[Objective ] With Cupressustorulosa, Cinnamomum camphora and Cyclobalanopsis oerst as test materials, the paper studied the effects of different non-host plants on olfactory responses of Tomicus yunnanensis. [ Method] The pine needles of Pinus yunnanensis were mixed with the leaves of Cupressustorulosa, C. camphora and C. oerst according to the ratios of 0 g:6 g,1 g:5 g,2 g:4 g,3 g:3 g,4 g:2 g,5 g:1 g and 6 g:0 g, and the mixtures were put in the response arm of Y-tube olfactometer as odor source to observe the olfactory behavior of T. yunnanen-sis, the empty arm was set as control. [Result] When the ratio of non-host plants was relatively small in mixed leaves, non-host had less impact on olfactory responses of T, yurmanensis. As the proportion of non-host leaves gradually increased, the inducement rate of leaf mixtures on T. yunnanensis was gradually small. When the pine needles -of P. yunnanensis were mixed with non-host leaves according to the ratio of 1 g: 5 g and 2 g:4 g, they had less difference in inducement rate on T. yunnanensis compared with complete pine needles (ratio: 6 g:0 g) , and the maximum difference was 14%.When the pine needles of P. yunnanensis were mixed with non-host leaves according to the ratio of 1 :5 g, 2 g:4 g, the inducement rate on T. yunnanensis decreased compared with complete pine needles(ratio: 6 g:0 g) , and the decrease value in maximum was 40%. [ Conclusion ] The results could provide reference for determination of mixed ratio in construction of mixed forest and the development of botanical attractant and repellent of T. yunnanensis.%[目的]以藏柏、樟树、滇青冈为试材,研究不同非寄主植物对云南切梢小蠹嗅觉行为的影响.[方法]将云南松针与藏柏、樟树、滇青冈等非寄主植物叶片配成0 g:6 g,1 g:5 g,2 g:4 g,3 g:3 g,4 g:2 g,5g:1 g,6 g:0 g7种比例置于“Y”型嗅觉仪反应臂中作为气味源,对照臂为空白,观察云南切梢小蠹的嗅觉反应.[结果]研究结果可为混交林营造中混交比例的确定、云南切梢小蠹植物源引诱剂和驱避剂的开发提供借鉴.当非寄主在混合叶片中的比例较小时,非寄主对云南切捎小蠢的嗅觉行为影响较小.随着非寄主叶片所占比例的逐渐增大,叶片混合物对云南切梢小蠹的引诱率越来越小.云南松针与非寄主叶片以4 g:2 g,5 g:1 g 2种比例混合时,与混合叶片中全为云南松针(云南松针与非寄主叶片比例6 g:0 g)相比,其对云南切捎小蠢引诱率相差较小,最大相差14％.当云南松针与非寄主叶片以1 g:5 g,2 g:4 g2种比例混合时,与混合叶片中全为云南松针相比,对云南切梢小蠹的引诱率下降,下降最大值为40％.[结论]研究结果可为混交林营造中混交比例的确定、云南切梢小蠹植物源引诱剂和驱避剂的开发提供借鉴.
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