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Dogwood Tree Diseases

Anthracnose & Decline

  • Symptoms

    • Brown spots up to 1/4 inch in diameter go entirely through the leaf and have reddish-brown halos. Tiny, dark-brown fungal fruiting structures dot the brown areas. Small, reddish-brown spots without brown centers may pepper portions of the leaf or extend along veins. Also, large, brown blotches of dead tissue may occur on leaf tips, along the margin of leaves, or between the veins. Leaves on branch tips may be completely blighted and remain attached over the winter. Reddish-brown dead spots occur on the flower bracts. Lower twigs and branches die. Small, raised, pimple-like fruiting structures form on the dead twigs. Water sprouts form along the trunk of severely affected trees. The entire tree may be killed over a period of years.
  • Management

    • Prune and destroy dead twigs and branches during dormancy and when observed during the growing season. Protect trees from drought stress, winter injury, and dogwood borer attack. Rake and destroy fallen leaves. ZeroTol Fungicide is a ready to use spray that provides immediate control for anthracnose on roses and other shrubs. It leaves no chemical residue behind, which makes it the natural choice for use around pets! 

 

Anthracnose on Leaf and Bracts
Anthracnose on Twig & Twig Die Back

 


 Leaf & Flower Blight

  • Symptoms

    • Irregular, brown, wrinkled patches form on flower bracts and leaves in the Spring. Patches of gray mold grow on the patches if the weather remains very humid.
  • Management

    • This disease occurs only if weather conditions are very wet and humid in the Spring. Warm, dry weather will curtail the disease. Apply ZeroTol Fungicide Bactericide to help control and eliminate Blight.

 

Dogwood Leaf Blight

 


Crown Canker

  • Symptoms

    • Leaves are smaller than normal, light green, and exhibit premature fall leaf coloration. Twigs and large branches die as a canker forms at the base of the tree. The canker slowly girdles the tree. During this time, the tree flowers and fruits profusely but eventually dies.
  • Management

    • Remove the infected tree and do not replace it with another woody ornamental until the soil has been fumigated and aerated. Apply mefenoxam to nearby dogwoods to protect them from invasion.

 

Dogwood Crown Canker

 


Powdery Mildew

  • Symptoms

    • White fungal growth develops on the surface of leaves late in the Summer and during Autumn.
  • Management

    • Apply PureSpray Green. It provides a safe and effective way to control powdery mildew. BUY NOW! OR ZeroTol Fungicide/Bactericide is a very effective way to control any type of mildew on trees and ornamental shrubs. It is an ALL natural product that is safe for the environment!

 

Powdery Mildew

 


Septoria Leaf Spot

  • Symptoms

    • Angular gray to brown spots with yellow or dark purple halos form on leaves. Spots can be up to 1/4 inch in diameter. Small dark brown fruiting structures of the fungus are visible within the brown spots.
  • Management

    • Apply PureSpray Green. It provides a safe and effective way to control leaf spot. BUY NOW!

 

Septoria Leaf Spot on Dogwood

 


Spot Anthracnose

  • Symptoms

    • Reddish-Purple spots on flower bracts are up to 1/10 inch in diameter. Leaf Spots are circular to angular dark-purple areas less than 1/32 inch in diameter and often drop out, leaving shot holes. Spotting can occur on twigs and fruit also.
  • Management

    • Prune and destroy dead twigs and branches during dormancy and when observed during the growing season. Protect trees from drought stress, winter injury, and dogwood borer attack. Rake and destroy fallen leaves. ZeroTol Fungicide is a ready to use spray that provides immediate control for anthracnose on roses and other shrubs. It leaves no chemical residue behind, which makes it the natural choice for use around pets and children!









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