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首页> 外文会议>5th International Workshop on Management of the Diamondback Moth and Other Crucifer Insect Pests(第五届小菜蛾及其他十字花科蔬菜害虫治理国际研讨会) >Diversity,distribution and role of wild crucifers in major cabbage and kale growing areas of Kenya
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Diversity,distribution and role of wild crucifers in major cabbage and kale growing areas of Kenya

机译：肯尼亚主要白菜和羽衣甘蓝种植区野生十字花科植物的多样性，分布和作用

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Species diversity,distribution and role of wild crucifers on DBM and its parasitoids were explored in repeated surveys in four major crucifer-growing areas of Kenya. Thirty fields were selected at each site and presence of wild crucifers within fields and in the surrounding area were recorded quarterly for one year.Presence of DBM larvae and pupae was evaluated and all specimens taken to the lab for parasitoid emergence.Eleven species of wild crucifem in nine genera were collected.Vegetation richness,diversity and evenness varied with season and location.Cabbage growing areas had significantly higher species richness(＞5.25)than kale growing areas(0.75).DBM was recorded from five species；Raphanus raphanistrum was the most preferred(1.22 and 0.99 DBM/plant in Naro Moru and Kinangop,respectively). The parasitoid fauna comprised of six species. Temporal and spatial niche separation was observed with Apanteles sp.and Brachymeria sp.collected only from Erucastrum arabicum in Athi River.Diadegma semiclausum was the most prevalent parasitoid （25.7％and 22.4％parasitism on R.raphanistrum in Kinangop and Naro Moru,respectively),followed by Diadegma moUipla(16.9％in Athi River). The Shannon Diversity Index of parasitoid species(0.87)and species evenness(1.05)was highest on E.Arabicum in the mid-altitude semi-arid areas of Athi River.Species richness was also higher in kale growing areas.We conclude that wild cmcifers in the field act as alternative hosts for diamondback moth. They provide refuge to the pest and its parasitoids in the absence of cultivated crops and help in recolonization of cultivated crops by parasitoids. They also act as potential refuge to the parasitoids and aid in recolonisation of the crop after local extinction due to pesticide application.
机译：在肯尼亚四个主要十字花科植物种植区的重复调查中，探索了野生十字花科植物对DBM及其寄生物的物种多样性，分布和作用。在每个地点选择了30个田地，并每季度记录田地和周围地区野生十字花科植物的存在情况，为期一年，每季度记录一次DBM幼虫和evaluated的存在，评估所有标本的寄生虫出没情况.11种野生十字花科植物采集了9个属9个种，植被丰富度，多样性和均匀性随季节和地点的不同而变化。卷心菜生长区的物种丰富度（＞ 5.25）高于羽衣甘蓝生长区（0.75）。从5个物种中记录到DBM； Raphanus raphanistrum是最首选（分别在Naro Moru和Kinangop中为1.22和0.99 DBM /工厂）。寄生动物区系由六个物种组成。仅从Athi河中的阿拉伯拟南芥中采集到Apanteles sp。和Brachymeria sp。的时空生态位分离。Diadegmasemiclausum是最普遍的寄生虫（Kinangop和Naro Moru的R.raphanistrum寄生率分别为25.7％和22.4％）。 ，其次是Diadegma moUipla（阿提河的16.9％）。在阿提河中海拔半干旱地区，E.Arabicum的拟寄生物物种的Shannon多样性指数（0.87）和物种均匀度（1.05）最高，羽衣甘蓝生长地区的物种丰富度也较高。在野外充当小菜蛾的替代寄主。它们在没有栽培农作物的情况下为害虫及其寄生物提供了庇护，并通过寄生物帮助耕种作物重新定殖。它们还可以作为寄生虫的避难所，并在由于农药施用而导致局部灭绝后帮助作物重新定殖。

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