Narcissus (Daffodil): Leaf scorch
categories: Bulbs Narcissus (Daffodil) Narcissus (Daffodil) Diseases Ornamentals
last review date: 2023-02-08 12:00
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: For more information on using pesticides, visit Home and Garden Fact Sheets | Pesticide Resources and Education Program | Washington State University.
Apply fungicides to protect new growth.
Approved Pesticides
Examples of pesticides that are legal for home use in Washington State are listed below.
The list may not include all products registered for this use.
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.