삼림환경에 항공살포된 Cyfluthrin 과 Trichlorfon 의 물에서의 동태와 수서생물에 미치는 영향 = Originals : Fates of Cyfluthrin and Trichlorfon in Water and Their Impacts on Aquatic Organisms Following Aerial Application Over the Forest

다국어 초록 (Multilingual Abstract)

This study was conducted to evaluate the behavior in the water and the impact on aquatic organisms following aerial application of two insecticides in the forest, cyfluthrin and trichlorfon, to control the alder leaf beetle. As active ingredients, 25g of cyfluthrin and 536g of trichlorfon per ha were diluted seperately into 30L of tap water, and applied with a helicopter to the study areas. A model stream study was also conducted in a stream located adjacent to the study area in order to confirm the impact of insecticides on aquatic invertebrates. Cyfluthrin residues in water were 0.62㎍/L (1st. application) and 78㎍/L (2nd application) immediately after spraying. and decreased, to a non-detectable level after one day, while trichlorfon residue increased to 30.7㎍/L one day after spraying and fluctuated for 22th day depending on precipitation after spraying. Cyfluthrin application rapidly increased the number of some drifting aquatic invertebrates during 24-hour period immediately after spraying, but had no effects on the other aquatic organisms such as fish and zooplankton. The largest increase in the number of drifting organisms following application of cyfluthrin was shown by Ephemeroptera, and followed by Trichoptera, Coleoptera, and Diptera. However, trichlorfon little affected the number of drifting aquatic invertebrates and zooplankton population.