Marcio F. R. Resende
0000-0002-2367-0766

Specialist

associate professor, UF/IFAS Department of Horticultural Sciences, Gainesville, FL

Horticultural Sciences profile

Publications

Strategies for Improving Phosphorus Use Efficiency in Lettuce Grown on Histosols

Gustavo Kreutz, Jehangir H. Bhadha, Guodong Liu, Marcio F. R. Resende, Alan L. Wright, Dennis C. Odero, andGermán V. Sandoya

The global demand for P fertilizers has been significantly increasing, resulting in higher costs and environmental concerns associated with eutrophication. Fertilizer expenses and environmental risks can be reduced through the implementation of sustainable strategies. This new 6-page publication of the UF/IFAS Horticultural Sciences Department compiles several strategies to improve the utilization of P fertilization in lettuce grown in the Everglades Agricultural Area.

Identification and Management of Foliar Diseases Associated with Sweet Corn in Florida

Vitor Silva de Moura, Anna Mészáros, Nicholas S. Dufault, Marcio F. R. Resende, andKatia Viana Xavier

Sweet corn is a high-value crop for the fresh market. This publication is intended for Florida sweet corn growers, crop consultants, and Extension professionals to support accurate identification and effective management of foliar diseases caused by fungal pathogens. These diseases consistently threaten market quality, requiring an integrated management approach. Host resistance involves selecting hybrids that resist the diseases most likely to occur in a given season. Cultural practices reduce inoculum and make conditions less favorable for disease. Fungicide applications use multi-site protectants and site-specific products. Fungicides are most effective before disease is observed, when timed to coincide with crop growth stages, and during periods of high disease risk. Pathogen pressure, corn susceptibility, and weather conditions vary across Florida’s production regions, so regular scouting, accurate disease identification, and timely decisions are essential.

Tar Spot of Maize in Florida

Larissa Carvalho Ferreira, Vitor Augusto Silva de Moura, Marcio F. R. Resende, and Katia Viana Xavier

Tar spot, a fungal foliar disease, affects most maize types commonly grown in Florida, such as sweet corn, field corn, and criollo corn. This disease is characterized by brown-to-black, raised structures called stromata, which are embedded in leaf tissue. As a polycyclic disease, tar spot lesions can increase in number as the disease progresses throughout the growing season, leading to reduction of photosynthetic area on the leaves. Tar spot has recently emerged as a significant threat in Florida and in the United States, with reports of up to 100% incidence in maize fields in south Florida. Tar spot occurrence and development in Florida is influenced by several factors, such as environmental conditions, maize types, crop maintenance, and corn growth stages. The purpose of this publication is to promote awareness among Florida growers regarding this newly identified disease and its management practices.