Odium citri

Powdery mildew

Photo by Robert Lambe, Virginia Polytechnic Institute and State University, Bugwood.org

  • Found in Asia, with reports from Central and South America and occasionally in California
  • Affects leaves, stems and fruit of all citrus cultivars
  • Whitish powdery patches of mildew form on the upper surface of leaves, which may then shrivel and fall
  • Older damage on leaves and fruit turns brown/grey
  • Mildew may cause premature leaf and fruit drop and dieback
  • Young affected fruit may fall prematurely. Remaining fruit develop brown irregular markings
  • Can be spread over large distances by wind currents


Scientific name: Odium citri
EPPRD Category:
Life Form: Fungus