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首页> 外文会议>International Diamondback Moth and Other Crucifer Pests Workshop >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：野生白叶草在肯尼亚主要白菜和羽衣甘蓝生长区的多样性，分布及作用

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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 crucifers 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 mollipla ( 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 crucifers 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：在肯尼亚四大十字花植物生长区的重复调查中探讨了DBM及其寄生虫对DBM及其寄生虫的物种的多样性，分布和作用。在每个站点选择三十个领域，季度村内和周边地区内的野生霉菌氏植物的存在持续一年。评估DBM幼虫和蛹的存在，并将所有标本用于寄生素出苗的实验室。收集了9个属的11种野生霉菌素。植被丰富，多样性和均匀度随着季节和地点而变化。卷心菜生长区域具有明显高的物种丰富（> 5.25），而不是羽衣甘蓝生长区域（0.75）。 DBM从五种物种中记录; Raphanus Raphanistrum是最优选的（分别为纳罗莫鲁和Kinangop的1.22和0.99 dBm /植物）。寄生虫动物群组成了六种物种。用Apanteles Sp观察时间和空间的Niche分离。和触发器sp。仅从Athi River中的arucastrum Arabicum收集。 DiaDegma Semiclausum分别是最普遍的寄生蛋白（25.分别在Kinangop和Naro Moru的Raphanistrum上的25. 7％和22. 4％寄生寄生派对），其次是Diadegma Mollipla（16.9％在Athi River）。寄生素物种（0.87）和物种均匀性（1.05）的Shannon分集指数在Athi河中空半干旱地区的E.Arabicum上最高。在羽衣甘蓝越来越多的地区，物种丰富度也较高。我们得出结论，该领域中的野生霉素是Diamondback蛾的替代主机。它们在没有培养的作物的情况下为害虫和寄生虫提供避难所，并帮助通过寄生虫进行培养作物的重新调整。它们也充当潜在的避难所，并援助由于农药应用而在局部灭绝后的作物的重新调整。

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