Verticillium wilt

Verticillium wilt

Photo by Howard F Schwartz, Colorado State University, United States;

  • The risk is from exotic defoliating strains to which the local varieties have little or no resistance (non-defoliating strains are present in Australia)
  • Extremely wide host range, including vegetable, fruit and broadacre crops
  • Leaf mottling, vascular peppering, total defoliation, boll shedding
  • When the stem is cut lengthways, vascular discolouration exhibits flecking of the inner tissues
  • Spread by spores in water, soil and infected plant material, clothing and equipment
  • Non-defoliating strains of Verticillium dahliae occur in Australia. The defoliating strain VCG 1A is known to occur in Australia and is currently under review.

High priority pest of: Cotton, Olives, Almonds, Chestnuts, Pecans, Pistachios, Walnuts

Scientific name: Verticillium dahliae (exotic defoliating strains)
EPPRD Category: 3
Life Form: Fungus

Pest Documents

FS: fact sheet

CP: contingency plan

DP: diagnostic protocol