Integrated pest management of thrips (Thysanoptera-Thripidae) on British Columbia field crops

不列颠哥伦比亚省大田作物蓟马（缨翅目-蓟马科）害虫综合防治

• 批准号: 470326-2014
• 负责人: McGregor, Robert
• 金额: $ 1.81万
• 依托单位: Douglas College
• 依托单位国家: 加拿大
• 项目类别: Applied Research and Development Grants - Level 1
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=564081
• 关键词: Integrated; pest; management; thrips; Thysanoptera

Thrips are small insects that feed on a variety of agricultural crops and cause economic damage. Pest species like the western flower thrips (WFT), Frankliniella occidentalis, are serious pests of greenhouse-grown vegetables and flowers in British Columbia (BC) and elsewhere in Canada. Recently, problems have been reported with thrips on various field-grown crops in BC. Day-neutral strawberries produce fruit, not just during one fruiting period, but throughout the available growing season. Because day-neutral strawberry varieties are now grown more extensively in BC, strawberry flowers and fruits are susceptible to damage by thrips for a longer period and more damage is reported. Economic thresholds for WFT on strawberries are available from elsewhere in North America, but are not optimized for BC growers. In addition, no work has been done to determine the potential for using predatory insects for biological control of WFT on BC strawberries. In this project, laboratory and greenhouse trials will be done to develop a damage threshold for WFT on strawberries and to test the efficacy of biological control products on this pest. In addition to problems reported on strawberry, severe diebacks of potato plants have been recently observed in the presence of thrips. The dieback symptoms may be caused by Tomato Spotted Wilt Virus (TSWV) that is transmitted to plants by WFT, but the presence of TSWV in WFT has not been tested in BC populations. In this project, field-collected thrips and potato foliage will be tested for the presence of TSWV using DNA analysis. The research to be completed in this project will benefit pest management consulting companies by making their pest monitoring activities more precise. Increased precision in WFT management recommendations could result in reductions in the application of insecticide applications. Our work on WFT biological control could provide a more sustainable management strategy for this pest. Work to detect TSWV will aid in development of an explanation for thrips-associated diebacks in potato that have recently occurred.

蓟马是一种小型昆虫，以各种农作物为食，并造成经济损失。 害虫种类，如西部花蓟马（WFT），西花蓟马，是不列颠哥伦比亚省（BC）和加拿大其他地方温室种植的蔬菜和花卉的严重害虫。 最近，据报道，不列颠哥伦比亚省的各种田间作物上都有蓟马的问题。 白天中性的草莓不仅在一个果期结果实，而且在整个生长季节都结果实。 由于白天中性的草莓品种现在在不列颠哥伦比亚省种植得更广泛，草莓的花和果实在更长的时间内容易受到蓟马的损害，而且据报道损害更多。 草莓WFT的经济阈值可从北美其他地方获得，但不适合BC种植者。 此外，还没有进行任何工作来确定使用捕食性昆虫对BC草莓上的WFT进行生物防治的潜力。 在本项目中，将进行实验室和温室试验，以制定草莓上WFT的危害阈值，并测试生物防治产品对这种害虫的功效。除了草莓上报告的问题之外，最近还观察到在存在蓟马的情况下马铃薯植物的严重枯死。 枯梢症状可能是由WFT传播到植物的番茄斑萎病毒（TSWV）引起的，但WFT中TSWV的存在尚未在BC群体中进行过测试。 在本项目中，将使用DNA分析测试田间采集的蓟马和马铃薯叶片是否存在TSWV。 本项目完成的研究将使害虫管理咨询公司的害虫监测活动更加精确，从而使其受益。 提高WFT管理建议的精确度可能会减少杀虫剂的使用。 我们对WFT生物防治的研究可以为这种害虫提供一种更可持续的管理策略。 检测TSWV的工作将有助于解释最近发生的马铃薯中与蓟马相关的梢枯病。