Vegetable Diseases

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Updated: December 2, 2021

IPM - Prevent, Identify, and Manage Plant Problems

How to ID, prevent, and manage plant problems in Maryland using IPM
no lawn landscape
Updated: October 11, 2021

White Rot of Alliums in the Garden

White rot is a destructive disease of onions and garlic.
white rot diseased onion bulbs
Updated: September 8, 2021

Alternaria Fruit or Pod Rot - Vegetables

Sunken, irregular spots on vegetables is a symptom of a disease called Alternaria.
early blight (Alternaria solani)
Updated: September 1, 2021

Phytophthora of Vegetables

Phytophthora is a soil-borne fungal disease that may infect pepper, tomatoes, squash, cucumbers, and eggplant.
totally wilted squash plant infected with phytopthora
Updated: July 1, 2021

Late Blight of Tomatoes - Questions and Answers

Late blight can occur at any time during the growing season when the weather is cool and wet infecting tomatoes and potatoes.
late blight symptoms on leaves and fruit
Updated: May 18, 2021

Gray mold or Botrytis of Vegetables

Tomato blossoms can drop off plants for a few reasons. Gray mold or botrytis is one of them.
Symptoms (brown lesion) and signs (fungal growth) of gray mold on a tomato leaflet in greenhouse.
Updated: May 12, 2021

Bacterial Spot or Bacterial Speck on Tomatoes and Peppers

The symptoms of bacterial spot disease begin as small circular pimples on leaf undersides.
bacterial spot on a tomato leaf
Updated: May 12, 2021

Bacterial Leaf Spot on Peppers

Common Pepper Disease
bacterial leaf spots on pepper leaves
Updated: May 12, 2021

Late Blight of Tomato and Potato

Late blight of tomato and potato is a potentially destructive fungal disease in Maryland backyard gardens.
late blight infected stem and leaves on a potato plant
Updated: May 12, 2021

Bacterial Wilt of Vegetables

Bacterial wilt can cause sudden wilting of cucumbers, melons, and summer squash.
parts of a cucumber vine died from bacterial wilt