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Pesquisa Agropecuária Tropical

versão impressa ISSN 1517-6398versão On-line ISSN 1983-4063

Resumo

ZANTEDESCHI, Ronaldo et al. Selectivity of pesticides registered for soybean crop on Telenomus podisi and Trissolcus basalis. Pesqui. Agropecu. Trop. [online]. 2018, vol.48, n.1, pp.52-58. ISSN 1517-6398.  https://doi.org/10.1590/1983-40632018v4850348.

The use of pesticides in the soybean crop may impair the biological control, if the products are not selective to Telenomus podisi and Trissolcus basalis, which are important stink bug egg parasitoids. This study aimed to assess the selectivity of 15 pesticides registered for soybean crop on adults of T. podisi and T. basalis. Three laboratory bioassays were performed, totaling 18 treatments, in a completely randomized design, with four replications. The insecticides (g or mL of a.i.) imidacloprid + beta-cyfluthrin (0.25 + 0.03), deltamethrin (0.06), thiamethoxam + lambda-cyhalothrin (0.27 + 0.35), acephate (1.87) and fenitrothion (1.25) are harmful to both parasitoids species. Flubendiamide (1.20), diflubenzuron (2.00), Bacillus thuringiensis (0.08) and lufenuron (0.12) are innocuous to both parasitoids. The fungicides azoxystrobin + flutriafol (0.31 + 0.31), trifloxystrobin + prothioconazole (0.37 + 0.44), pyraclostrobin + metconazole (0.33 + 0.12) and trifloxystrobin + cyproconazole (0.94 + 0.40) are innocuous to T. podisi, but slightly harmful to T. basalis. The herbicides glufosinate ammonium salt (0.50) and glyphosate isopropylamine salt (1.20) are innocuous to both parasitoids.

Palavras-chave : Glycine max; biological control; chemical control; integrated pest management.

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