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Browse by Series: Vegetable Pathology Factsheets
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Early Blight of Tomato

By: Inga Meadows Vegetable Pathology Factsheets

This factsheet describes early blight of tomato, including identification, transmission and disease management, and control.

Tomato Late Blight

By: Lina Quesada-Ocampo, Inga Meadows Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of tomato late blight.

Fusarium Wilt of Tomato

By: Cecelia Stokes, Inga Meadows Vegetable Pathology Factsheets

This disease factsheet describes Fusarium wilt of tomato. Symptoms, pathogen, environmental conditions, and management are included.

Cucurbit Downy Mildew

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of cucurbit downy mildew.

Fusarium Wilt of Watermelon

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of Fusarium wilt of watermelon.

Gummy Stem Blight of Cucurbits

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of Gummy Stem Blight.

Black Rot of Sweetpotato

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of black rot in sweetpotatoes.

Phytophthora Blight of Peppers

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of Phytophthora blight of peppers.

Cucurbit Powdery Mildew

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This factsheet discusses the identification and control of cucurbit powdery mildew.

Southern Blight of Tomato and Pepper

By: Inga Meadows, Amanda Scherer, Michelle Henson Vegetable Pathology Factsheets

This plant disease fact sheet discusses southern blight, a soil-borne fungus that attacks tomatoes and peppers, and several other economically important crops, including beans, cantaloupe, carrots, peppers, potatoes, sweet potato, and watermelon.

Verticillium Wilt of Tomato and Eggplant

By: Cecelia Stokes, Inga Meadows Vegetable Pathology Factsheets

This disease factsheet is a brief description of Verticillium wilt of tomato and eggplant. Symptoms, causal agent, and management are included.

Botrytis Gray Mold of Tomato

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of Botrytis gray mold of tomatoes.

Potato Late Blight

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of potato late blight.

Collar Rot and Alternaria Stem Canker of Tomato

By: Amanda Scherer, Inga Meadows Vegetable Pathology Factsheets

This vegetable disease factsheet discusses collar rot and Alternaria stem canker of tomato, which are caused by different species of fungi belonging to the genus Alternaria. Both pathogens can cause large, irregularly shaped stem lesions with pronounced concentric rings. However, the concentric rings may not always be pronounced with collar rot.

Anthracnose of Pepper

By: Cecelia Stokes, Inga Meadows Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of anthracnose of pepper.

Anthracnose of Cucurbits

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of anthracnose in cucurbits.

Gray Leaf Spot of Tomato

By: Ella Reeves, Inga Meadows Vegetable Pathology Factsheets

This publication describes gray leaf spot of tomato. Disease management options are provided for conventional and organic growers and for homeowners.

Sweetpotato Scurf

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This factsheet describes the identification and management of sweetpotato scurf.

Downy Mildew on Brassica Crops

By: Ella Reeves, Suzette Sharpe, Inga Meadows Vegetable Pathology Factsheets

This factsheet covers the pathogen, host plants, symptoms, and management of downy mildew, a foliar disease that affects brassica crops.

Black Rot of Brassicas

By: Cecelia Stokes, Inga Meadows Vegetable Pathology Factsheets

This publication discusses symptoms and signs of black rot disease of Brassicas. The publication includes disease management practices for both conventional and organic growers.

Tobamoviruses that affect tomato (TMV, ToMV, ToBRFV)

By: Lucy White, Andy Cooper, Inga Meadows Vegetable Pathology Factsheets

This factsheet describes three viruses that affect tomato: tobacco mosaic virus (TMV), Tomato mosaic virus (ToMV), and Tomato brown rugose fruit virus (ToBRFV). It provides information about symptoms and signs, disease cycle, and control.

Sweetpotato Root Knot Nematode

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This factsheet discusses the identification and management of root knot nematode of sweetpotato.

Rhizopus Soft Rot of Sweetpotato

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of Rhizopus soft rot of sweetpotatoes.

Basil Downy Mildew

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of basil downy mildew.

Fusarium Root Rot of Sweetpotato

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of Fusarium root rot of sweetpotato.

Foliar Fungal Diseases on High Tunnel and Greenhouse Tomatoes

By: Amanda Scherer, Inga Meadows Vegetable Pathology Factsheets

This vegetable disease fact sheet discusses three foliar fungal diseases (Botrytis gray mold, leaf mold, and powdery mildew) of high tunnel and greenhouse tomatoes.

Lesion Nematode in Potato

By: Adrienne Gorny, Ari Grode Vegetable Pathology Factsheets

Lesion nematode damage in white or Irish potato is caused by plant-parasitic roundworms. This publication discusses the signs, symptoms, and management of the disease.

Geotrichum Sour Rot of Sweetpotato

By: Lina Quesada-Ocampo, Madison Stahr Vegetable Pathology Factsheets

This factsheet discusses the identification and management of geotrichum sour rot of sweetpotato.

Hop Downy Mildew

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This vegetable pathology factsheet describes the identification and treatment of hop downy mildew.

Lettuce Drop

By: Lina Quesada-Ocampo Vegetable Pathology Factsheets

This factsheet discusses the identification and management of Sclerotinia Drop of lettuce.

Southern Blight of Sweetpotato

By: Lina Quesada-Ocampo, Madison Stahr Vegetable Pathology Factsheets

This factsheet discusses the identification and management of southern blight of sweetpotato.

Clubroot of Brassicas

By: Ella Reeves, Suzette Sharpe, Inga Meadows Vegetable Pathology Factsheets

The pathogen, host plants, symptoms and management of clubroot, a disease of crucifer crops, are discussed in this factsheet.

Tomato Pith Necrosis

By: Katie Carson, Lucy White, Inga Meadows Vegetable Pathology Factsheets

Tomato pith necrosis, first observed on tomato plants in 1978, continues to be a threat to tomato production across the US. The disease most severely impacts crops where high humidity and stress conditions are present, and as a result, it is mostly a concern for greenhouse and high tunnel tomatoes, but it can also impact field-grown tomatoes. There are currently no tomato varieties resistant to pith necrosis, nor any chemical treatments commercially available, so preventing the disease with good management practices is the best way to limit its occurrence.

Bacterial Canker of Tomato

By: Katie Carson, Aaron Kohutek, Inga Meadows Vegetable Pathology Factsheets

Clavibacter michiganensis, commonly known as bacterial canker, is considered one of the most necessary-to-manage diseases in the greenhouse tomato industry. Bacterial canker spreads quickly to infect both transplanted and directly seeded crops, especially through pruning practices when shears are not properly disinfected. An epidemic can begin with a single infected seed, so disease prevention should always remain a top priority for all growers.