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首页> 外文期刊>Biocontrol Science and Technology >Rate of consumption of Western flower thrips pupae by the soil-dwelling mite Hypoaspis sclerotarsa (Acari: Laelapidae)
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Rate of consumption of Western flower thrips pupae by the soil-dwelling mite Hypoaspis sclerotarsa (Acari: Laelapidae)

机译：西部花蓟马蛹的消费率，土壤 - 居住螨菌菌菌（Acari：Laelapidae）

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摘要

Western flower thrips (WFT), Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), are one of the most serious pests of horticultural crops worldwide. Despite one third of its lifecycle being in the soil, the potential for biological control of WFT in the soil is poorly understood and requires further elucidation. A number of studies report that polyphagous predatory mites prey on pupal stages of WFT in the soil, but little has been done on consumption rates. Therefore, we designed a laboratory study to examine the rate of consumption of WFT pupae in potting media, by the soil-dwelling mite Hypoaspis sclerotarsa (Costa). Five predator densities were evaluated (0, 2, 4, 6 and 8) against four densities of WFT prey (5, 10, 15 and 20 pupae). Pupal consumption was assessed at 2 hourly intervals over a six-hour period. The study confirmed that H.?sclerotarsa did consume WFT pupae and that the rate of consumption increased with increasing density of H.?sclerotarsa. The rate of consumption also increased with the density of WFT pupae. However, this was not consistent because, as the numbers of WFT pupae increased, so did the ratio of WFT pupae remaining to those consumed, increase. This paper is the first report of H.?sclerotarsa in Kenya, and of its potential as a biocontrol agent of WFT. Further studies are now needed to understand interaction of foliar and soil dwelling predatory mites (H.?sclerotarsa) for control of WFT under field conditions.
机译：西方花蓟马（WFT），Frankliniella occidentalis（Pergande）（Thysanoptera：Thripidae）是全球园艺作物最严重的害虫之一。尽管其生命周期中的三分之一在土壤中，但土壤中WFT的生物控制潜力较差，需要进一步阐明。许多研究报告说，土壤中WFT蛹阶段的多功能掠夺性螨虫，但少量对消费率进行了影响。因此，我们设计了一个实验室研究，以检查灌封介质的WFT Pupae消费速率，由土壤 - 居住的螨虫菌菌（Costa）进行了诱导媒体。评估五种捕食者密度（0,2,4,6和8），抵抗四种WFT猎物（5,10,15和20蛹）。在六小时内以2小时的间隔评估蛹消耗。该研究证实，H.?sclerotarsa确实消耗WFT Pupae，并且消费率随着H.?Sclerotarsa的密度的增加而增加。消费率也随着WFT Pupae的密度而增加。然而，这是不一致的，因为随着WFT Pupae的数量增加，WFT Pupae的比例仍然存在于消耗的人中，增加。本文是肯尼亚H.?sclerotarsa的第一个报告，其潜力作为WFT的生物防治。现在需要进一步的研究来了解叶面和土壤居住探测螨（H.Isclerotarsa）的相互作用在现场条件下对WFT的控制。

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