Gray mold is caused by the fungus Botrytis cinerea. Gray mold occurs wherever tomatoes are grown.  |
Symptoms and Signs: Gray mold occurs on all aboveground parts of the plant. A key diagnostic feature is the presence of gray mold on the effected tissue. Photo by Plant Disease Clinic |
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Signs: Gray mold growth on stem. Photo by Plant Disease Clinic |
| Causal organism: | Botrytis cinerea |
| Over wintering: | As sclerotia in infected plant material |
| Months of infection: | May through September |
| Method of dispersal: | Infected seed, wind and rain |
| Infection point: | Flowers, leaf tissue through stomates, lenticels and wounds on stems |
| Control: | Provide adequate spacing to allow plants to dry between waterings. |
| Labeled fungicides | Botrytis can be controlled by proper watering, mulching, and spacing of plants. |
| Comments: | None |
| For Additional Information | Back to Tomato Diseases |
