河西地区不同杨树树种对杨十斑吉丁虫的抗性调查

Investigation on Resistance of Poplar to Melanophila decastigma Fabricus in the Hexi Corridor

毛白杨、新疆杨和钻天杨对杨十斑吉丁虫表现抗性，二白杨和小叶杨对该虫敏感；树干东、南面受害较重；树皮光滑及灌溉条件好者受害较轻。

Populus tomentosa,P. alba var pyramidalis and P. nigra var italica showed re-sistance to Melanophila decastigma Fabricus. P.simonii and P.gansuensis were susceptible tothe insect.Eastern and southern sides of trunk suffered more injury.The poplar with smoothbark and grown in good irrigation condition would develope better resistance.