prosaro® 421 SC

(tebuconazole + prothioconazole)

8.2 fl oz

26 fl oz

21

0.5

See label for adjuvant information and rotational restrictions.

3

(tebuconazole)

Many brands available: Monsoon, Onset 3.6L, Orius 3.6F, Tebu-Crop, Tebustar 3.6L, Tebuzol 3.6F, Toledo 3.6F

6 fl oz

24 fl oz

7

0.5

–

3

Topguard

(flutriafol)

14 fl oz

28 fl oz

7

3

No more than 2 applications per year.

3

Xyway LFR

(flutriafol)

15.2 fl oz

5.8–15.2 fl oz

–

0.5

Apply to corn in-furrow at planting or postemergence directed to the soil.

3 + M2

Unicorn

(tebuconazole + sulfur)

3.75 lb

15 lb

14

19

See label for details and rotational restrictions.

3 + 7

Revylok

(mefentrifluconazole + fluxapyroxad)

15 fl oz

30 fl oz

21

0.5

No more than 2 applications per season.

3 + 7

Propulse

(prothioconazole + fluopyram)

13.7 fl oz

27.4 fl oz

0

1

No more than 2 sequential applications.

3 + 7 + 11

Miravis Neo

(propiconazole + pydiflumetofen + azoxystrobin)

13.7 fl oz

44.5 fl oz

14

0.5

No more than 2 sequential applications.

3 + 7 + 11

Revytek

(mefentrifluconazole + fluxapyroxad + pyraclostrobin)

15 fl oz

30 fl oz

21

0.5

See label for details.

3 + 7 + 11

Trivapro

(propiconazole + benzovindiflupyr + azoxystrobin)

13.7 fl oz

54.8 fl oz

14

0.5

No more than 2 sequential applications before alternating with a fungicide of dissimilar mode of action.

3 +11

Delaro

(prothioconazole + trifloxystrobin)

8 fl oz

32 fl oz

0

0.5

No more than 2 sequential applications.

3 +11

Veltyma

(mefentrifluconazole + pyraclostrobin)

10 fl oz

30 fl oz

21

0.5

No more than 3 applications of 10 fl oz/A or 4 applications of 7 fl oz/A.

3 + 33

Viathon

(tebuconazole + potassium phosphite)

3.0 pt

16.5 pt

7

0.5

See label for details and rotational restrictions.

7

Vertisan

(penthiopyrad)

24 fl oz

48 fl oz

7

0.5

Soil and foliar treatments.

7 + 11

Elatus

(benzovindiflupyr + azoxystrobin)

7.3 oz

14.6 fl oz

7

0.5

Alternate with fungicides of dissimilar modes of action.

11

Aftershock

(fluoxastrobin)

3.8 fl oz

15.27 fl oz

7

0.5

Foliar treatments.

11

Aproach

(picoxystrobin)

12 fl oz

36 fl oz

7

0.5

See label for details.

11

Evito 480SC

(fluoxastrobin)

3.8 fl oz

15.2 fl oz

7

0.5

No more than 2 sequential applications and 4 total applications.

11

Headline

(pyraclostrobin)

12 fl oz

72 fl oz

7

0.5

No more than 2 sequential applications and 6 total applications of Headline or other Qol fungicides.

11

Headline SC

(pyraclostrobin)

12 fl oz

72 fl oz

7

0.5

No more than 2 sequential applications and 6 total applications of Headline or other Qol fungicides.

11

Quadris

(azoxystrobin)

15.5 fl oz

120 fl oz

7

4 hr

No more than 2 sequential applications and 4 total applications of Quadris or other Qol fungicides. See label for soil applications.

11

Willowood Azoxy 2 SC

(azoxystrobin)

15.5 fl oz

62 fl oz

7

4 hr

No more than 2 sequential applications.

11 + 3

Avaris

(azoxystrobin + propiconazole)

14 fl oz

56 fl oz

14

0.5

See label for details.

11 + 3

Custodia

(azoxystrobin + tebuconazole)

12.9 fl oz

51.7 fl oz

21

0.5

See label for details.

11 + 3

Evito T

(fluoxastrobin + tebuconazole)

9 fl oz

36 fl oz

7

19

No more than 2 sequential applications and 4 total applications.

11 + 3

Headline AMP

(pyraclostrobin + metconazole)

14.4 fl oz

57.6 fl oz

7

0.5

No more than 2 sequential applications and 4 total applications.

11 + 3

Quilt XCEL

(azoxystrobin + propiconazole)

14 fl oz

56 fl oz

14

0.5

Alternate every other application with a fungicide of dissimilar mode of action.

