ABSTRACT The parasitoid Peristenus relictus was established in California to help regulate Lygus species. This study surveyed the San Joaquin Valley and South Coast of California to determine this parasitoid’s current southern geographic range. Peristenus relictus recoveries were made in all sampled counties, including Santa Barbara and Ventura along the coast, and Tulare, Kings and Kern inland. Parasitism was notably high in Santa Barbara County, where 61.7% of Lygus nymphs collected from weedy plants were parasitised. However, as parasitism was scarce in the San Joaquin Valley (0–12.5%), future research should examine possible inhibitors (e.g. climate) of this biological control.

中文翻译：

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记录加利福尼亚州引入的寄生蜂 Peristenus relictus（膜翅目：茧蜂科）的南部范围扩大

摘要 寄生蜂 Peristenus relictus 在加利福尼亚建立以帮助调节 Lygus 物种。这项研究调查了加利福尼亚州的圣华金河谷和南海岸，以确定这种寄生物目前的南部地理范围。Peristenus relictus 回收在所有采样县进行，包括沿海的圣巴巴拉和文图拉，以及内陆的图莱里、国王和克恩。圣巴巴拉县的寄生率特别高，从杂草植物中收集的天蛾若虫中有 61.7% 被寄生。然而，由于寄生在圣华金河谷（0-12.5%）很少，未来的研究应该检查这种生物控制的可能抑制剂（例如气候）。