Fact Sheets - Vegetable Diseases

Big Bud is caused by Phytoplasma species. Phytoplasmas are a unique type of small bacteria that do not have a cell wall. Phytoplasmas are transmitted from one plant to another by phloem-feeding insects such as leafhoppers and psyllids

Botrytis neck rot is caused by Botrytis acclada and B. allii. The fungi are specific to members in the Alliaceae (onion and garlic) and can be found in all onion-producing regions around the world.

The bacterium Candidatus Liberibacter solanacearum infects pepper plants. Candidatus Liberibacter solanacearum is found in all states west of the Rocky Mountains, Kansas, and Texas. The disease was first reported in the United States in 2004. Yield losses...

Corn smut is a fungal disease that causes swellings (galls) on ears, leaves, stalks, and tassels of sweet and field corn. Smut is rarely observed in Utah and is not considered economically important for grain production.

Beet Curly Top Virus (BCTV) is taxonomically a Curtovirus in the Geminiviridae family of plant pathogenic viruses. It is vectored, or carried, by the beet leafhopper (BLH) insect. BCTV causes curly top of tomato, a comon disease in Utah and the western U....

Damping-off is caused by several soilborne fungi including Pythium, Rhizoctonia, Fusarium and Phytophthora species. The fungi kill seedlings that are just germinating and seedlings that have been growing for several days.

Fusarium wilt and Verticillium wilt are both soilborne fungal diseases that affect many vegetable crops grown in Utah. Both cause similar symptoms in their hosts.

Iris Yellow Spot Virus (IYSV) is a damaging viral pathogen of onions. The disease can devastate an onion field by destroying the photosynthetic area of the leaves of infected plants.

Pink root (Phoma terrestris) is a devastating disease in onion production. The fungus is found worldwide in the soil and can be up 45cm (1.5 ft) deep.

Leveillula taurica is a powdery mildew fungus capable of infecting onions, garlic, and over 1000 plants in various genera and species in the western United States.

Powdery mildew is widespread in Utah and affects many vegetables, fruit, and landscape plants. There are several species of powdery mildew fungi, and typically they target just a single host or only hosts in related plant families.

A short summary of the top insect and disease pests of beans and how they are managed by the backyard gardeners.

A short summary of the top insect and disease pests of cole crops and how they are managed by the backyard gardeners.

A short summary of the top insect and disease pests of leafy greens and how they are managed by the backyard gardeners.

A short summary of the main insect and disease pests of peas and how they are managed by the backyard gardeners.

A short summary of the main insect and disease pests of tomato and how they are managed by the backyard gardeners.

In Utah, Tomato spotted wilt virus (TSWV) most commonly affects tomatoes, peppers, and tomatillos. It has also been found in ornamental plants such as blanket flower(Gaillardia sp.), and zinnia, and weeds.

TMV/ToMV is transmitted from handling contaminated tobacco products. TMV/ToMV is also transmitted by handling infected plants.

The non-culturable bacterium Candidatus Liberibacter solanacearum causes zebra chip disease of potatoes. Bacteria are transmitted by potato psyllids,(Bactericera cockerelli).