Field notes - Northern Red Oak

Northern Red Oak
11" DBH
25' H

Diagnosis-

1. Oak skeletonizer
2. Fungal canker
3. Environmental stress

Oak with internal section die back.

  Signs of an Oak Skeletonizer

•  Leaves are rolled and stuck together in a type of nest.
• Inside the leaves are a yellow worm like caterpillar.
• Leaves are stripped leaving only the veins.

Nest from an Oak Skeletonizer

In the center is an Oak Skeletonizer

Oak Skeletonizer

The stripped leaf from an Oak Skeletonizer.

A nest from an Oak Skeletonizer

• The under side of the leaves are covered in the eggs of the Oak Skeletonizer.

Signs of an oak fungal infection

• The bark at 10' to 15' has lichen and moss. 
• At 3' is a oozing fungal canker.
• Internal die back.

Signs of Evironmental stress.

• The leaves falling off the tree. 
•  Piping for irrigation cut to close to the base if the tree.
• Ground cover absorbing nutrients and water needed for the tree. 
• The soil was very dry. 

Treatment-

• Oak Skeletonizer- spray with Bifenthin (Talstar)
•  Fungal Infection - Basal injections of Reliant
• Enviromental stress- Fertilization, Aeration and Vertical mulching.