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本文通过网室害虫选择试验和苗圃调查 ,研究了杨树苗期主要害虫对杨树苗的选择性 ,得出如下结论 :1 )白杨翅蛾对白杨派树种选择性强 ,而对黑青杨派及其杂种选择性差 ;2 )青杨楔天牛嗜好黑青杨派及其杂种 ,不嗜好白杨派树种 ;3)白杨叶甲对白杨派树种危害较黑杨派及其杂种轻 ;4)柳 叶甲几乎危害所有参试树种 ,但危害白杨派树种较轻于黑杨派及其杂种树种 ;5 )白杨潜物 ,几乎危害所有参试树种 ;6 )杨直角叶蜂选择危害黑杨派及其杂种树种 ,仅危害少数叶片少毛的白杨派树种 ,且危害较轻 ;7)一点全钢 只选择白杨派嫩梢多毛树种。这些特性在苗圃经营中可加以应用 ,提高苗圃整体抗虫性。
In this paper, through the pest selection test and nursery investigation in the net house, the selectivities of poplar seedlings to the main pests of poplar seedling were studied. The conclusions are as follows: 1) The poplar wing moths are highly selective to Poplar trees, 3) Poplar leafhopper on poplar tree species than the black poplar and its hybrids light; 4) willow leaf almost Alhimantophoroidea and hybrids, do not like Poplar tree species; 3) Endangered all the tested tree species, but the harm to the Populus trees is lighter than the black poplar tree and its hybrid species; 5) Poplar, almost all the tested trees; 6) , Only endanger the few white-leafed hairy alba sent tree species, and less harmful; 7) a little steel only choose poplar to send young hairy species. These features can be used in nursery operations to improve the overall nursery insect resistance.