Efeito de fungicidas no tratamento de sementes de milho sobre Penicillium spp. E Fusarium verticillioides

Abstract

Corn is a cereal that holds great importance for Brazilian agriculture. In seed treatment with fungicides and insecticides, it is a tool used to control pests and ensure an initial plant stand. Other products can also be added to improve seed germination and vigor, such as micronutrients. Considering organic corn production, there is a lack of alternatives for seed treatment since the use of agricultural pesticides and traditional inputs is not allowed. Corn experiments were conducted in the laboratory and greenhouse of the Institute of Agricultural Sciences at the Federal University of Uberlândia, in Uberlândia-MG, under the natural presence of pathogens in the years 2021. The objective of this study was to evaluate the effect of fungicides on storage fungi Penicillium spp. and Fusarium spp. in corn cultivars. The cultivars used were 950 420 VIP3, ADV 19 201, and ADV 9633 VT2P. The treatments with different concentrations of active ingredient, formulations, and doses per 100kg of seeds were 12, plus one control treatment: T1- Adago (vegetable extract), T2 - Biofac (fungal fermented product), T3- Pirolenhoso (carboxylic acid), T5 - Evolution (strobilurins (azoxystrobin), dithiocarbamate, (mancozeb), and triazolinthione (prothioconazole)), T6 - Fezangold (tebuconazole + chlorothalonil), T7 - Fox (prothioconazole + trifloxystrobin), T8 - Previnil - (chlorothalonil), T9 - Redigo (prothioconazole), T10 - Score (Difenoconazole), T11 - Serenade (Bacillus subtilis strain QST 714), T12 - Versatilis (fenpropimorph), T13 - Control. The data obtained were subjected to analysis of variance, with Scott-Knott mean comparison test according to the ANOVA result. The systemic chemical treatments showed greater efficacy.