There are several types of root rot that can attack, damage, and kill trees, including Armillaria Root Rot, Phytophthora Root Rot, and Phymatotrichum Root Rot. These diseases are also known by many common names, such as cotton root rot, Texas root rot, mushroom root rot, oak root rot, and others across North America.

Symptoms:

• Dulling of normal leaf color and reduced tree vigor.

• Leaves may wilt and turn yellow or brown.

• Major branches may die or show excessive wilting.

• In fruit trees, fruit may be absent on lower branches, appearing only on upper branches.

• Roots may appear decayed; the lower trunk and cambium layer may have brown spots.

• Small white mushrooms or white fan-like plaques or strands may develop around the base of the tree.

If left untreated, root rot can cause rapid tree decline and death. Some trees may survive in a weakened state for months, while others may die quickly.

Recommended Steps to Control Root Rot:

• Remove dead trees and as much of their roots as possible to prevent spread.

• For newly infected plants, expose the base to air by removing 3 to 4 inches of soil.

• Treat root rot with Agri-Fos Systemic Fungicide.

  • If using foliar spray, repeat every 1 to 2 months.

  • Increase dosage and frequency for more advanced infections.