“Candidatus Phytoplasma aurantifolia” increased the fitness of Hishimonus phycitis; the vector of lime witches’ broom disease

Chamran Hemmati*, Mehrnoosh Nikooei, Abdullah M. Al-Sadi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Hishimonus phycitis is one of the main insect vectors of phytoplasmas, in particular of ‘Candidatus Phytoplasma aurantifolia’-related strains associated with witches' broom disease in many crops. A study was conducted to investigate the relationship between H. phycitis infection by phytoplasmas and some of its biological parameters. H. phycitis harboring phytoplasmas resulted in more fecundity (higher number of offspring produced) and higher nymph developmental rate compared to uninfected insects. The finite rate of population increase (λ) and net reproductive rate (R0) were higher in phytoplasma-infected H. phycitis indicating that the overall fitness of the infected population was improved. The survival of phytoplasma-infected female was lower compared with infected male, which suggest that they may be a fitness trade-off in response to phytoplasma infection. A beneficial effect of a plant pathogen on vector fitness may indicate that the pathogen developed a relationship with the insect first, then moving to the plant secondarily. Taken together, our findings suggest that elimination of the infected trees (as a source of inoculum) should be a relevant part of the lime witches' broom disease management.

Original languageEnglish
Article number105532
JournalCrop Protection
Volume142
DOIs
Publication statusPublished - Apr 2021

Keywords

  • Fecundity
  • Fitness
  • Leafhopper vector
  • Phytoplasmas

ASJC Scopus subject areas

  • Agronomy and Crop Science

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