Abstract: [Objective and Method]The host preferences of T. turkestani to different cotton varieties in Xinjiang were studied.[Result]The results showed that the host preferences of T. turkestani to eighteen cotton varieties had significant difference. T. turkestani was not attracted evidently by Xinhai 21 but attracted strongly by 297-5, 81-3. On this basis, six varieties were selected for biochemical test, that indicated that there was no significant correlation between host preferences of T. turkestani.[Conclusion]The higher the content of leaf wax,cotton phenol and brassis ,the weeker the preference of T. turkestani is;the higher the content of tannin is,the stronger the preference of T.turkestani to the variety is;the higher the chlorophyll content the variety has ,the less injury it suffers.

摘要： [目的]利用叶螨对不同品种的选择性,综合防治棉叶螨.[方法]将土耳其斯坦叶螨对新疆棉花主栽品种(系)的寄主选择性进行评价.[结果]土耳其斯坦叶螨对棉花18个不同品种(系)寄主选择性存在显著差异,对新海21号选择性最弱;对297-5、81-3等的选择性较强.在此基础上筛选出6个供试品种进行形态学、生化特性测定.[结论]叶片茸毛,可溶性糖含量与叶螨选择寄主无显著相关性;叶片蜡质、棉酚、黄酮含量越高,土耳其斯坦叶螨对其选择性越弱;单宁含量高,叶螨对该品种选择性越强;品种叶绿素含量越高,受螨害就越轻.