Vegetable Diseases

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Updated: June 28, 2021

How to Identify, Prevent, and Manage Plant Problems

How to ID, prevent, and manage plant problems in Maryland
no lawn landscape
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
Updated: May 12, 2021

Septoria Leaf Spot of Tomatoes

Septoria leaf spot starts on lower leaves of tomatoes as small, circular gray lesions (spots) with dark borders.
closeup of tomato plant leaves with septoria leaf spots
Updated: May 11, 2021

Early Blight of Tomatoes

Early blight is a very common foliar disease of tomato plants that can result in defoliation and reduced yields.
early blight disease lesions on tomato leaves
Updated: May 11, 2021

Verticillium Wilt of Vegetables

Symptoms of verticillium include older leaves turning yellow, dying, and dropping off infected plants.
leaf spot symptoms of verticillium wilt