施設栽培アスパラガスにおけるネギアザミウマ防除のためのタバコカスミカメとバンカー植物の有効性の検討

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  • Effectiveness of <i>Nesidiocoris tenuis</i> and banker plants on the control of <i>Thrips tabaci</i> in greenhouse asparagus.
  • シセツ サイバイ アスパラガス ニ オケル ネギアザミウマ ボウジョ ノ タメ ノ タバコカスミカメ ト バンカー ショクブツ ノ ユウコウセイ ノ ケントウ

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<p>　Thrips tabaci （Thysanoptera: Thripidae） is a major pest of asparagus in Saga Prefecture. We evaluated the effectiveness of Nesidiocoris tenuis（ Hemiptera: Miridae）, a biological control agent against T. tabaci, using banker plants in greenhouse asparagus. We examined effects of food （eggs of Ephestia kuehniella or fresh shoots of Sesamum indicum and Cleome hassleriana） in the nymphal stage of N. tenuis on the feeding amount of T. tabaci in the laboratory. The experiment revealed that nymphal food did not affect the number of T. tabaci fed on by N. tenuis. Then we prepared small greenhouses with four asparagus plants and released 50 individuals of T. tabaci and a pair of N. tenuis adults. The release of N. tenuis had a significant negative effect on T. tabaci density on asparagus, but T. tabaci population gradually increased from early August to late October. When either S. indicum, C. hassleriana, or Verbena × hybrida ‘Tapian’ was planted adjacent to asparagus as banker plants, N. tenuis kept the density of T. tabaci at low levels throughout the experiment. These suggest that the use of N. tenuis together with banker plants is effective to control T. tabaci populations in greenhouse asparagus.</p>

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