깔따구(Chironomus riparius)와 조각깔따구(Glyptotendipes tokunagai)에 대한 Buprofezin 급성독성 평가
Assessment of Acute Toxicity of Buprofezin to Chironomus riparius and Glyptotendipes tokunagai
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초록
Buprofezin is a thiadiazine insecticide that functions as an insect growth regulator, exerting its insecticidal effect by inhibiting chitin biosynthesis. In Korea, it is commonly used as a pesticide to control planthoppers, greenhouse whiteflies, and scale insects on various crops. Despite its low water solubility, buprofezin has a high affinity for soil particles and can accumulate in sediments within aquatic environments, posing a potential risk to non-target aquatic species. This study evaluated the acute toxicity of buprofezin on two species: the OECD standard species Chironomus riparius and the native species Glyptotendipes tokunagai. Acute toxicity tests were conducted following OECD guideline 235, and median lethal concentrations (LC50) were calculated using the US EPA probit analysis software. The results showed a 24-hour LC50 of 1.587-2.560 mg/L and a 48-hour LC50 of 0.471-1.421 mg/L for C. riparius, while G. tokunagai demonstrated higher sensitivity, with a 24-hour LC50 of 0.679-1.143 mg/L and a 48-hour LC50 of 0.536-0.936 mg/L. These findings suggest that both C. riparius and the native G. tokunagai are suitable species for assessing pesticide risk in aquatic environments.
Abstract
Buprofezin is a thiadiazine insecticide that functions as an insect growth regulator, exerting its insecticidal effect by inhibiting chitin biosynthesis. In Korea, it is commonly used as a pesticide to control planthoppers, greenhouse whiteflies, and scale insects on various crops. Despite its low water solubility, buprofezin has a high affinity for soil particles and can accumulate in sediments within aquatic environments, posing a potential risk to non-target aquatic species. This study evaluated the acute toxicity of buprofezin on two species: the OECD standard species Chironomus riparius and the native species Glyptotendipes tokunagai. Acute toxicity tests were conducted following OECD guideline 235, and median lethal concentrations (LC50) were calculated using the US EPA probit analysis software. The results showed a 24-hour LC50 of 1.587-2.560 mg/L and a 48-hour LC50 of 0.471-1.421 mg/L for C. riparius, while G. tokunagai demonstrated higher sensitivity, with a 24-hour LC50 of 0.679-1.143 mg/L and a 48-hour LC50 of 0.536-0.936 mg/L. These findings suggest that both C. riparius and the native G. tokunagai are suitable species for assessing pesticide risk in aquatic environments.
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