EFICIÊNCIA DE BIOESTIMULANTES E FUNGICIDA NOS CARACTERES AGRONÔMICOS E ECONÔMICOS NA CULTURA DO MILHO VERDE

RESUMO - O objetivo do trabalho foi avaliar o desempenho agronomico e economico na cultura do milho verde submetida ao uso de bioestimulantes na presenca e ausencia de fungicida. Dessa forma, dois experimentos foram conduzidos em anos distintos, em delineamento experimental de blocos ao acaso com tres repeticoes, em arranjo fatorial 4x2. O primeiro fator correspondeu a combinacao de bioestimulantes (Ausencia, MC Cream, MC Extra, MC Cream+MC Extra) e o segundo fator a presenca e ausencia de fungicida (piraclostrobina + epoxiconazole). Foi avaliado o peso de espigas verdes, a altura de plantas, diâmetro de colmo, teor de clorofila e severidade de doencas, alem da viabilidade economica dos tratamentos. Os Bioestimulantes, na ausencia de fungicida, foram eficientes para aumentar o peso das espigas verdes, altura de plantas, e o teor de clorofila. Na presenca do fungicida os bioestimulantes aumentaram o diâmetro de colmo e reduziram a severidade de doencas. Os investimentos em insumos elevaram os custos de producao, porem a rentabilidade foi compensada pelo aumento da renda bruta. Em situacao de baixa disponibilidade hidrica, o bioestimulante MC Extra foi o mais viavel economicamente para a cultura do milho verde. Palavras-chave: fitossanidade, produtividade, renda liquida, Zea mays L. EFFICIENCY OF BIOSTIMULANTS AND FUNGICIDE IN THE AGRONOMIC AND ECONOMIC CHARACTERS OF GREEN CORN ABSTRACT – The objective of this work was to evaluate the agronomic and economic performance of the green corn crop, subjected to the use of biostimulants in the presence and absence of fungicide. Two experiments were conducted in different years using a randomized block design with three replications, in a 4x2 factorial arrangement. The first factor corresponded to the combination of biostimulants (Absence, MC Cream, MC Extra, MC Cream + MC Extra) and the second factor was the presence and absence of fungicide (pyraclostrobin + epoxiconazole). Green ear weight, plant height, stem diameter, chlorophyll content and severity of diseases were evaluated, as well as the economic viability of the treatments.In the absence of fungicide, biostimulants were efficient to increase the green ear weight, plant height, and chlorophyll content. In the presence of the fungicide, biostimulants increased stem diameter and reduced disease severity. Investments in inputs increased production costs, but profitability was offset by the increase in gross income. In a situation of low water availability, the biostimulant MC Extra was the most economically viable for the green maize crop. Keywords: plant health, productivity, net income, Zea mays L.