Abstract
Acute toxicities of 42 pesticides to adult stage Aphidius gifuensis Ashmead were studied in the laboratory. Adult parasitoids were brought into contact with pesticide residues on glass plates, and the resultant mortalities were measured. Abamectin, chlorfenapyr, emamectin benzoate, malathion, nitenpyram, permethrin and spinosad caused 100 % mortality against the parasitoids and were categorized as seriously harmful based on the IOBC/WPRS guideline. Chlotianidin, dinotefran, imidacloprid, lepimectin, pyridaben, thiamethoxam and tolfenpyrad also had harmful effects on A. gifuensis adults with mortalities ranging from 30 to 99 %. Sitobion akebiae (Shinji) aphids mummified by A. gifuensis were dipped into 14 pesticide solutions, and the emergence of A. gifuensis adults was observed. Abamectin, malathion, thiamethoxam and tolfenpyrad had harmful effects on mummy stage A. gifuensis with mortalities >30 %.
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Acknowledgments
We thank Dr. K. Kohno (NARO Institute of Vegetable Tea Science) for reviewing an early draft. This work was supported by the Scientific Technique Research Promotion Program for Agriculture, Forestry, Fisheries and the Food Industry (Development of mass reproduction techniques of Aphidius gifuensis and its application to control vegetable pest aphids).
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Ohta, I., Takeda, M. Acute toxicities of 42 pesticides used for green peppers to an aphid parasitoid, Aphidius gifuensis (Hymenoptera: Braconidae), in adult and mummy stages. Appl Entomol Zool 50, 207–212 (2015). https://doi.org/10.1007/s13355-015-0323-1
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DOI: https://doi.org/10.1007/s13355-015-0323-1