Brassicaceous leafy greens are an important crop for small growers but are difficult to produce due to damage by flea beetles. Flea beetles are problematic for growers as they chew many small holes through leaves rendering produce unmarketable. We tested the efficacy of several essential oils, the woven-mesh row cover ProtekNet, and the spunbonded row cover Agribon, compared to organic and conventional insecticides and no spray controls in the spring and fall of 2019. We found that the two row cover treatments (Agribon and ProtekNet) provided the best control of flea beetles and associated damage. Thyme oil was highly phytotoxic and killed the crop entirely and rosemary and neem essential oils caused mild phytotoxic burns. Organic insecticides rarely performed better than the no spray control. While conventional insecticides controlled most flea beetles, the crop was often still too highly damaged to sell. The results of our study suggest row covers offer producers an effective method of flea beetle control that reduces their dependence on insecticides for conventional and organic production.

中文翻译：

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植物精油和细筛网覆盖物对黄铜科蔬菜生产中的甲壳虫（金龟科）管理的影响

十字花科绿叶蔬菜是小型种植者的重要农作物，但由于跳蚤甲虫的损害而难以生产。跳蚤甲虫对种植者是有问题的，因为它们会通过叶片咀嚼许多小孔，使产品无法销售。与有机和常规杀虫剂相比，我们测试了几种精油，编织网状排毒ProtekNet和纺粘型排毒Agribon的功效，并且在2019年春季和秋季没有喷雾控制。我们发现两种排毒治疗（Agribon和ProtekNet）提供了对跳蚤甲虫和相关损害的最佳控制。百里香油具有很高的植物毒性，可完全杀死农作物，迷迭香和印essential香精油可引起轻度的植物毒性灼伤。有机杀虫剂的性能很少优于无喷雾控制。尽管传统的杀虫剂控制了大多数跳蚤甲虫，但农作物经常仍然受到严重破坏而无法出售。我们的研究结果表明，行覆盖物为生产者提供了一种有效的跳蚤甲虫控制方法，可减少常规和有机生产中对杀虫剂的依赖性。