楝树是深受群众欢迎的四旁绿化树种,但是,近几年来,经常发生苗木和幼树的嫩叶皱缩,老叶花斑和顶梢停止生长的现象。1973年,我们通过调查和观察,发现是形似柑桔锈壁虱的害虫(暂名为楝树锈壁虱)为害所引起。当年7月下旬,我们在白泉公社光明大队山林队的苗圃里进行喷药试验。用乐果、敌敌畏、三硫磷等防治后第四天检查,该虫消失,顶梢 Neem tree is welcomed by the masses around the green tree species, however, in recent years, the emergence of seedlings and saplings of young folds, old leaves and tops of the top to stop the phenomenon of growth. In 1973, we found through investigation and observation that it was caused by the damage of the pests of the citrus rust tick (tentatively named as the neem rust tick). In late July of that year, we carried out the spraying test in the Nursery of the Brigade of White Springs Commune Bright Brigade. With dimethoate, dichlorvos, and other three days after the control of triphosphate check, the worm disappeared, the top shoot