Interação de entomopatógenos e inseticida químico sintético com Spodoptera frugiperda (JE SMITH, 1797) (Lepidoptera: Noctuidae) e o predador Ceraeochrysa cubana (Hagen, 1861) (Neuroptera: Chrysopidae)

Abstract

This study aimed to evaluate the interaction of entomopathogens and synthetic insecticide with S. frugiperda and the predator C. cubana, in the larva, pupa and adult stages of both species. The experiment was carried out in the laboratory. The experimental design was completely randomized (DIC): T1: control (sterilized distilled water + Tween 80 ®), T2: Agree® (Bacillus thuringiensis aizawai GC-90 0.35 to 0.50 Kg pc/ha), T3: Xentari® (Bacillus thuringiensis, subsp. aizawai 0.50 at 1.0 Kg bw/ha), T4: Diplomata® (Baculovirus Virus HaNPV 50 to 200 mL/ha), T5: Armigen® (VPN-HzSNPV Virus 100 to 200 mL/ha); T6: Klorpan® (Chemical group: Organophosphate; Active ingredient: Chlorpyrifos; 0.4 - 0.6 L/ha) For all products, the average dose recommended for the management of S. frugiperda was used. Each treatment consisted of 5 repetitions, each with 6 caterpillars. The treatments were applied using a Potter tower on 1st instar caterpillars and diet cube and on 1st, 2nd and 3rd instar larvae of the predator. The percentage of accumulated mortality in 10 days, pupation, mortality in the pupal stage, and insects that reached the adult stage were evaluated. The synthetic chemical insecticide provided 100 % mortality for both species. For S. frugiperda pupation, all biological products allowed the formation of pupae, in a significantly higher quantity than the control. For the amount of S. frugiperda that reached the adult stage, all biological products provided a significant reduction in this parameter. For C. cubana species, it was observed that the biological products did not provide significant pathogenic action in any of the evaluated parameters.