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Prevalence and Distribution of Endosymbionts in <i>Bemisia tabaci</i> Populations from Pakistan: Dominance of <i>Arsenophonus</i> in Indigenous Asia II-1 Population.

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Cotton leaf curl disease, a multicomponent begomovirus complex.

Rob W Briddon1

  • 1Department of Disease and Stress Biology, John Innes Centre, Colney Lane, Norwich, NR4 7UH, UK.

Molecular Plant Pathology
|June 24, 2010
PubMed
Summary
This summary is machine-generated.

Cotton leaf curl disease, caused by begomoviruses and their DNA beta satellite, severely impacts cotton crops in Pakistan and India. Resistant cultivars are now facing challenges as the virus complex evolves.

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Area of Science:

  • Plant Pathology
  • Virology
  • Entomology

Background:

  • Cotton leaf curl disease (CLCuD) is a significant threat to cotton production in Pakistan and India.
  • It is transmitted by the whitefly Bemisia tabaci and associated with begomoviruses requiring a DNA beta satellite for symptom induction.

Purpose of the Study:

  • To detail the characteristics of the begomoviruses and satellite components involved in CLCuD.
  • To describe the physical properties, disease symptoms, and control strategies for CLCuD.

Main Methods:

  • Identification and characterization of begomoviruses, DNA beta, and DNA 1 components associated with CLCuD.
  • Observation and documentation of disease symptoms in infected cotton plants.
  • Review of current disease control methods, including insecticide application, roguing, and resistant cultivars.

Main Results:

  • Five distinct begomoviruses have been identified in the CLCuD complex.
  • CLCuD symptoms include leaf curling, stunted growth, and enations, appearing 2-3 weeks post-inoculation.
  • Conventional breeding for resistant cotton cultivars has shown initial promise but is now being overcome by the evolving virus complex.

Conclusions:

  • CLCuD is a complex disease involving begomoviruses, DNA beta satellites, and DNA 1 components.
  • Effective control remains challenging due to vector transmission and the virus complex's ability to overcome resistance.