降雨与食叶量对柞蚕绒茧蜂病药剂防治效果的影响试验

针对柞蚕绒茧蜂病的防治,进行了不同限制因子对防治药剂9901防治效果的影响试验。降雨对防治效果的影响:喷施0.25 mg/mL的9901可湿粉剂,3 h后降雨对防治效果没有影响,而喷药至降雨间隔1、2 h的防治效果分别为97.94%、97.73%,说明降雨对防治效果没有大的影响,确定喷药至降雨间隔1 h以上,不用二次补喷药剂。食药叶天数对防治效果的影响:用0.25 mg/mL的9901药液喷施柞叶,并保证柞蚕取食柞叶4 d以上,对柞蚕绒茧蜂病的防治效果可达95%以上,可以达到防治目的。

The Influence of Rainfall and Amount of Ingested Leaves to the Effect of Chemical 9901 on the Control of Apanteles sp.

In this paper,series of experiments were conducted to inspect the effects of chemicals with different limiting factors on the control of Apanteles sp.According to the results,rainfall at 3 hours after spraying 0.25 mg/mL 9901 wettable powder no negative effects on this chemical.when rainfall at one or two hours after spraying the efficiency of the chemical was 97.94% and 97.73% respectively,suggesting that rainfall has few effect on the chemical.It needn't re-spray if rainfall comes 1 hour or more after chemical spraying.The experiment made it clear that the control efficiency for Apanteles sp.can be 95% or more if the silkworms,Antheraea pernyi were fed with leaves sprayed with 0.25 mg/mL 9901 for more than 4 days.