Chrysanthemum white rust

Chrysanthemum white rust (CWR), caused by the fungus Puccinia horiana, can be a serious disease of chrysanthemum crops. Growers need to know its symptoms and methods of control so they can take action when they see early signs of the disease. This Agnote provides information about the following aspects of the disease:

• identification
• cause
• spread 
• favoured conditions
• affected crops and
  
• control.