WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office.
Narcissus (Daffodil): Virus diseases
categories: Bulbs Narcissus (Daffodil) Narcissus (Daffodil) Diseases Ornamentals
revision date: 2024-07-07 02:01
Photo by: R.S. Byther
Biology
While many viruses infect narcissus, two virus diseases (Yellow Stripe and White Streak) are common in the Pacific Northwest. Yellow Stripe is characterized by the white mottling or streaking of the flower and streaking of the upper 2⁄3 of the foliage with pale green to yellow stripes. The affected foliage also develops a rough texture and may be stunted or distorted. Yellow Stripe Virus is transmitted by aphids. White Streak is characterized by the appearance of very narrow dark green to purplish stripes on the foliage and flower stems. These later turn white and necrotic. Affected leaves die. White Streak Virus is transmitted by aphids and often appears after periods of high temperature and strong sunlight.
Management Options
Use Integrated Pest Management (IPM) for successful plant problem management.
Non-chemical Management
Select non-chemical management options as your first choice!
- Control aphids to minimize spread of disease.
- Remove and destroy infected plants immediately.
Chemical Management
IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.
- None recommended
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.