摘要
为探索能影响云斑天牛Batocera horsfieldi行为反应的山核桃Carya cathayensis挥发物,采用活体植物动态顶空套袋吸附法收集不同受害状态(健康、天牛取食、天牛产卵和天牛钻蛀后)山核桃释放的挥发物,并运用气相色谱-触角电位测量系统(GC-EAD)及Y型嗅觉仪技术分析鉴定出对云斑天牛有电生理及行为反应的挥发物。结果表明:云斑天牛成虫对不同受害状态下山核桃挥发物中蒎烯、萜品烯、壬醛、α-萜品醇、五甲基苯、丙烯酸异辛酯、2,6-二甲基萘及正十六烷8种挥发物均产生电生理反应。嗅觉反应结果显示:萜品烯对云斑天牛雄成虫产生显著的引诱作用(P<0.05);壬醛对云斑天牛雌成虫产生极显著的引诱作用(P<0.01),对其雄成虫产生显著的引诱作用(P<0.05);而蒎烯对云斑天牛雌成虫产生极显著的驱避作用(P<0.01);α-萜品醇则对其雌成虫产生极显著的引诱作用(P<0.01),对其雄成虫产生显著的驱避作用(P<0.05)。研究结果说明:α-萜品醇和壬醛对云斑天牛雌成虫产生较强的引诱作用,而蒎烯对其雌成虫产生较好的驱避作用;萜品烯和壬醛对云斑天牛雄成虫产生较强的引诱作用,而α-萜品醇则对其雄成虫产生较好的驱避作用。图4表1参25
To explore the volatiles from the Carya cathayensis, which affect the behavioral response of the brown mulberry longhorn beetle, Batocera horsfieldi, and to provide a theoretical basis for screening plant-originated attractants or repellents of this insect. In the C. cathayensis of Lin'an Yayuan Village, 3 C. cathayensis trees were vandamly selected from different damaged states [healthy(ck), as well as feeding, oviposition and boring damage by longicorn beetle]. The volatiles were collected by using dynamic headspace adsorption living plants, and those causing electrophysiological and behavioral responses in B. horsfieldi were identified by gas chromatography-electrophysiological antennal detecting system(GC-EAD) and Y-tube olfactometer. Results showed that the B. horsfieldi adults had significant electrophysiological responses to eight volatiles of C.cathayensis volatiles with different damaged states, including(1 R)-(+)-alpha-pinene, g-terpinene, nonanal, α-terpineol, pentamethyl phenyl, 2-ethylhexyl acrylate, 2,6-dimethylnaphthalene and hexadecane. Female and male adults had the strongest electrophysiological responses to nonanal and α-terpineol followed. The olfactory reaction showed that g-terpinene had a significant attractivity to male adults of B. horsfieldi(P<0.05). Also nonanal had an highly significant attractivity to female adults(P<0.01) and a significant attractivity to male adults(P<0.05). Meanwhlie,(1 R)-(+)-alpha-pinene had an highly significant repellent activity to female adults(P<0.01). In addition α-terpineol had a highly significant attractivity to female adults(P<0.01), but a significant repellent activity to male adults(P <0.05). These results indicate that α-terpineol and nonanal showed strong attractivity to female adults of B. horsfieldi, while(1 R)-(+)-alpha-pinene showed good repellent activity, g-terpinene and nonanal showed strong attractivity to male adults, while α-terpineol showed good repellent activity. [Ch, 4 fig. 1 tab. 25 ref.]
引文
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