【摘要】 通过对我国北方地区89种主要栽培的林木、果树、花卉树种桑天牛株被害率和虫口密度调查、配合室内外试验、确定抗性序列。在我国北方地区。调查树种中对桑天牛高感虫树种12种；感虫树种2种；抗虫树种2种：高抗树种4种：免疫树种69种。更多还原

【Abstract】 The order of pest resistance to 89 species of main tree species in northern part of China wasdetermined by investigation of the infections rates of trees by Apriona germaru and the population densityof this pest. with the aid of the test in laboratory and in field from them. 4 highly resistant species, 2resistant species. 2 susceptible species and 12 highly susceptible species were screened out.更多还原