SUSCETIBILIDADE DE Spodoptera frugiperda ALIMENTADA COM DIFERENTES TECNOLOGIAS DE MILHO À BACULOVÍRUS

Abstract

Spodoptera frugiperda, known as fall armyworm, is an important pest capable of causing damage to various crops such as soybeans, cotton, sorghum, rice and especially corn. The occurrence of fall armyworm can reduce corn grain yield by up to 60%. Within this context, baculoviruses, such as SfMNPV, are an excellent tool for managing fall armyworm in corn. Thus, the objective of this work was to evaluate the efficiency of the SfMNPV baculovirus on S. frugiperda fed on different biotechnologies of maize cultivars. The experiment wasconducted at the company AgriVeneza in the municipality of Nova Veneza, Goiás. From the moment of hatching until the insects were used in the experiments, the caterpillars were fed with leaves of conventional maize AG1051. Upon reaching the second larval instar, the caterpillars were transferred to feed on the following treatments: AG1051, AG8061 (Cry1A.105+Cry2Ab2), P3707VYH (Cry1Ab + Cry1F + Vip3Aa20), AG1051 + SfMNPV, AG8061 + SfMNPV and P3707VYH + SfMNPV. The experimental design was completely randomized (DIA) containing 6 treatments composed of 3 groups of repetitions containing 30 experimental units (UE). The experimental EU had a Petri dish lined with wet filter paper, a corn leaf and a caterpillar. Assessments were performed every 24 h for a period of 8 days. Mortality values were submitted to ANOVA and means compared by Tukey's test. The highest insect control efficiency occurred in the treatment with the recent biotechnology P3707VYH, followed by the treatments containing SfMNPV.