11 + 3

Stratego

(trifloxystrobin + propiconazole)

12 fl oz

24 fl oz

0

0.5

No more than 2 sequential applications.

11 + 3

Stratego YLD

(trifloxystrobin + propiconazole)

5 fl oz

20 fl oz

0

0.5

No more than 2 sequential applications.

11 + 3

Topguard EQ

(flutriafol + azoxystrobin)

7 fl oz

14 fl oz

7

3

No more than 2 applications per season.

11 + 7

Priaxor

(pyraclostrobin + fluxapyroxad)

8 fl oz

16 fl oz

7

0.5

See label for details.

Powdery mildew, rusts

M2

(sulfur)

Many brands available: Microfine Sulfur, Sulfur 90W, Top Cop with Sulfur, Yellow Jacket Wettable Sulfur

See individual label

See individual label

1

1

Do not apply during periods of warm weather. Do not apply within 2 weeks of an oil spray.

Pythium seedling blight, systemic downy mildew

4

(metalaxyl)

Various brands available: Acceleron, Acquire, Allegiance, Sebring 2.65ST

3 fl oz/100 lb seed

–

–

1

Seed treatment only.

4

Apron XL

(mefenoxam)

2.2 fl oz/100 lb seed

–

–

2

Seed treatment only.

33

(mono- and dipotassium salts of phosphorous acid)

Various brands available: Confine Extra, K-phite

3 qt

–

0

4 hr

See label for details.

Rhizoctonia root and stalk rot diseases

11

Aftershock

(fluoxastrobin)

Soil: 0.24 fl oz/1000 row ft

15.2 fl oz

7

0.5

Soil and foliar treatments. See label for details.

Tar spot

3 + 7

Revylok

(mefentrifluconazole + fluxapyroxad)

15 fl oz

30 fl oz

21

0.5

No more than 2 applications per season.

3 + 7 + 11

Delaro Complete

(prothioconazole + fluopyram + trifloxystrobin)

8 fl oz

32 fl oz

Forage and ears: 0

Fodder: 14

0.5

No more than 2 sequential applications.

3 + 7 + 11

Miravis Neo

(propiconazole + pydiflumetofen + azoxystrobin)

13.7 fl oz

44.5 fl oz

14

0.5

No more than 2 sequential applications.

3 + 7 + 11

Revytek

(mefentrifluconazole + fluxapyroxad + pyraclostrobin)

15 fl oz

30 fl oz

21

0.5

See label for details.

3 + 7 + 11

Trivapro

(propiconazole + benzovindiflupyr + azoxystrobin)

13.7 fl oz

54.8 fl oz

14

0.5

No more than 2 sequential applications before alternating with a fungicide of dissimilar mode of action.

3 + 11

Delaro

(prothioconazole + trifloxystrobin)

8 fl oz

32 fl oz

Forage and ears: 0

Fodder: 14

0.5

No more than 2 sequential applications

3 + 11

Veltyma

(mefentrifluconazole + pyraclostrobin)

10 fl oz

30 fl oz

21

0.5

No more than 3 applications of 10 fl oz/A or 4 applications of 7 fl oz/A.

Various seedling diseases

1

Thiabendazole 4L ST

(thiabendazole)

0.41 fl oz/80,000 kernel count

–

–

0.5

–

1 + 4 + 11 + 12

Maxim Quattro

(thiabendazole + mefenoxam + azoxystrobin + fludioxonil)

–

–

–

0.5

Seed treatment only.

3

Difenoconazole 3L ST

(difenoconazole)

1.25 fl oz/100 lb of seed

–

–

0.5

Seed treatment only.

3 + 4

EverGol Energy

(metalaxyl + prothioconazole)

2 fl oz/100 lb of seed

–

–

0.5

Seed treatment only.

4 + 14 + NC

System 3

(mefenoxam + PCNB + Bacillus subtilis GB03)

3 oz/bu of seed

–

–

1

Seed treatment only.

7

Kernel Guard Supreme

(carboxin + permethrin)

–

–

–

0.5

Seed treatment only.

11

Stamina

(pyraclostrobin)

1.6 fl oz/100 lb of seed

–

–

–

Seed treatment only.

12

(fludioxonil)

Various brands available: Dyna-Shield, Maxim 4FS, Spirato 480 FS

0.16 fl oz/100 lb of seed

–

–

0.5

Seed treatment only.

