不同杀虫剂对水稻稻纵卷叶螟的田间防治药效评价

以水稻品种盐丰47为材料，研究了3％甲氨基阿维菌素苯甲酸盐水乳剂、40％毒死蜱乳油、40％丙溴磷乳油和80％杀虫单可溶性粉剂4种杀虫剂不同浓度处理对稻纵卷叶螟的田间防治效果。结果表明：4种供试杀虫剂的速效性和持效性均较好，对水稻稻纵卷叶螟具有较好的防治效果。施药后10d，3％甲氨基阿维菌素苯甲酸盐水乳剂9、12和15g／hm^2，40％毒死蜱乳油470和520g/hm^2，40％丙溴磷乳油480和500g／hm^2的防效均〉80％；80％杀虫单可溶性粉剂650g／hm^2的防效达76．8％。但是4种药剂中只有3％甲氨基阿维菌素苯甲酸盐水乳剂毒性较低，更有利于可持续性无公害农业的发展，应用前景较好。

Efficacy of Four Pesticides on Cnaphalocrocis medinalis Guenee on Rice

Using rice variety Yanfeng 47 as the material,the field efficacy of 3% emamection-benzoate EW,40% chlorpyrifos EC,40% profenofos EC and 80% monosultap WP on controlling Cnaphalocrocis medinalis Guenee were studied.The results showed that the fast action,persistence and control efficacy of the four pesticides were better.Ten days after spraying,the control efficacy of 3% emamection-benzoate EW with dosage of 12 g/hm2,40% chlorpyrifos EC with dosage of 470 g/hm2,40% profenofos EC with dosage of 480 g/hm2 were above 80%,and that of 80% monosultap WP with dosage of 650 g/hm2 reached 76.8%.3% emamection-benzoate EW had a low toxicity,which was more conducive to the development of sustainable and pollution-free agriculture,and the application prospects was better.