Abstract

The western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) is an important pest that transmits tospoviruses such as Tomato spotted wilt virus. Jasmonate (JA) and its derivatives are phytohormones with essential roles in plant defense against herbivorous arthropods. In experiments conducted over 2 years, we evaluated how spraying with prohydrojasmon (PDJ), a JA derivative, affected F. occidentalis infestations of greenhouse-grown tomato plants. Single or consecutive sprayings of 400 nmol/mL PDJ in the early plant growth stage significantly suppressed thrips infestation and feeding damage as well as spinetoram. Although spraying with PDJ slightly inhibited initial plant growth, fruit yields and quality were not affected. These results suggest that PDJ could be practically used as a repellent to control F. occidentalis infestation and primary tospovirus infection in commercial tomato greenhouses.

摘要

西部花蓟马，Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) 是一种重要的传播番茄斑枯病病毒等tospoviruses 的害虫。茉莉酸 (JA) 及其衍生物是植物激素，在植物防御草食性节肢动物方面具有重要作用。在 2 年多的实验中，我们评估了喷洒 JA 衍生物 prohydrojasmon (PDJ) 如何影响F. occidentalis温室种植的番茄植物的侵扰。在植物生长早期单次或连续喷洒 400 nmol/mL PDJ 可显着抑制蓟马侵染和摄食损害以及多杀菌素。尽管喷洒 PDJ 对植物初期生长有轻微抑制作用，但果实产量和品质并未受到影响。这些结果表明，PDJ 可以实际用作驱虫剂来控制商业番茄温室中的西洋镰刀菌侵染和原发性tospovirus感染。