降雨与食叶量对柞蚕绒茧蜂病药剂防治效果的影响试验

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

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。

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.