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<p>Bruchids are intractable pests of stored legumes, with their infestations originating from various sources, including field-infestations. The reports on bruchid resistance in legumes were limited to laboratory-based screening of dry seeds. This research investigates the resistance of black gram to <i>C. chinensis</i> L. during the podding stage using two contrasting wild accessions (IC251397 and IC251394). The study employs both ‘in planta and detached’ pod screenings. Notably, IC251397 demonstrated greater resistance to <i>C. chinensis</i> L. during the podding stage than what was previously recorded in laboratory-based seed screening. The insects showed a comparable preference for oviposition on both accessions, preferring mature green and yellow pods over dark, dried ones. Although neonates managed to penetrate the pod walls of both accessions, larvae died in early instars once they began feeding on the IC251397 seeds, anticipating a possible seed antibiosis effect. The oviposition and hatching rates were similar on pods of both the accessions; however, IC251397 recorded lower seed damage and adult density, underscoring its resistance to <i>C. chinensis</i> at podding stage. The study identified and validated bruchid resistance at the podding stage while addressing the limitations of previous field-screening research that relied solely on pod collection. The resistance at podding stage would be more reliable as it includes both genotype and environment effect rather than only genotype effect in lab screening. Furthermore, it emphasizes the need to identify legume germplasm that confers resistance to bruchid field-infestations, thus&#xa0;paving the way for effective strategies to tackle field-infestations and mitigate their impact on stored grains.</p>

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Resistance of Vigna mungo mungo (L.) Hepper wild accession IC251397 to Callosobruchus chinensis L. at podding stage

  • 期刊论文

  • 发表日期：

    2025年2月20日

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  • Revanasidda Aidbhavi,
  • Meenal Rathore,
  • Aditya Pratap,
  • Sanjay M. Bandi,
  • M. Akram,
  • G. P. Dixit

摘要

Bruchids are intractable pests of stored legumes, with their infestations originating from various sources, including field-infestations. The reports on bruchid resistance in legumes were limited to laboratory-based screening of dry seeds. This research investigates the resistance of black gram to C. chinensis L. during the podding stage using two contrasting wild accessions (IC251397 and IC251394). The study employs both ‘in planta and detached’ pod screenings. Notably, IC251397 demonstrated greater resistance to C. chinensis L. during the podding stage than what was previously recorded in laboratory-based seed screening. The insects showed a comparable preference for oviposition on both accessions, preferring mature green and yellow pods over dark, dried ones. Although neonates managed to penetrate the pod walls of both accessions, larvae died in early instars once they began feeding on the IC251397 seeds, anticipating a possible seed antibiosis effect. The oviposition and hatching rates were similar on pods of both the accessions; however, IC251397 recorded lower seed damage and adult density, underscoring its resistance to C. chinensis at podding stage. The study identified and validated bruchid resistance at the podding stage while addressing the limitations of previous field-screening research that relied solely on pod collection. The resistance at podding stage would be more reliable as it includes both genotype and environment effect rather than only genotype effect in lab screening. Furthermore, it emphasizes the need to identify legume germplasm that confers resistance to bruchid field-infestations, thus paving the way for effective strategies to tackle field-infestations and mitigate their impact on stored grains.