低毒高效药剂对桃园梨小食心虫的防治效果研究

Study on the Control Effect of Low-toxicity and High-efficiency Pesticide against Grapholitha Molesta Busck in Peach Orchard

对大久保桃树在梨小食心虫的发生高峰期7月初、8月初,分别进行了48%毒死蜱乳油1 000倍液、2.0%甲氨基阿维菌素苯甲酸盐(甲维盐)1 000倍液2种低毒高效农药对桃园梨小食心虫的防治试验,采用添加了性诱剂的诱集器诱集害虫头数来反映防治效果,实验结果表明:喷施48%毒死蜱乳油1 000倍液、2.0%甲氨基阿维菌素苯甲酸盐(甲维盐)1 000倍液后,诱集到的梨小雄蛾比对照显著减少,说明这2种药剂对梨小食心虫的防治有一定的效果,其中,7月阿维菌素的效果好于毒死蜱,见效快,8月则毒死蜱效果好于阿维菌素,药效大约可以维持一周时间,建议在福州地区防治梨小食心虫需要交替或者多次打药防治效果更好。

In order to compare the control effects of different low-toxicity and high-efficiency pesticides,Dajiubao peaches were treated by 48% chlorpyrifos 1：1000 dilution or 2.0% emamectin benzoate 1：1000 dilution in the beginning of July and August respectively,which were the peak periods of Grapholitha molesta Busck.The control effects were evaluated by counting the captured pests amout in trapping ware with sex attractant.The results showed that the number of captured male Grapholitha molesta Busck treated by pesticides were less than the control remarkably,so chlorpyrifos and emamectin benzoate had some effects on controlling Grapholitha molesta Busck.The control effect of spraying emamectin benzoate in July was better than that of spraying chlorpyrifos.On the contrary,the effect of spraying chlorpyrifos in August was better than that of spraying emamectin benzoate and the efficacy would last one week.Therefore,pesticides alternation or multiple applications was suggested to control the Grapholitha molesta Busck in Fuzhou district.