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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) >How host-specific is diamondback moth?　A study on performance with brassicaceous and non-brassicaceous species
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How host-specific is diamondback moth?　A study on performance with brassicaceous and non-brassicaceous species

机译：小菜蛾的寄主是怎样的？黄铜科和非黄铜科物种的性能研究

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Diamondback moth，Plutetla xylostella(L.)(Lepidoptera：Plutellidae)is oligophagous on Brassl‘Caceae.but is known to have occasionally switched to also feed upon hosts of other plant families. The spider flower，Cleome hassleriana Chodat(Capparaceae)and garden nasturtium Tropaeolum majus L.(Tropaeolaceae)are taxonomically distinct but chemically related to Brassicaceae by containing glucosinolates.Both of these plant species can occur sympatrically with wild crucifers，and so could potentially harbor P.xylostella populations，perhaps providing bridge hosts until crop plants ale available.But these non-brassicaceous plants have never been reported to be infested with P. xylostella in the region. In this extensive laboratory and greenhouse study，we tested ovipositional preferences of P.xylostella in a freechoice situation using two Brassicaceae viz.conventional canola，Brassica napus L.，flixweed，Descurainia sophia(L.)Webb ex Prantl，and two non-Brassicaceae viz.C. hassleriana and T.majus.No-choice tests were conducted to investigate key life history parameters i.e.，survival，developmental time，herbivory，pupal weight，silk weight，adult weight，forewing wing area，and longevity(without food)for both female and male specimens when reared on all four plant species.Although several P.xylostella developmental parameters were similar on C.hassleriana and T.majus as on more preferred Brassicaceae，non-hosts lacked the ability to compensate as well for P.xylostella herbivory.Host shifting by P.xylostella is evidently a strategy for population survival when preferred hosts are not available，and is a strategy that may predispose new generation offspring for enhanced migratory capability.
机译：小菜蛾（Plutetla xylostella（L。）（鳞翅目：Plutellidae））在Brassl'Caceae上是低食性的，但据称偶尔会捕食其他植物科的寄主。蜘蛛花（Cleome hassleriana Chodat（Capparaceae）和花园金莲花Tropaeolum majus L.（Tropaeolaceae））在分类学上是不同的，但在化学上与芥蓝科有关，因为它们含有芥子油苷。这两种植物都可以与野生十字花科植物同生，因此可能带有P。 .xylostella种群，也许可以提供桥寄主，直到可以买到农作物。但是，从未报道过这些非黄铜科植物在该地区感染了x.ostylella。在这项广泛的实验室和温室研究中，我们使用两个芸苔科植物油菜，传统油菜，芸苔属，长白花草，长白麦草Webb ex Prantl和两个非芸苔科植物在自由选择条件下测试了小菜蛾的产卵偏好。即进行了非选择测试，以调查女性和女性的生存，发育时间，草食，pu体重，蚕丝重量，成年体重，前翅面积和寿命（无食物）的关键生命史参数，在所有四种植物上饲养雄性标本。尽管在哈苏属植物和马来酸科植物中，一些小菜蛾的发育参数与更优选的十字花科相同，但非寄主也缺乏补偿小菜蛾的食草能力。当没有首选寄主时，P.xylostella转移显然是种群生存的策略，并且该策略可能使新一代后代具有增强的迁徙能力。

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