应用灭幼脲防治杨树天牛等害虫的研究

Application of Dimilin to Control Poplar Longhorn Beetles and Other Insects

杨树生长迅速,繁殖容易,适生范围广,为北方平原造林的主要树种,近年来已发展到长江中下游地区,已列为我国速生丰产林基地建设的重要树种。但各地栽植的杨树普遍遭到蛀干和食叶害虫的严重危害,在防治上,由于这两类害虫食性各异,为探索使用一种药剂既对人畜无害又可防治蛀干害虫兼治食叶害虫,我们于1986、1987。

Dimilin is a kind of anti-moulting pheromone, which does not harm to human beings, animals and the environment. Spray of 1 000 times Dimilin to control the adults of longhorn beetles in the emergence peroid on a large scale can reduce the amount of eggs by 21%, reduce the hatching rate by 26 % and reduce the number of young larvae by 55 %. Besides, the spray can also reduce the number of Clostera anachoreta and C. anastomosis etc. in the forest. One spray is valid for 20~30 days, which is economic and easy to carry out. Dosage for 1 ha is 300~450g and the expense for 1 ha is 9~10.5 yuan.