梨木虱药剂防治试验

目的]寻求高效低毒的药剂防治梨木虱。方法]观察了梨木虱的发生规律及为害情况,开展了实验室、田间药剂防治试验。结果]梨木虱在宿州地区1年发生6代,卵孵化盛期是梨盛花期,其发生与温度和降雨有密切关系。吡虫啉、阿维菌素和莫比朗乳油2 000倍液的田间药效很好,30 d后对梨木虱成虫的杀虫率仍在95.0%以上。吡虫啉、阿维菌素、莫比朗乳油的2 000倍液和速灭杀丁1 000倍液的田间药效很好,杀卵率在94.0%以上。600倍液苦.烟乳油和200倍液加德士敌死虫的实验室药效较好,对若虫的杀虫率达95.0%以上,田间药效与吡虫啉、速灭杀丁相当。结论]梨木虱成虫发生期首选吡虫啉、阿维菌素、莫比朗,若虫发生期首选苦.烟乳油、加德士敌死虫。

Experiment on Pesticide Control of Psylla pyrisuga

Objective] The purpose was to seek for pesticide with high efficiency and low toxicity for controlling Psylla pyrisuga.Method] The occurrence law and damage condition of P.pyrisuga were observed and the pesticide control experiments in laboratory and field were conducted.Result] In Suzhou area,P.pyrisuga had 6 generations a year and its full hatching rate of egg was full-bloom stage of pear and its occurrence had close relationship with temperature and rainfall.The field efficacies of imidacloprid,avermectin and 3% acetaniprid EC diluted 2 000 times were very good and their killing rates on P.pyrisuga adult after 30 d were also over 95.0%.The field efficacies of imidacloprid,avermectin,3% acetaniprid EC diluted 2 000 times and sumicidin diluted 1 000 times were very good and their killing rates on egg were over 94.0%.The efficacies in laboratory of bromadiolone EC diluted 600 times and Jiadeshi Disichong diluted 200 times were better,their killing rates on P.pyrisuga laver reached over 95.0% and their field efficacy was equal to that of imidacloprid and sumicidin.Conclusion] The first choices were imidacloprid,avermectin and 3% acetaniprid in the occurrence period of P.pyrisuga adult and bromadiolone EC and Jiadeshi Disichong in the occurrence period of its laver.