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<p>Mirid bugs include polyphagous predators, which are used for augmentative biological control in the greenhouses to manage whiteflies, thrips and lepidopteran pests around the world. <i>Nesidiocoris tenuis</i> (Reuter) (Hemiptera: Miridae), which is indigenous to Japan, has recently been commercialised to control whiteflies and thrips. This predator species is expected to control both <i>Bemisia tabaci</i> (Gennadius) (Hemiptera: Aleyrodidae) and <i>Thrips palmi</i> Karny (Thysanoptera: Thripidae) on greenhouse-grown cucumbers in Japan. To examine the suppressive effects of <i>N. tenuis</i> against these two pest species, occurring in cucumbers, it is essential to clarify the prey selection between them. In this study, we examined the preference of <i>N. tenuis</i> between <i>B. tabaci</i> and <i>T. palmi</i> on cucumber leaf discs under controlled conditions. <i>Nesidiocoris tenuis</i> female adults preferred <i>T. palmi</i> larvae over <i>B. tabaci</i> nymphs. Preference for <i>T. palmi</i> larvae was weakest when the density ratio of <i>B. tabaci</i> to <i>T. palmi</i> presented to the <i>N. tenuis</i> female was highest. Neither the nymphal developmental stage of <i>B. tabaci,</i> nor predation experience in either prey species prior to the experiment, significantly affected prey selection. <i>Nesidiocoris tenuis</i> has excellent predatory characteristics for the control of <i>T. palmi</i> when it co-occurs with <i>B. tabaci</i> on cucumbers in greenhouses.</p>

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Feeding preference of Nesidiocoris tenuis (Hemiptera: Miridae) between Bemisia tabaci (Hemiptera: Aleyrodidae) and Thrips palmi (Thysanoptera: Thripidae)

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Natsuki Hashimoto,
  • Eizi Yano,
  • Ikuo Kandori

摘要

Mirid bugs include polyphagous predators, which are used for augmentative biological control in the greenhouses to manage whiteflies, thrips and lepidopteran pests around the world. Nesidiocoris tenuis (Reuter) (Hemiptera: Miridae), which is indigenous to Japan, has recently been commercialised to control whiteflies and thrips. This predator species is expected to control both Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) and Thrips palmi Karny (Thysanoptera: Thripidae) on greenhouse-grown cucumbers in Japan. To examine the suppressive effects of N. tenuis against these two pest species, occurring in cucumbers, it is essential to clarify the prey selection between them. In this study, we examined the preference of N. tenuis between B. tabaci and T. palmi on cucumber leaf discs under controlled conditions. Nesidiocoris tenuis female adults preferred T. palmi larvae over B. tabaci nymphs. Preference for T. palmi larvae was weakest when the density ratio of B. tabaci to T. palmi presented to the N. tenuis female was highest. Neither the nymphal developmental stage of B. tabaci, nor predation experience in either prey species prior to the experiment, significantly affected prey selection. Nesidiocoris tenuis has excellent predatory characteristics for the control of T. palmi when it co-occurs with B. tabaci on cucumbers in greenhouses.