Abstract Trap cropping, in which a trap crop is planted near a cash crop, has been used successfully for reducing pest damage in some agricultural systems. We used a meta-analysis of extensive data on two trap cropping systems, diamondback moth, Plutella xylostella (Linnaeus), exploiting cabbage and Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) exploiting maize, to show that oviposition preference for, and high larval mortality on trap crops are important indicators of effectiveness of trap cropping systems. We then evaluated Indian mustard (Brassica juncea var. juncea L. Czern.) (Capparidales: Brassicaceae) and yellow rocket (Barbarea vulgaris W. T. Aiton) (Brassicales: Brassicaceae) as trap crops for protecting broccoli (Brassica oleracea var. italica Plenck) (Capparidales: Brassicaceae) against diamondback moth in Yuma, AZ, using planting configurations compatible with current practices for commercial production and without use of insecticides. In oviposition choice tests, both yellow rocket and Indian mustard were highly preferred over broccoli in the field. Furthermore, the number of larvae and pupae was significantly lower on yellow rocket and Indian mustard compared to broccoli, indicating relatively high mortality on these trap crops. Nevertheless, during the fall and spring growing seasons, no significant differences in the number of individuals on broccoli or proportion of broccoli crowns infested at harvest occurred between plots with trap crops relative to plots exclusively planted to broccoli. Thus, with the plant density and planting patterns used and without use of insecticides, there was no evidence that trap cropping was effective for reducing diamondback moth infestation of broccoli.

中文翻译：

---

在西兰花生产系统中控制小菜蛾（鳞翅目：小菜蛾科）的圈套作物评价

摘要 诱捕作物种植在经济作物附近，已成功用于减少某些农业系统中的害虫危害。我们对两种诱捕作物系统、小菜蛾、小菜蛾 (Linnaeus)、利用卷心菜和 Chilo partellus (Swinhoe)（鳞翅目：Crambidae）利用玉米的大量数据进行了荟萃分析，以显示产卵偏好和高幼虫诱捕作物的死亡率是诱捕种植系统有效性的重要指标。然后我们评估了印度芥菜 (Brassica juncea var. juncea L. Czern.) (Capparidales: Brassicaceae) 和黄色芥菜 (Barbarea vulgaris WT Aiton) (Brassicales: Brassicaceae) 作为保护西兰花 (Brassica oleracea var. italica Plenck) 的诱捕作物 ( Capparidales：十字花科）在亚利桑那州尤马对抗小菜蛾，使用与当前商业生产实践兼容的种植配置，并且不使用杀虫剂。在产卵选择测试中，黄色火箭和印度芥末在该领域都比西兰花更受欢迎。此外，与西兰花相比，黄色芝麻菜和印度芥菜的幼虫和蛹数量显着降低，表明这些诱捕作物的死亡率相对较高。然而，在秋季和春季生长季节，相对于仅种植西兰花的地块而言，种植诱捕作物的地块之间的西兰花个体数量或收获时被侵染的西兰花冠比例没有显着差异。因此，在使用和不使用杀虫剂的植物密度和种植模式下，