Helene Dillard

Helene Roberts Dillard (born March 1955) is an American plant pathologist and dean emerita of UC Davis's College of Agricultural and Environmental Sciences. She was elected in 2006 a Fellow of the American Phytopathological Society and in 2021 a Fellow of the American Association for the Advancement of Science.

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Sclerotinia rot of cabbage (sometimes referred to as white mold) affects cabbage cultivars grown for sauerkraut, storage, and fresh market. The disease is caused by the fungus Sclerotinia sclerotiorum. This fungus can cause serious losses in the field, in storage, and under transit and market conditions. S. sclerotiorum is widely distributed in relatively cool and moist areas throughout the world. The fungus has a wide host range and is known to attack over 360 species of plants. In the Cruciferae family alone, it has been recorded on 18 genera and 32 species. In New York State the fungus is capable of infecting many types of vegetables and is particularly serious on snap beans. It also infects weeds such as ragweed, dandelion, and wild clover..
- Sclerotinia Rot of Cabbage, Vegetables IPM Fact Sheet Page 730.30. New York State (NYS) Integrated Pest Management (IPM) Program. 1987. pdf at ecommons.cornell.edu

Tomato anthracnose is a serious disease of processing tomatoes caused by the fungus Colletotrichum coccodes and is a threat to tomatoes grown in New York State. To minimize the mold count in processed tomato products, processors impose a strict limit on the amount of anthracnose acceptable on the raw product. ...
The fungus survives the winter as seedlike structures called sclerotia and as threadlike strands called hyphae in infested tomato debris. In late spring the lower leaves and fruit may become infected by germinating sclerotia and spores in the soil debris. Infections of the lower leaves of tomato plants are important sources of spores for secondary infections throughout the growing season. Senescent leaves with early blight infections and leaves with flea beetle injury are especially important spore sources because the fungus can colonize C. coccodes and produce new spores in these wounded areas.
- Tomato anthracnose, Vegetables IPM Fact Sheet Page 735.70. New York State (NYS) Integrated Pest Management (IPM) Program. 1987. pdf at ecommons.cornell.edu