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<p><i>Leucinodes orbonalis</i> is a key pest of eggplant in the Indian subcontinent and southern Asia, causing characteristic symptoms such as “dead-hearts” during the vegetative phase and circular holes plugged with excreta on infested fruits. In the present study, 182 accessions representing 17 <i>Solanum</i> spp. were evaluated for eggplant shoot and fruit borer (ESFB) infestation. Three species, viz., <i>S. violaceum</i>, <i>S. trilobatum</i>, and <i>S. lasiocarpum</i> were recorded for the first time worldwide as new hosts of <i>L. orbonalis</i>, on which the pest was able to complete its life cycle. Additionally, <i>S. insanum</i>, <i>S. incanum</i>, <i>S. aethiopicum</i>, <i>S. melongena</i>, <i>S. torvum</i>, <i>S. nigrum</i>, <i>S. americanum</i>, <i>S. macrocarpon</i> and <i>S. virginianum</i> were confirmed that <i>L. orbonalis</i> infest fruits of these species with varying degrees of infestation in a free-choice experiment. Biochemical analyses of fruit borer-tolerant <i>S. melongena</i> accessions/landraces (IC636525v, Local melongena-Idduki and Kurumbotribe) revealed higher phenol and polyphenol oxidase levels, along with lower protein and sugar contents, suggesting enhanced resistance to <i>L. orbonalis</i>. Among morphological traits, pericarp thickness showed a positive relationship with ESFB resistance.</p>

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Host expansion of eggplant shoot and fruit borer, Leucinodes orbonalis in Solanum spp

  • 期刊论文

  • 发表日期：

    2025年12月22日

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  • P. P. Thirumalaisamy,
  • Kasireddy Sivasankarreddy,
  • Jiji Joseph,
  • Berin Pathrose,
  • K. Pradheep,
  • A. Suma,
  • M. Latha,
  • K. Venkatesan

摘要

Leucinodes orbonalis is a key pest of eggplant in the Indian subcontinent and southern Asia, causing characteristic symptoms such as “dead-hearts” during the vegetative phase and circular holes plugged with excreta on infested fruits. In the present study, 182 accessions representing 17 Solanum spp. were evaluated for eggplant shoot and fruit borer (ESFB) infestation. Three species, viz., S. violaceum, S. trilobatum, and S. lasiocarpum were recorded for the first time worldwide as new hosts of L. orbonalis, on which the pest was able to complete its life cycle. Additionally, S. insanum, S. incanum, S. aethiopicum, S. melongena, S. torvum, S. nigrum, S. americanum, S. macrocarpon and S. virginianum were confirmed that L. orbonalis infest fruits of these species with varying degrees of infestation in a free-choice experiment. Biochemical analyses of fruit borer-tolerant S. melongena accessions/landraces (IC636525v, Local melongena-Idduki and Kurumbotribe) revealed higher phenol and polyphenol oxidase levels, along with lower protein and sugar contents, suggesting enhanced resistance to L. orbonalis. Among morphological traits, pericarp thickness showed a positive relationship with ESFB resistance.