RESISTÊNCIA DE CULTIVARES DE ARROZ A Diatraea saccharallis (Lepdoptera: Crambidae)

Abstract

The rice crop has great added value, being considered one of the most important crops in several countries and widely consumed by Brazilians. Therefore, it becomes extremely significant to study management practices so that the production of this grain takes place on a large scale, minimizing external agents that can disrupt its productivity. The sugarcane borer Diatraea saccharalis is a pathogen that occurs in most rice growing areas. Therefore, the objective of this study was to evaluate the tolerance of eight rice cultivars that are resistant to D. saccharalis in different genotypes provided, in a protected environment, namely: Primavera, Canela-de-ferro, Lageado slight, Progresso, Nenenzinho, White kid, Bico-ganga and Xingú. D. saccharalis caterpillars were placed in “Eppendorf” in the amount of fifteen caterpillars per plant, totaling seventy-five caterpillars. The number of stems, number of stems without damage, internal diameter of the plant, external diameter of the plant, extent of damage, number of live larvae, and fresh mass of caterpillars were evaluated. Of these plant variables, only the number of stems and the number of stems without damage showed statistical differences and, checking the aspects of the caterpillars, no cultivar showed a significant difference for the analyzed factors.