Meadowfoam (Limnanthes alba)-Botrytis Blight

Note the fuzzy, grey mycelium.
Note the fuzzy, grey mycelium.

Cause Botrytis sp., a fungus, that has been observed in meadow-foam plantings in Oregon but have never been reported. The disease has been observed in dense plantings with a lush vegetative growth caused by overfertilization. The disease also has been observed after the crop has lodged due to heavy late-spring rains that matted foliage to the ground.

Symptoms Gray moldy growth on affected plants.

Cultural control Provide a moderate fertility with about 40 to 50 lb/A nitrogen. The disease has not been as prevalent at these rates.