3种农药树干注射法防治荔枝蝽象在荔枝树叶中的残留分布

目的]探讨吡虫啉、杀虫双和敌百虫3种农药树干注射法防治荔枝蝽象的可行性。方法]采用树干注射法进行施药,研究吡虫啉、杀虫双、敌百虫3种药剂防治荔枝蝽象在荔枝树叶中的残留分布。结果]吡虫啉和敌百虫能快速分布到树干中,杀虫双则缓慢在树干中分布;农药持续时间长,敌百虫残留时间最长,9 d后残留量仍高达0.312 mg/kg,吡虫啉次之,9 d只有0.015 mg/kg,杀虫双最差。结论]该法防治药效长,污染小,几乎不杀伤天敌,不受天气影响,可在生产中推广应用。

Residual Distribution of Three Kinds of Pesticides in Litchi Leaves by Trunk Injection to Control Tessartoma papollosa Drury

Objective] The aim was to explore feasibility of pesticides imidacloprid,bisultap and dipterex by trunk injection law to prevent and control of Tessaratoma papillosa.Method] We studied the residual distribution of three kinds of pesticides like imidacloprid,bisultap and dipterexin litchi leaves by trunk injection to control Tessartoma papollosa Drury.Result] The imidacloprid and dipterex could quickly distribute to the tree trunk,bisultap slowly distributed in the trunk;pesticide lasted for a long time,trichlorfon residues for the longest time,after 9 days still had as high as residues of 0.312 mg/kg;secondly was imidacloprid,and the residue was only 0.015 mg/kg in 9 days;bisultap was the worst.Conclusion] The method has long time effect,little pollution,almost does not kill natural enemy,does not affect by the weather,so it can be applied in the production.