14

Rizolex

(tolclofos-methyl)

0.3 fl oz/100 lb of seed

–

–

0.5

Seed treatment only.

1 FRAC code (fungicide group): Numbers and letters are used to distinguish the fungicide mode of action groups. All fungicides within the same group (with same number or letter) indicate the same active ingredient or similar mode of action. This information must be considered for the fungicide resistance management decisions. Source: FRAC Code List; https://www.frac.info/(FRAC = Fungicide Resistance Action Committee).

2 Always double-check labels regarding maximum application limits. Many labels are changing from a maximum rate per season (or crop cycle) to a maximum rate per year.

3 Information provided in this table applies only to Florida. Be sure to read a current product label before applying any chemical. The use of brand names and any mention or listing of commercial products or services in the publication does not imply endorsement by UF/IFAS Extension nor discrimination against similar products or services not mentioned.

Table 8. Nonfumigant nematicides for sweet corn in Florida. Contact: Johan Desaeger, UF/IFAS Gulf Coast Research and Education Center.

Product

Broadcast or Overall Rates

Row Rates

Per Acre

Per 1000 sq ft

Per Acre, 36" Row Spacing

Per 1000 Row ft, Any Row Spacing

Counter 15G (terbufos)*

–

–

5.4–7.3 lb

6.0–8.0 oz

Mocap 15G (ethoprophos)**

40 lb

0.9 lb

10.8–14.8 lb

0.75–1.0 lb

Velum (fluopyram)

Apply 6.5–6.8 fl oz/A either by in-furrow spray during planting directed on or below seed, or by chemigation into root zone through low-pressure drip or trickle irrigation. No more than 6.84 fl oz/A of Velum (0.446 lb/A of fluopyram) per year, regardless of formulation or method of application (soil or foliar). Do not apply Velum within 14 days of harvest. Do not allow livestock to graze treated area for 14 days, and do not harvest for food or feed within 14 days of application.

Biological nematicides

See chapter 19.

*Apply banded or in the row not to exceed 8.7 lb/A. **Do not allow Mocap to come in contract with seed. Apply as a 12 to 15 in. band treatment, incorporating Mocap product according to label instructions. These products are not as consistently effective against root-knot nematodes as the fumigants but are registered as indicated.

Table 9. Fumigant nematicides for sweet corn in Florida.

Nematicide

Broadcast Application1

In-the-Row Applications

Gallons per Acre

fl oz/1000 ft/chisel spaced 12" apart

Telone II2, 3

9–12

26–35

For any row spacing, application rates given may be concentrated in the row but shall never exceed the labeled maximum for broadcast applications. Consult the product label for additional detail.

Telone C-172, 3

10.8–17.1

31.8–50.2

For any row spacing, application rates given may be concentrated in the row but shall never exceed the labeled maximum for broadcast applications. Consult the product label for additional detail.

Telone C-352, 3

13–20.5

38–60

For any row spacing, application rates given may be concentrated in the row but shall never exceed labeled maximum for broadcast applications. Consult the product label for additional detail.

Pic-Clor 60

19–31.5

57–90

For any row spacing, application rates should never exceed the labeled maximum for broadcast applications. Consult the product label for additional detail.

Vapam HL

75

–

For drip or in-row chisel fumigation, consult product label for proportionately reduced overall rates, drip concentration, and flow-modifying directions and procedures.

KPam HL

60

–

For drip or in-row chisel fumigation, consult product label for proportionately reduced overall rates, drip concentration, and flow-modifying directions.

Allyl isothiocyanate (AITC)

Dominus

40

–

For drip or in-row fumigation and crop termination, consult product label for proportionately reduced overall rates, drip concentration, and flow-modifying directions

1 Gallons/acre and fl oz/1000 ft provided only for mineral soils. Higher rates may be possible for heavier-textured (loam, silt, clay) or highly organic soils.

2 All of the fumigants mentioned are for retail sale and use only by state certified applicators or persons under their direct supervision. New supplemental labeling for the Telone products must be in the hands of the user at the time of application. See new label details for additional use restrictions based on soil characteristics, buffer zones, Fumigant Management Plans (FMP), requirements for Personal Protective Equipment (PPE), mandatory good agricultural practices (GAPs), product and applicator training certification, and other rate-modifying recommendations.

3 Higher application rates are possible in the presence of cyst-forming nematodes.

Rates are believed to be correct for products named and similar products of other brand names when applied to mineral soils. Higher rates are required for muck (organic) soils. However, the grower has the final responsibility to see that each product is used legally; read the label of the product to be sure that you are using it properly.