BIOINSUMOS NA PROTEÇÃO CONTRA PRAGAS EXÓTICAS: O CASO DA SOJA E MYRIAPODA

Abstract

The objective was to evaluate the efficiency of seed treatment (TS) in soybean against Scutigerella immaculata, with the biological organism Bacillus amyloliquefaciens isolated and in mixtures with other chemical molecules. The procedure for seed treatment was carried out using plastic bags (3 liters each) and the amount of seeds per treatment of 100 kg. A DIC-type experimental design with 9 treatments and 4 replications was adopted, under field conditions. The treatments were T1 (absolute control), T2 (pyrazole), T3 (imidacloprid + neonicotinoid), T4 (neonicotinoid), T5 (Bacillus amyloliquefaciens), T6 (neonicotinoid + pyrazole), T7 (neonicotinoid + lambdacyhalothrin), T8 (neonicotinoid + pyrazole + B. amyloliquefaciens) and T9 (anthranilamide + lambdacyhalothrin + avermectin). Baits with potatoes in the soil or evaluations through direct counting on the roots were the sampling types for the pest in question at 20, 30, 44, 60 and 90 DAP (days after planting). The samplings through evaluations in the roots of the plants to count the pest Scutigerella immaculata represented a greater number of individuals compared to the baits. For sampling through direct counting in the roots, T7 (neonicotinoid + lambdacyhalothrin) was the one that resulted in the lowest mean number of Scutigerella immaculata. The population increase of the pest was more pronounced from the interval between 60 and 90 DAP, in comparison with the samplings carried out at 20, 30 or 45 DAP. Bioinputs, such as bacteria-based microorganisms, may help IPM practices against Scutigerella immaculata, as presented here.