VÍRUS DA POLIEDROSE NUCLEAR (VPN) EM SOJA: UMA AVALIAÇÃO DE CAMPO PARA Chrysodeixis includens DE MAIORES TAMANHOS

Abstract

Several species of Nuclear Polyhedrosis Virus (NPV), in the same species, is a recent microbial control strategy against defoliating caterpillars in soybeans, such as Chrysodeixis includens (Walker) (Lepidoptera: Noctuidae). But the influence of these multiple NPVs, combined with natural additives, such as cane molasses, in the population of C. includens needs to be evaluated in real field conditions. The objective was to evaluate the number of C. includens caterpillars, of larger size (> 17 mm), in soybean plants after foliar water spray (T1, absolute control), Indoxacarb (Oxadiazine insecticide) (T2), Bacillus thuringiensis var. kurstaki (T3), Surtivo®Soja100: HearNPV + ChinNPV (T4), Surtivo®Soja100 + molasses (T5), Surtivo®Plus140: AcMNPV + HearNPV + ChinNPV + SfMNPV (T6) and Surtivo®Plus140 + melo (field). The test was conducted in a commercial crop of Glycine max L. (cv. Syngenta 1163 RR®). The number of large caterpillars (> 17 mm) was counted, by tapping cloth, at 0, 4, 8, 14 and 21 days after application. The target of applications with Surtivo®Soja100 and Surtivo®Plus140 are small caterpillars, but this treatment also reduced the number of large size caterpillars, with a greater residual effect than the insecticide Indoxacarb or Bacillus thuringiensis var. kurstaki.