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首页> 外文期刊>Journal of Plant Breeding and Crop Science >Seasonal incidence of Plutella xylostella (Lepidoptera: Plutellidae) and its associated natural enemies in major crucifer growing areas of Kenya
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Seasonal incidence of Plutella xylostella (Lepidoptera: Plutellidae) and its associated natural enemies in major crucifer growing areas of Kenya

机译：在肯尼亚主要十字花科植物产区的小菜蛾（鳞翅目：Plutellidae）及其相关天敌的季节性发病率

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摘要

Seasonal incidences of?Plutella xylostella,?diamondback moth (DBM) and its associated natural enemies were investigated in two agro-ecological zones of the major crucifer growing areas of Kenya in 2005 and 2006. DBM larvae and pupae were collected from the cabbage and kale crops grown in farmers’ field and maintained in the laboratory for the emergence of parasitoid or DBM. Four larval, one larval-pupal and one pupal parasitoid species were recorded from DBM. The parasitoids recovered wereDiadegma semiclausum,?Diadegma?mollipla, Itoplectis?spp.,?Cotesia plutellae, Apanteles?spp.,?Oomyzus sokolowskii?and?Brachymeria?species.?D. semiclausum?was the most dominant species throughout with highest parasitism rates of over 70% recorded in the highlands.?C. plutellae,?Apanteles?and?Brachymeria?were recovered from mid-altitude semi-arid areas. Generally, parasitism was significantly higher onBrassica oleracea?var.?capitata.?D. semiclausum?displaced the indigenous parasitoids from?B. oleracea?var.?capitata.
机译：2005年和2006年在肯尼亚主要十字花科植物种植区的两个农业生态区调查了小菜蛾，小菜蛾（DBM）及其相关天敌的季节性发病情况。从白菜和羽衣甘蓝中收集了DBM幼虫和p。农民田间种植的农作物，并在实验室中进行保养，以防出现寄生虫或DBM。从DBM中记录了4种幼虫，1种幼虫－pu和1种p类寄生虫。所回收的寄生虫是半球形的Diadegma，Diadegma，mollipla，Itoplectis？spp。，？Cotesia plutellae，Apanteles？spp。，？Oomyzus sokolowskii？和Brachymeria？种。在高原地区，半属是最主要的物种，寄生率最高，超过70％。从中高海拔半干旱地区回收了小菜蛾，A虫和臂足动物。通常，在甘蓝型油菜变种capitata.D上，寄生性明显较高。 Semiclausum取代了B的原生寄生虫。 oleracea？var。？capitata。

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