The western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an important, worldwide vector of two tospoviruses (Family Bunyaviridae; Genus Tospovirus), Impatiens necrotic spot virus (INSV) and Tomato spotted wilt virus (TSWV). In the Salinas Valley of California, INSV causes severe necrosis, stunting, and crop losses to lettuce (Lactuca sativa L.). Because broccoli (Brassica oleracea var. italica L.) and cauliflower (Brassica oleracea var. botrytis L.) are major rotation crops with lettuce in the Salinas Valley, it is critical to understand if these Brassicas influence the dispersal dynamics of F. occidentalis. In 2013 and 2014, surveys were conducted evaluating yellow sticky cards and plant samples in lettuce, broccoli, and cauliflower fields in three regions of the Salinas Valley. F. occidentalis were collected on sticky cards from April to November and on foliage in all three regions. Two-choice oviposition assays as well as no-choice and two-choice feeding assays were conducted where F. occidentalis adults were exposed to leaves of lettuce, broccoli, and cauliflower. A significantly greater number of eggs was found on lettuce than on broccoli or cauliflower leaves in the choice assay, whereas for the broccoli and cauliflower choice assay, the number of eggs retrieved was low and not significantly different between hosts. The number of F. occidentalis feeding spots and leaf area injury ratings were similar on broccoli and lettuce leaves but were significantly lower on cauliflower than on lettuce and broccoli leaves. The implications of these results on thrips and plant virus management are discussed.

中文翻译：

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西兰花和花椰菜能否影响加州萨利纳斯山谷西花蓟马（缨翅目：蓟马科）向生菜的扩散动态？


西花蓟马，Frankliniella occidentalis (Pergande)（缨翅目：蓟马科）是两种拓扑病毒（布尼亚病毒科；拓扑病毒属）、凤仙花坏死斑病毒 (INSV) 和番茄斑萎病毒 (TSWV) 的重要全球载体。在加利福尼亚州萨利纳斯山谷，INSV 会导致生菜 (Lactuca sativa L.) 严重坏死、发育迟缓和作物损失。由于西兰花 (Brassica oleracea var. italica L.) 和花椰菜 (Brassica oleracea var. botrytis L.) 是萨利纳斯山谷与生菜的主要轮作作物，因此了解这些芸苔属植物是否影响 F. occidentalis 的扩散动态至关重要。 2013 年和 2014 年，对萨利纳斯山谷三个地区的生菜、西兰花和花椰菜田中的黄色粘性卡和植物样本进行了调查评估。从 4 月到 11 月，在粘卡上和所有三个地区的叶子上收集 F. occidentalis。进行了两种选择的产卵测定以及无选择和两种选择的摄食测定，其中将西西兰花成虫暴露于生菜、西兰花和花椰菜的叶子。在选择测定中，生菜上发现的卵数量明显多于西兰花或花椰菜叶子上的卵，而对于西兰花和花椰菜选择测定中，回收的卵数量较低，并且宿主之间没有显着差异。西兰花和生菜叶子上的 F. occidentalis 取食点数量和叶面积损伤等级相似，但花椰菜上的显着低于生菜和西兰花叶子。讨论了这些结果对蓟马和植物病毒管理的影响。