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<p>The guava fruit borer, <i>Conogethes punctiferalis</i> (Guenée) (Lepidoptera: Crambidae), is a&#xa0;serious polyphagous pest attacking guava and several other fruit crops in northern India. During field surveys conducted in guava orchards of Punjab, India, between 2020 and 2025, a&#xa0;larval parasitoid, <i>Trathala</i> sp. nr. <i>flavo-orbitalis</i> Cameron (Hymenoptera: Ichneumonidae), was recorded parasitising larvae of <i>C.&#xa0;punctiferalis</i>. Based on available literature, this appears to be the first field-based report documenting the association of <i>Trathala</i> sp. nr. <i>flavo-orbitalis</i> with <i>C.&#xa0;punctiferalis</i> on guava in Punjab, India, thereby extending its known host-crop and geographical range. Diagnostic characters of the parasitoid, along with its host association and distribution, were documented. Parasitization studies conducted at three locations revealed considerable natural parasitism, ranging from 5.3&#xa0;to 44.7% under field conditions. Parasitization consistently remained higher at Ludhiana and Hoshiarpur and lower at Bathinda. A&#xa0;distinct seasonal trend was observed across all years, with parasitization declining during the warmer and rainy months (July-September), reaching minimum levels of 5–10%, and increasing progressively from November onwards, peaking during the cooler months of January-February (up to 44%). Inter-annual variation showed relatively higher winter peaks during 2021 and 2023, with moderately lower levels in 2024, followed by partial recovery in 2025. These findings underscore the potential of conservation biological control strategies to enhance sustainable management of guava fruit borer in Punjab.</p>

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Parasitization of Guava Fruit Borer, Conogethes punctiferalis (Guenée) Larvae by Trathala sp. nr. flavo-orbitalis (Cameron) (Hymenoptera: Ichneumonidae) on Guava in Punjab, India

  • 期刊论文

  • 发表日期：

    2026年5月6日

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  • Sandeep Singh,
  • Prabhjot Kaur,
  • Vikramjit Singh,
  • Vinay Singh,
  • Aayush Kaushal,
  • Guranshpaul Singh,
  • R. K. Sandhu,
  • Amrinder Kaur,
  • Snehasish Routray,
  • Prakash Patil

摘要

The guava fruit borer, Conogethes punctiferalis (Guenée) (Lepidoptera: Crambidae), is a serious polyphagous pest attacking guava and several other fruit crops in northern India. During field surveys conducted in guava orchards of Punjab, India, between 2020 and 2025, a larval parasitoid, Trathala sp. nr. flavo-orbitalis Cameron (Hymenoptera: Ichneumonidae), was recorded parasitising larvae of C. punctiferalis. Based on available literature, this appears to be the first field-based report documenting the association of Trathala sp. nr. flavo-orbitalis with C. punctiferalis on guava in Punjab, India, thereby extending its known host-crop and geographical range. Diagnostic characters of the parasitoid, along with its host association and distribution, were documented. Parasitization studies conducted at three locations revealed considerable natural parasitism, ranging from 5.3 to 44.7% under field conditions. Parasitization consistently remained higher at Ludhiana and Hoshiarpur and lower at Bathinda. A distinct seasonal trend was observed across all years, with parasitization declining during the warmer and rainy months (July-September), reaching minimum levels of 5–10%, and increasing progressively from November onwards, peaking during the cooler months of January-February (up to 44%). Inter-annual variation showed relatively higher winter peaks during 2021 and 2023, with moderately lower levels in 2024, followed by partial recovery in 2025. These findings underscore the potential of conservation biological control strategies to enhance sustainable management of guava fruit borer in Punjab.