三种新型微胶囊防治桑天牛成虫的试验研究

THREE NEW SPECIES OF MICROCAPSULATION CONTROLLING ADULTS OF APRIONA GERMARI (HOPE)

桑天牛是杨树黑杨派无性系树种的重要蛀干害虫之一,成虫必须在桑、构树上进行补充营养才能完成其生活史。研制溴氰菊酯、氰戊菊酯及杀螟松等三种微胶囊剂在成虫羽化期喷洒于桑、构树上毒杀成虫,雨季残效均在15天以上;无雨时溴氰菊酯、氰戊菊酯微胶囊长达30天以上,杀螟松微胶囊可达15天,均比相应的乳油要好。

Apriona germari is one of the important stem boreres of clones of the Aigeiros poplars. The biological character of the adult shows that it has to feed on the bark of branches of the mulberry or paper mulberry to complete its life cycle. Three kinds of microencapsulated Decamethrin, Fenvalerate and Sumithion had been developed to spray on the mulberries during the emergence of the adults. Their residual effects maintained more than 15 days in the rainy season. Microencapsulated Decamethrin, Fenvalerate maintained more than 30 days and Sumithion microencapsule maintained 15 days in the rainless region. The results of these microencap-sules are better than their corresponding emulsions.