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<p><i>Bemisia tabaci</i> MED (Mediterranean) is a&#xa0;highly polyphagous whitefly that damages several crops of economic importance worldwide by causing physiological and morphological anomalies. For its management, chemical control is the main method used, which has decreased efficiency from chemical control due to insect resistance to certain active ingredients. Given this complex issue, alternative methods to chemical control must be employed to support integrated pest management (IPM). The use of insect resistant genotypes is one such method examined in this study. This research aimed to identify melon genotypes resistant to <i>B.&#xa0;tabaci</i> MED from 49&#xa0;evaluated accessions. Initially, a&#xa0;screening was carried out on 49&#xa0;genotypes in a&#xa0;no-choice test, to evaluate the whitefly oviposition. Subsequently, 19&#xa0;genotypes with high resistance potential and two susceptible standards were selected. These genotypes, free-choice tests were performed in a&#xa0;greenhouse to evaluate these plants for oviposition antixenosis. In addition, the plants were evaluated for trichome density, and colorimetric parameters to identify physical and morphological factors involved in the host selection process. Following all analyses, 10&#xa0;genotypes were selected to assess the insect’s biological performance confined to these genotypes, as well as their cucurbitacin&#xa0;B (quantified by UHPLC-DAD/UV-MS) content. Based on the collected data, PI 161375, PI 414735, PI 313970, Yoko, Rio Grande and Hy-Mark genotypes presented oviposition antixenosis to <i>B.&#xa0;tabaci</i> MED. Additionally, PI 414735 genotype exhibited antibiosis to this whitefly.</p>

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Resistance Mechanisms in Cucumis melo (L.) Genotypes to Bemisia tabaci MED (Hemiptera: Aleyrodidae)

  • 期刊论文

  • 发表日期：

    2026年8月2日

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  • Vinicius Fernandes Canassa,
  • Felipe Savieto Furquim de Souza,
  • Roberta Wagner de Oliveira,
  • Aline Marques Pinheiro,
  • Rodrigo Donizeti Faria,
  • Isabella Rubio Cabral,
  • Cristiano Soleo Funari,
  • Martin Kássio Leme da Silva,
  • Valter Rodrigues Oliveira,
  • André Luiz Lourenção,
  • Carlos Gilberto Raetano

摘要

Bemisia tabaci MED (Mediterranean) is a highly polyphagous whitefly that damages several crops of economic importance worldwide by causing physiological and morphological anomalies. For its management, chemical control is the main method used, which has decreased efficiency from chemical control due to insect resistance to certain active ingredients. Given this complex issue, alternative methods to chemical control must be employed to support integrated pest management (IPM). The use of insect resistant genotypes is one such method examined in this study. This research aimed to identify melon genotypes resistant to B. tabaci MED from 49 evaluated accessions. Initially, a screening was carried out on 49 genotypes in a no-choice test, to evaluate the whitefly oviposition. Subsequently, 19 genotypes with high resistance potential and two susceptible standards were selected. These genotypes, free-choice tests were performed in a greenhouse to evaluate these plants for oviposition antixenosis. In addition, the plants were evaluated for trichome density, and colorimetric parameters to identify physical and morphological factors involved in the host selection process. Following all analyses, 10 genotypes were selected to assess the insect’s biological performance confined to these genotypes, as well as their cucurbitacin B (quantified by UHPLC-DAD/UV-MS) content. Based on the collected data, PI 161375, PI 414735, PI 313970, Yoko, Rio Grande and Hy-Mark genotypes presented oviposition antixenosis to B. tabaci MED. Additionally, PI 414735 genotype exhibited antibiosis to this whitefly.