BIOLOGIA E CONTROLE DE Pycnoscelus Surinamensis L. POR EXTRATOS VEGETAIS E FUNGOS ENTOMOPATÓGÊNICOS COMERCIAIS

Abstract

This paper aims to investigate the susceptibility of Coackroach Suriname (Pycnoscelus surinamensis) to entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana, and vegetable products. The first phase of the research aimed to study the biological cycle of the insect. The second step was using bioassays in the laboratory using eight commercial products at different doses and each with three replicates being made three applications at weekly intervals. 10 cockroaches were placed in each container and kept in this chamber at 25 °C and U.R. of 70%. The treatments were: Beauveria bassiana (Bals.) Vuill (Boveril® B102), B. bassiana (Bovenat®), Metarhizium anisopliae (Metsch.) Sorok (Metarril® M102); M. anisopliae (Metanat®), all doses of 1, 2, 3 and 5 kg ha-1; azadirachtin (Natuneem®), neem oil + pepper extract (Nim-I-Go®), neem + timbó + citronella + fedegoso + geranium + organic acids (Compostonat®), rotenone (Rotenat®), all at concentrations of 0.5, 1.0, 2.0, 3.0 and 5.0%, and control (distilled water). The Compostonat® at a dose of 5% was 100% effective in controlling the 1st application and also excelled on the lowest dose applied, reaching 83.33% efficiency in the 3rd application at a dose of 0.5%. We observed five instars: the first lasts an average of 18 days, the second 22, third 36, fourth and fifth in 45 days 63 days on average. Reproduce between 45 and 60 days after adult average of 25 nymphs per ootheca and average adult length of 24 mm.