Pine: Lophodermella needle cast
Photo by: R.S. Byther
Biology
Lophodermella needle cast is a fungal disease that infects current-season needles, but symptoms are not found until the following spring. Infected needles turn reddish-brown and later become yellow or straw-colored.
Shallow dimples or depressions can be found on all needle surfaces. Infected needles are killed and cast (dropped from the tree) the following summer.
Fungal fruiting bodies which open with a longitudinal slit may be found in dead two-year-old needles. Severely infected trees often develop a “lion-tailed” appearance, as only current-season needles remain on the tree.
- This disease may be confused with Lophodermium needle cast.
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!
- Do not plant in low areas or areas with poor air drainage.
- Space plantings to provide good air circulation.
- Reduce humid conditions favoring disease by removing weeds near and under trees, thinning the canopy, and pruning lower branches.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
- Apply when needles are half grown and again when growth ceases.
- Homeowners should not make foliar applications to trees over 10 ft tall.
- Consult a commercial pesticide applicator for treatment of trees and shrubs over 10 ft. tall.
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.
Additional Images
Photo by: C.R. Foss
Photo by: C.R. Foss
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Evidence of noncompliance may be reported through your local Extension office.