豆荚野螟对豇豆不同器官的产卵选择性研究

豆荚野螟对寄主不同器官具有产卵选择行为,已有的产卵选择性研究尚未明确豆荚野螟对寄主花、蕾以及其他器官的产卵选择性差异。本研究调查了盛花初期和盛花期豇豆花、蕾、茎尖、叶片和豆荚上豆荚野螟的卵粒分布情况,在此基础上设计室内豆荚野螟对盛花期豇豆器官的产卵选择性试验。结果表明,有54.1%的卵粒分布在盛花期的豇豆蕾上,并且蕾上的平均卵量显著高于花、茎尖、豆荚和叶片上的卵量。本研究结果证实了豆荚野螟对寄主不同器官具有显著的产卵选择性,进一步明确了豆荚野螟偏好于在寄主蕾上产卵的特性,为豆荚野螟的综合治理提供了理论指导。

Oviposition preference of Maruca vitrata (Lepidoptera: Crambidae) in different organs of cowpeas, Vigna unguiculata

Maruca vitrata lays eggs selectively in different organs of the host plant, and the difference of oviposition preference among flower, bud and other organs is still unclear. In this study, we investigated the distribution of eggs in the cowpea flower, bud, shoot tip, leaf and bean pod in the early flowering stage and flowering stage, and designed an oviposition preference experiment. The results showed that 54.1% of total eggs distributed on the bud in the flowering stage, and the average eggs on the bud were significantly higher than that on the flower, shoot tip, bean pod and leaf. In this study, we confirmed that M. vitrata had different oviposition preferences on different organs of the host plant. We further clarified that M. vitrata preferred to lay eggs on the bud than on other organs, which provides the theoretical guidance for integrated management of M. vitrata.