Severe incidence of striped flea beetle, Phyllotreta striolata (Fabricius) (Coleoptera: Chrysomelidae) in radish is being reported from Delhi National Capital Region and Haryana. The larvae and adult of this species were found to damage both roots and leaves of radish, respectively. Overall there was an average 63.02 percent leaf infestation and 53.96 percent root infestation in the radish fields surveyed, which was above the economic threshold level (25% infestation). Infestation was also observed on other cruciferous crops like turnip, mustard, cabbage and cauliflower in National Capital Region and Haryana. In the present study, we have furnished the species diagnosis, sexual dimorphism, nature of damage and illustrations of various stages of the pest. DNA barcoding was employed to confirm the species identity and molecular phylogenetic studies based on mt CO I sequences from across the world showed that there were two clusters; the Old World and the New World. The biology of the pest and the importance of studies on area specific population dynamics for formulating management strategies are discussed.

中文翻译：

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一种新兴的萝卜害虫，条纹跳蚤甲虫 Phyllotreta striolata (Fabricius)，来自印度北部：发病率、诊断和分子分析

据报道，德里国家首都地区和哈里亚纳邦的萝卜中条纹跳蚤甲虫 Phyllotreta striolata (Fabricius)（鞘翅目：Chrysomelidae）的发病率很高。发现该物种的幼虫和成虫分别损害萝卜的根和叶。总体而言，调查的萝卜田平均有 63.02% 的叶子侵染和 53.96% 的根侵染，高于经济阈值水平（25% 侵染）。在国家首都地区和哈里亚纳邦的萝卜、芥菜、卷心菜和花椰菜等其他十字花科作物上也发现了感染。在本研究中，我们提供了害虫不同阶段的物种诊断、性二态性、损害性质和插图。DNA条形码用于确认物种身份，基于来自世界各地的mt CO I序列的分子系统发育研究表明有两个簇；旧世界和新世界。讨论了害虫的生物学特性以及研究特定区域种群动态对制定管理策略的重要性。