茯苓松蔸栽培白蚁防治及农残分析研究

Analysis and study of termite control and pesticide residue in the cultivation of Wolfiporia cocos on Pine root

通过气相色谱、液相色谱法对三种常用的防白蚁低毒农药氰戊菊酯、吡虫啉、毒死蜱的残留量检测分析,研究农药在茯苓松蔸栽培中对白蚁的防治效果。研究表明,施药后5d,观测的白蚁防治效果强弱依次为20%氰戊菊酯>48%毒死蜱>20%吡虫啉;施药30d、60d后,土壤中农残多寡依次为48%毒死蜱>20%吡虫啉>20%氰戊菊酯,在毒死碑和吡虫啉的施药组中茯苓皮的农残为0.22mg/kg和0.13mg/kg。综合分析白蚁防治效果及农残因素,三种农药中的20%氰戊菊酯(天鹰杀白蚁)适于茯苓松蔸栽培的白蚁防治。

The control effects of four commonly used low-toxicity insecticides,cyanovalerate,imidacloprid and chlorpyrifos on termites in the cultivation of Wolfiporia cocos on pine root were studied,and pesticide residues were investigated by gas chromatography and liquid chromatography.The results showed that the observed termite control intensity of effects were cy⁃anothrin,flufenitrile,chlorpyrifos and imidacloprid on 5 days after application.After 30 and 60 days of application,the pes⁃ticide residues amount in soil were chlorpyrifos,imidacloprid and cyanovalerate,and no pesticide residues were detected in poria cocos body.Toxic stelae and imidacloprid were detected in the skin of poria cocos and the contents were 0.22mg/kg and 0.13mg/kg respectively.Based on the comprehensive analysis of termite control effect and the factors of pesticide resi⁃dues,,valerate cyanothrin was the most suitable among the three pesticides for termite control with pine stump cultivation,and the pesticide residues in soil and Wolfiporia cocos products were the lowest.