雨よけハウスにおけるハダニ接種インゲン株を用いたケナガカブリダニ簡易増殖法

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  • A Simple Method for Rearing the Predatory Mite <i>Neoseiulus womersleyi</i> on Kidney Bean Plants Infested with Spider Mites under Greenhouse Conditions
  • アマヨケ ハウス ニ オケル ハダニ セッシュ インゲンカブ オ モチイタ ケナガカブリダニ カンイ ゾウショクホウ

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<p>A simple method for rearing native predatory mites in greenhouses by growers themselves may contribute to biological control against spider mites and/or small pest insects. We investigated the rearing efficiency of a native predatory mite (Neoseiulus womersleyi) on potted kidney bean plants infested with two-spotted spider mites Tetranychus urticae or T. pueraricola in a greenhouse. We obtained many predator individuals from T. urticae-infested bean plants, when offering them additional prey in the experiments; obtaining 2443 individuals from 5 female founders after 24 days, and 300 individuals from 2 females after 28 days. Without additional prey, we could obtain 223 individuals from one female on T. urticae-infested bean plants after 28 days, and 37 individuals from one female on T. pueraricola-infested bean plants after 18 days. These results indicated that kidney bean plants infested with either prey mite are potentially useful for simple rearing of N. womersleyi in a greenhouse.</p>

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