In this study, potential banker plant systems against the cabbage whitefly Aleyrodes proletella Linnaeus (Hemiptera: Aleyrodidae) were developed under controlled conditions. The two most promising banker plant systems, that is, the parasitoid Encarsia tricolor Förster (Hymenoptera: Aphelinidae) either with Aleyrodes lonicerae Walker on European columbine (columbine system) or with Trialeurodes vaporariorum Westwood (Hemiptera: Aleyrodidae) on Hokkaido squash (pumpkin system), were further evaluated in the field. Although the pumpkin system produced three times more parasitoids than the columbine system, both banker plants led to an 1.5‐fold increase in A. proletella parasitism rates. However, only the pumpkin system increased the abundance of syrphid larvae on cabbage by 61.5% and reduced A. proletella populations on average by 4.4%–25.8% depending on the respective assessment date. In conclusion, the pumpkin system revealed to be a promising (supplementary) control measure against A. proletella. Options for further improvement and standardization of the pumpkin system as well as a potential implementation in cabbage production are discussed.

中文翻译：

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Banker 植物促进功能性生物多样性并减少白粉虱 Aleyrodes proletella 的数量

在这项研究中，在受控条件下开发了针对白粉虱 Aleyrodes proletella Linnaeus（半翅目：Aleyrodidae）的潜在银行家植物系统。两个最有前途的银行家植物系统，即寄生蜂 Encarsia tricolor Förster（膜翅目：Aphelinidae），或者与欧洲鸽（鸽系统）上的 Aleyrodes lonicerae Walker 或北海道南瓜系统上的 Trialeurodes vaporariorum Westwood（半翅目：Aleyrodidae）（ ，在该领域进行了进一步评估。尽管南瓜系统产生的拟寄生物比 columbine 系统多三倍，但两种银行家植物都导致 A. proletella 寄生率增加了 1.5 倍。然而，只有南瓜系统才使卷心菜上的紫蛉幼虫丰度增加了 61.5%，并使 A. proletella 种群平均减少了 4.4%–25。8% 取决于相应的评估日期。总之，南瓜系统被证明是一种有希望的（补充）控制措施来对抗 A. proletella。讨论了进一步改进和标准化南瓜系统的选项以及在卷心菜生产中的潜在实施。