Currant, Gooseberry: Anthracnose (Leaf spot)
Photo by: R.S. Byther
Biology
Anthracnose is a fungal disease affecting the leaves of currants and gooseberries. Leaves show small, round or irregularly-shaped spots on the upper or lower surfaces. The spots are usually dark brown in color and may develop tiny, gray fungal structures in the centers. Severely affected leaves may turn yellow and drop prematurely. The leaf loss can weaken plants and reduce yields.
Currant fruit may also show spotting. On fruit, the spots are tiny and resemble flyspecks. Severely infected berries crack open and drop.
The fungus is spread from infected to healthy leaves by splashing water and overwinters in fallen leaves. Disease development is favored by wet spring weather.
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!
- Avoid overhead watering.
- Space plantings and prune to provide good air circulation and reduce humidity.
- Rake fallen leaves from beneath plants. Destroy or discard (do not compost) diseased plant materials. cultivation to bury diseased leaves may also be effective.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
- Begin applications when the first leaf reaches full size.
- Make applications until dry weather prevails in summer.
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.