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该文对宁夏新引进和原有的１４ 种杨树的生长及抗虫性进行了研究，发现欧洲山杨三倍体、截叶毛白杨等数种杨树，在一定的环境条件下，具有较好的相对抗虫性．并对其抗虫强度进行了排序．其抗虫性都优于新疆杨．
This paper studied the growth and insect resistance of 14 new poplar species introduced in Ningxia and found that Populus trichocarpa and Populus trichocarpa under poplar species under certain environmental conditions Better relative insect resistance. And its insect resistance intensity were sorted. Its insect resistance is superior to Xinjiang Yang.