温室杏桑白蚧发生规律及防治技术研究

Study on the occurrence and control strategy of Pseudaulacaspis pentagona

桑白蚧在郑州地区温室杏树1年发生2-3代。温室杏桑白蚧的最佳用药时期在各代的卵孵化盛期至若虫扩散期,防治第1代若虫于4月上、中旬用24%果蔬利乳油160-240mg/L或24.5%阿维·机油乳油163.3mg/L喷雾;防治第2代若虫于6月中、下旬用24%果蔬利乳油160-240mg/L或48%乐斯本乳油480mg/L喷雾。防治雌成虫可在果树休眠期使用40%速扑杀乳油500-666.7mg/L喷雾。

Pseudaulacaspis pentagona Targioni has two or three generations each year on apricot trees grown in greenhouse in Zhengzhou area, Henan province. Practice proved the best time for insecticide spraying was at the majority eggs hatching and nymphae spreading stage. Avermectin ＋ chlorpyrifos 24EC 160-240 mg/L,or avermectin ＋ mineral oil 24.5EC 163.3 mg/ L was efficient and safe for spraying in early and middle April. When at the second nymphae spreading stage, Avermectin ＋ chlorpyrifos 24EC 160-240 mg/L or chlorpyrifos 48EC 480 mg/L could be used for control. When the trees are in dormancy, methidathion 40EC 500-666.7 mg/L would be recommended.