Narcissus (Daffodil): Leaf scorch
Photo by: R.S. Byther
Biology
Leaf scorch is caused by a fungus that survives in the necks of the bulbs (thus infecting emerging leaves) and also in infected foliage. Leaf tips develop yellow-brown to reddish elongate spots or blotches soon after they emerge from the bulb. The spots become raised and scabby, with tiny brown fruiting bodies of the fungus in the scabby area. This disease can also cause bud distortion and brown spotting of flowers.
Management Options
See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.
Non-chemical Management
Select non-chemical management options as your first choice!
- Rotate plantings.
- Prune out and destroy infected foliage when first noticed (when practical).
- Remove and destroy severely infected bulbs.
- Do not plant in poorly drained areas which favor disease development.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
Apply fungicides to protect new growth.
Approved Pesticides
If you choose to use a pesticide, some examples of products that are legal in Washington are listed below. Some products are labeled for just INDOOR or just OUTDOOR use, or may allow both uses. Be sure to choose a product appropriate for your situation. Always read and follow all label directions.
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.