印江杨树有害生物调查初报

A Preliminary Investigation on the Diseases and Pests of Poplars in Yingjiang Areas

对杨树有害生物进行专题调查,初步查清了杨树有虫害23种,分属5目15科,病害4种。调查表明,杨树虫害以云斑天牛等蛀干害虫危害最大,病害以杨叶锈病危害严重;三倍体毛白杨、响叶杨是抗病虫品种,意杨次之,沙杨、加杨是感病虫品种;混交林比纯林抗病虫;25 a以上杨树受害轻微。

A special investigation on the diseases and pests of Poplars in Yinjiang county was conducted. The result showed that there were 23 species of insect pests belonging to 15 families in 5 orders and 4 species of diseases. Among the insect pests the stem borer, Batocra hoafoeldi Hope, was of the highest risk, and among the diseases the leaf rust, Melampsora magnusiana Wagner, was the most serious. The triploid Populus tomentosa Carr and Populus adenopoda Maxim were pest and disease resistant species, and Populus euramericsna cv had moderate resistance, while Populus × canadensis Moench cv. Sacrau 79 and Populus Canadensis Moench were susceptible species. The resistance of mixed forests was higher than that of single forests. Old populus trees （ 〉 25 years） had been much lightly. damaged