The rice stem borer, Chilo suppressalis (Walker), and the rice leaf folder, Cnaphalocrocis medinalis Guenée, are two of the most destructive lepidopteran pests in rice. Since these two pyralid insects overlap in their occurrence in rice paddy fields, farmers prefer to set their pheromone-baited traps together in the rice fields for their monitoring. However, our field observation demonstrated that no male adult of C. suppressalis was captured in traps baited with commercial sex pheromone of C. suppressalis (CCS) combined with commercial sex pheromone of C. medinalis (CCM). To confirm that the C. medinalis sex pheromone component(s) interfere with the attraction of males of the rice stem borers to their conspecific females, single components of C. medinalis sex pheromone combined with CCS in traps were tested in the laboratory and rice paddy field. The results revealed that the two alcohol components in CCM, i.e., (Z)-11-octadecen-1-ol (Z11-18: OH) and (Z)-13-octadecen-1-ol (Z13-18: OH) may cause a significant reduction in capturing C. suppressalis males caused by CCS. We recommend against using these sex pheromones together in the field and suggest that Z11-18: OH and Z13-18: OH could be potential inhibitors or antagonists of C. suppressalis sex pheromone to control the rice stem borer.

中文翻译：

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从另一种金字塔型稻虫Cnaphalocrocis medinalis（鳞翅目：Pyralidae）的性信息素中交配破坏Chilohibialis。

稻stem虫，Chilohibialis（Walker）和稻纵卷叶C Cnaphalocrocis medinalisGuenée，是稻米中最具破坏性的两种鳞翅目害虫。由于这两种吡咯类昆虫在稻田中的发生重叠，因此农民更喜欢在稻田中放置信息素诱集的诱集装置，以进行监测。然而，我们的实地观察表明，无成年男性二化螟是与商业性信息素诱饵捕获二化螟（CCS）与商业性信息素结合稻纵卷叶螟（CCM）。确认C. medinalis性信息素成分干扰稻stem虫雄性对其雌性的吸引，在实验室和稻田中对中线衣原体性信息素与CCS结合在诱捕器中的单一成分进行了测试。结果表明，CCM中的两个醇成分为（Z）-11-octadecen-1-ol（Z11-18：OH）和（Z）-13-octadecen-1-ol（Z13-18：OH）可能会大大减少CCS引起的捕获隐孢梭菌的捕获。我们建议不要在现场使用这些性信息素一起，建议Z11-18：OH和Z13-18：OH可能是潜在的抑制剂或拮抗剂二化螟性诱剂来控制二化螟。