杀螟松防治麦蚜的研究

1983—1986年通过室内毒力测定比较,在20种供试农药中筛选出杀螟松对麦蚜具有很高毒力,田间试验和示范表明,小麦不同部位农药沉积量同药效呈正相关,杀螟松对小麦各部位的蚜虫均有良好防效。1985—1986年在京、冀、甘、川、豫等省示范和推广10多万亩,每亩用50％乳油30毫升,无论用高容量、低容量、超低容量或吹雾法喷雾,防效均在90％以上。杀螟松是我国正在发展的大吨位农药品种,具有防效好、药源广、成本低、对人畜安全、无残毒等优点。作者认为是值得推荐的防治麦蚜的农药品种。

CONTROL OF WHEAT APHIDS WITH FENITROTHION

The high insecticidal efficacy of fenitrothion to wheat aphids(mainly Sitobion avenae(F.) and Schisaphis graminum(Rond.)) has been revealed from 20 candidate pesticides under laboratory evaluation studies conducted in 1983-1986. Promising control of aphids at different parts of wheat plant could be achieved, and the efficacies were correlated with the deposition rate of fenitrothion. A total extension area of about 7000 ha in Hebei, Gansu, Sichuan, Henan Provinces and Beijing suburb during 1985-1986 have been treated with fenitrothion to control wheat aphids, under an application rate of 0.45 1/ha(50EC) and a control efficacy of higher than 90% was achieved with whatever spray methods, such as conventional sprayer, mist blower, low volume or ultra low volume application, were used. Considering that fenitrothion is a very promising insecticide and is going to be put into quantity production, it is suggested to be a good candidate aphicide on wheat.