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首页> 外文期刊>Bulletin of Entomological Research >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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摘要

An investigation of the diversity and distribution of wild crucifer species and their importance for cultivated crucifers was conducted during 2005 and 2006 in the highland and mid-altitude semi-arid areas of Kenya. Thirteen species of wild crucifers in nine genera were recorded: Raphanus raphanistrum, Erucastrum arabicum, Sisymbrium officinale, Crambe kilimandscharica, Capsella bursa-pastoris, Rorippa nudiuscula, Ro. micrantha, Ro. microphylla, Lepidium bonariense, Coronopus didymus, Brassica rapa, B. juncea and an unidentified Brassica species. Highland areas had significantly higher species diversity and species richness than mid-altitude semi-arid areas. Species richness, diversity and evenness varied with season and location. Raphanus raphanistrum was the dominant non-cultivated species in the highlands followed by E. arabicum, which was also present and dominant in the semi-arid study sites. Diamondback moth (DBM) was recorded from ten wild crucifer species and R. raphanistrum and E. arabicum were the preferred host plant species. Overall, four larval, one larval-pupal and one pupal parasitoid of DBM were recorded: Diadegma semiclausum, D. mollipla, Apanteles sp., Cotesia plutellae, Oomyzus sokolowskii and Brachymeria species, respectively. Diadegma semiclausum was the most dominant species on all crucifers. We conclude that wild crucifers act as alternative hosts for DBM and provide refugia for DBM parasitoids, which risk local extinction through pesticide application or competition from introduced exotic parasitoid species. The wild crucifers also act as recolonization sites for DBM parasitoids.
机译：在2005年至2006年期间，对肯尼亚的高地和中海拔半干旱地区的野生十字花科物种的多样性和分布及其对栽培十字花科植物的重要性进行了调查。记录了九属的十三种野生十字花科植物：Raphanus raphanistrum，Erucastrum arabicum，Sisymbrium officinale，Crambe kilimandscharica，Capsella bursa-pastoris，Rorippa nudiuscula，Ro。 micrantha，Ro。小叶小叶虫，细叶小叶锦鸡儿，冠毛天牛，芸苔属rapa，芥菜型油菜和未鉴定的芸苔属物种。高地地区的物种多样性和物种丰富度明显高于中海拔半干旱地区。物种的丰富性，多样性和均匀性随季节和位置而变化。 Raphanus raphanistrum是高地上主要的非耕种物种，其次是E. arabicum，在半干旱研究地点也存在并占主导地位。从10个野生十字花科物种中记录了小菜蛾（DBM），R。raphanistrum和E. arabicum是首选的寄主植物。总体上，记录了DBM的4个幼虫，1个幼虫-pu和1个：类寄生虫：分别是半枝硬藻，D。mollipla，Apanteles sp。，小菜蛾，Oomyzus sokolowskii和Brachymeria种。斜纹夜蛾是所有十字花科植物中最主要的物种。我们得出的结论是，十字花科植物充当DBM的替代宿主，并为DBM寄生虫提供避难所，它们可能会因农药施用或与引进的外来寄生虫竞争而面临局部灭绝的危险。野生十字花科植物还充当DBM寄生虫的定殖场所。

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