杀螟松在中山陵林区残留动态的研究

DYNAMIC STUDIES OF SUMITHION RESIDUES IN THE FOREST AROUND DR. SUN YATSEN' S MAUSOLEUM, NANJING

在飞喷后的林分内定期进行采样检测,以研究杀螟松在中山陵林区的残留动态。结果表明,喷洒后7～15天,除个别样品外,其残留都降低到0.5ppm以下,低于欧洲经济共同体法定容许量0.5ppm;喷洒后7天内,对林区内植物无损伤,鸟类没有出现任何异常现象。

3% sumithion was sprayed twice by a plane over the forest around Dr. Sun Yatsen's Mausoleum, Nanjing in 1987 to control Bursaphelenchus xylophilus. The total areas were 10800 mu and 11400 mu respectively. The use of sumithion was once criticised because of the environmental pollution caused and the harm to man and animals done by it. So the dynamic of sumithion residues in the forest around Dr. Sun Yatsen's Mausoleum was studied by collecting samples for determination at different time after spray. It turned out that the residues in samples Ⅰ-Ⅳ had been degraded below 0.5 ppm with very few except-ations 7-15 days later after the spray. This amount is much lower than that one lawfully permitted by European Economic Community. No injury was found to the plants and no abnormal phenomena to the birds during the seven days after the spray.