触破式微胶囊农药的降解和残留及对天牛的药效

用HPLC法对触破式微胶囊农药的残留量及降解规律进行测定。结果表明 ,施药 45d后残留农药为本底值的 36.6% ,这与杨树天牛生测得到的规律完全吻合的 ,施药 38d生测时 ,光肩星天牛和黄斑星天牛的死亡率为 90 %。说明了触破式微胶囊农药具有残效期长、使用安全、杀虫效果好和对环境安全的特点 ,是防治天牛类害虫较为理想的农药剂型

Studies on Contacted-breaking Micro-capsule Pesticide Degradation,Residues and Effects on Poplar Long-horn Beetles

This paper deals with the pesticide residues and degradation determination of contacted breaking micro capsules by means of high pressure liquid chromatograph (HPLC). The degradation and residue determination results show that the residues of cypermethrin maintained above 30% within 45 days after being sprayed onto the barks of trees, correspondent with the biology test effect in the Northwest of China. According to the control test of poplar long horn beetles, in 38 days the contacted broken micro capsules could keep mortality to Anoplophora nobilis and A.glabripennis by 90 percent after being sprayed .These tests indicate that contacted broken micro capsules had some advantages ,such as longer effect duration and high resistance to environmental factors, especially prepared with synthetic pyrethroids.