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<p><i>Leptolegnia chapmanii</i> (Saprolegniales, Leptolegniaceae) is an entomopathogenic oomycete with notable potential for mosquito larval control. This study investigated its natural occurrence in water bodies across Misiones Province, Argentina. Using the ‘insect bait’ method, nine highly virulent isolates were obtained from the northern, central, and southern regions of the province, alongside isolates of less virulent oomycetes. Iterative infection of healthy larvae with previously infected ones improved pathogen recovery, highlighting the method’s effectiveness in field studies. Taxonomic identification combined morphological and molecular analyses with pathogenicity assays on <i>Aedes aegypti</i> larvae. The findings reveal the ecological distribution of <i>L. chapmanii</i> and related oomycetes in Misiones, emphasizing the role of molecular tools and pathogenicity assays in their identification. This study advances the understanding of oomycete diversity and confirms their potential for mosquito control programs.</p>

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Isolation of Leptolegnia chapmanii, an entomopathogenic oomycete, from Misiones, Argentina: a promising tool for vector mosquito control

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • Manuel E. Rueda-Páramo,
  • Christina Schuster,
  • Dario Balcazar,
  • Flavia V. Diez del Valle,
  • Alejandra C. Gutierrez,
  • Anna Heitmann,
  • Oscar D. Salomon,
  • Andreas Leclerque

摘要

Leptolegnia chapmanii (Saprolegniales, Leptolegniaceae) is an entomopathogenic oomycete with notable potential for mosquito larval control. This study investigated its natural occurrence in water bodies across Misiones Province, Argentina. Using the ‘insect bait’ method, nine highly virulent isolates were obtained from the northern, central, and southern regions of the province, alongside isolates of less virulent oomycetes. Iterative infection of healthy larvae with previously infected ones improved pathogen recovery, highlighting the method’s effectiveness in field studies. Taxonomic identification combined morphological and molecular analyses with pathogenicity assays on Aedes aegypti larvae. The findings reveal the ecological distribution of L. chapmanii and related oomycetes in Misiones, emphasizing the role of molecular tools and pathogenicity assays in their identification. This study advances the understanding of oomycete diversity and confirms their potential for mosquito control programs.