Abe Junichiro, Uefune Masayoshi, Yoneya Kinuyo, Shiojiri Kaori, Takabayashi Junji
Western Region Agricultural Research Center, National Agriculture and Food Research Organization, Fukuyama, Hiroshima, Japan.
Department Agrobiological Resources, Faculty of Agriculture, Meijo University, Nagoya, Aichi, Japan.
Environ Entomol. 2020 Feb 17;49(1):10-14. doi: 10.1093/ee/nvz140.
We characterized the correlation between the occurrences of diamondback moth, Plutella xylostella (L.), larvae and their dominant native parasitoid wasp, Cotesia vestalis (Haliday), in commercial greenhouses in a satoyama area, called Miyama, in Kyoto, Japan. In the three greenhouses used in this study, cruciferous 'mizuna' (Brassica rapa var. laciniifolia [Brassicales: Brassicaceae]) crops were grown. Pesticides against diamondback moth were not routinely applied in the greenhouses. We confirmed that populations of diamondback moth and C. vestalis were maintained on the wild crucifer plant Rorippa indica in the surrounding area from March to December. In the greenhouses, we observed several occurrences of diamondback moth larvae that were, in most cases, followed by occurrences of C. vestalis. We found that C. vestalis females were attracted by volatiles emitted from mizuna plants that were lightly infested with second-stadium diamondback moth larvae under laboratory conditions. The synchronous appearance of diamondback moth larvae and C. vestalis could be explained by the latter being attracted by the volatiles emitted from mizuna plants infested by diamondback moth larvae in the greenhouses.
我们对小菜蛾（Plutella xylostella (L.)）幼虫及其优势本土寄生蜂——菜蛾盘绒茧蜂（Cotesia vestalis (Haliday)）在日本京都一个名为宫山的里山地区商业温室中的发生情况之间的相关性进行了表征。在本研究使用的三个温室中，种植了十字花科的“水菜”（Brassica rapa var. laciniifolia [十字花目：十字花科]）作物。温室中未常规施用防治小菜蛾的农药。我们证实，从3月到12月，小菜蛾和菜蛾盘绒茧蜂的种群在周边地区的野生十字花科植物蔊菜（Rorippa indica）上得以维持。在温室中，我们观察到多次小菜蛾幼虫的出现，在大多数情况下，随后会出现菜蛾盘绒茧蜂。我们发现，在实验室条件下，菜蛾盘绒茧蜂雌蜂会被受到二龄小菜蛾幼虫轻度侵害的水菜植株释放的挥发物所吸引。小菜蛾幼虫和菜蛾盘绒茧蜂的同步出现可以解释为，后者被温室中受到小菜蛾幼虫侵害的水菜植株释放的挥发物所吸引。
