云南切梢小蠹对不同非寄主植物的嗅觉反应

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 g6∶g,1 g5∶g,2 g∶4 g,3 g3∶g,4 g∶2 g,5 g1∶g,6 g0∶g 7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,非寄主对云南切梢小蠹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 g2∶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 g0∶g）相比,其对云南切梢小蠹引诱率相差较小,最大相差14%。当云南松针与非寄主叶片以1 g∶5 g,2 g4∶g 2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。

Olfactory Responses of Tomicus yunnanensis to Different Non-host Plants

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.yunnanensis,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.yunnanensis.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 g∶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.