| 王攀，侯晓钰，望勇，周利琳，杨帆，司升云,2023,豇豆荚螟在豇豆开花结荚期的为害及虫龄结构[J].环境昆虫学报,(3):822-827 |
| 豇豆荚螟在豇豆开花结荚期的为害及虫龄结构 |
| Infestation and instar distribution of Maruca vitrata during the flowering and pods formation stage of cowpea |
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| DOI： |
| 中文关键词: 豇豆荚螟 为害 分布 龄期 |
| 英文关键词:Maruca vitrata infestation distribution instar |
| 基金项目:武汉市农业科学院创新体系项目（CXZH202007；JCZX202101-2；JCZX202201-3） |
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| 中文摘要: |
| 本文采用五点取样法调查了豇豆荚螟Maruca vitrata Fabricius在武汉地区春豇豆开花结荚期的为害情况，并分析了幼虫分布的虫龄结构。结果表明，豇豆荚螟在豇豆开花结荚期对花的危害率显著高于豆荚；百花虫量和百荚虫量最高分别为65头和15头，分别位于盛花末期和盛荚中后期。花器中1龄幼虫比例显著高于3~5龄幼虫，而荚中4龄和5龄幼虫比例显著高于1~3龄幼虫。豇豆花不同部位的虫龄结构存在显著差异，如花药中的1龄幼虫比例显著高于3~5龄幼虫；花萼中1~3龄幼虫比例显著高于4龄和5龄幼虫；而子房中各龄期幼虫分布比例不存在显著差异。花萼中各龄期幼虫的比例均显著高于花药和子房。本研究明确了豇豆荚螟幼虫在豇豆开花结荚期的为害情况及虫龄结构，对于制定该虫的科学防控策略具有重要的指导意义。 |
| 英文摘要: |
| In this paper, we investigated the infestation of Maruca vitrata during the flowering and pods formation stage using a five-point sampling method and analyzed the instar distribution of larvae. The damage rate of M. vitrata on flowers was significantly higher than that of pods during the flowering and pods formation stage. The highest numbers of 65 and 15 insects per hundred flowers and pods, respectively, were located at the end of flowering and middle to late pods. The proportion of 1st instar larvae in the flowers was significantly higher than that of 3rd to 5th instars, while the pods were dominated by higher instar larvae, with the proportion of 4th and 5th instar larvae significantly higher than that of lower instars (1st to 3rd instars）. There were significant differences in the instar distribution of M. vitrata on cowpea flowers. The proportion of 1st instar larvae in anthers was significantly higher than that of higher instar larvae. The proportion of 1st to 3rd instar larvae in calyx was significantly higher than that of higher instar larvae (4th to 5th instar）. There was no significant difference in the proportion of all instars distributed in ovary. The proportion of larvae of all instars in the calyx was significantly higher than that in the anthers and ovaries. The results clarify the infestation and instar distribution of M. vitrata larvae during the flowering and pods formation stage of cowpea, which is an important guideline for scientifically formulate prevention and control strategies. |
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