Stevenson B J, Cai L, Faucher C, Michie M, Berna A, Ren Y, Anderson A, Chyb S, Xu W
CSIRO Ecosystem Sciences, Black Mountain, ACT 2601, Australia (
Plant Biosecurity Cooperative Research Centre, Bruce 2617, Australia (
J Econ Entomol. 2017 Jun 1;110(3):1351-1358. doi: 10.1093/jee/tox051.
The red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), is a worldwide pest of stored grains. Using "Y"-tube olfactometry we studied the response of T. castaneum to odors from simulated wheat infestations containing conspecifics, and infestations containing the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae), and the granary weevil Sitophilus granarius (L.) (Coleoptera: Curculionidae). Tribolium castaneum larvae were significantly attracted to odors from all three test species. Tribolium castaneum adults were attracted to grains infested by R. dominica and flour infested by T. castaneum but repelled from grains infested by S. granarius. Further behavioral analysis with pheromones showed that T. castaneum were significantly attracted to their aggregation pheromone, dimethyldecanal (DMD), but not to the R. dominica aggregation pheromone, a mixture of dominicalure 1 and 2. Female T. castaneum adults were attracted to ∼50-fold less DMD than larvae and 100-fold less than male adults, suggesting they are more sensitive to DMD. This study improves our understanding of T. castaneum behaviors to infested grain volatile compounds and pheromones, and may help develop new control methods for grain pest species.
赤拟谷盗（Tribolium castaneum (Herbst)，鞘翅目：拟步甲科）是一种世界性的储粮害虫。我们使用“Y”型嗅觉仪研究了赤拟谷盗对来自含有同种个体的模拟小麦侵染、含有谷蠹（Rhyzopertha dominica (F.)，鞘翅目：长蠹科）的侵染以及含有谷象（Sitophilus granarius (L.)，鞘翅目：象甲科）的侵染所产生气味的反应。赤拟谷盗幼虫对来自所有三个测试物种的气味都有显著的趋向性。赤拟谷盗成虫被谷蠹侵染的谷物和赤拟谷盗侵染的面粉所吸引，但对谷象侵染的谷物有排斥反应。使用信息素进行的进一步行为分析表明，赤拟谷盗对其聚集信息素二甲基癸醛（DMD）有显著的趋向性，但对谷蠹的聚集信息素（dominicalure 1和2的混合物）没有趋向性。雌性赤拟谷盗成虫对DMD的敏感性约为幼虫的1/50，雄性成虫的1/100，这表明它们对DMD更敏感。这项研究增进了我们对赤拟谷盗对受侵染谷物挥发性化合物和信息素行为的理解，并可能有助于开发针对谷物害虫物种的新控制方法。
