Honey locust trees are wide, leafy trees that turn vibrant colors in the autumn before shedding their leaves. The trees are fairly hardy overall, but like any other tree run the risk of tree disease. If you have honey locust trees and want to preserve the health and beauty of the trees, watching for and treating disease is imperative.
Here are three common diseases that strike honey locust trees – and how you can prevent further damage.
1. Canker Disease
Canker disease is a common tree disease caused by fungi. The most obvious symptoms of canker are open sores in the bark that can be reddish around the edges. The bark within the canker will likely turn black at some point and the hole can start to seep a sap-like material.
Most types of cankers are not fatal and can be treated by calling in a tree trimming service to remove the damaged areas. It is important to use a qualified tree service, as accidentally nicking or damaging the branch can cause the canker disease to spread on to that newly damaged area.
There is one type of canker disease that can be fatal to the tree so it is important to call in a specialist for a proper diagnosis.
2. Annosus Root Disease
Annosus root disease, also called root rot, tends to enter the tree through damaged branches. The disease is able to spread to the roots, where the disease kills off healthy material until the tree is no longer secured to the ground and can topple over in the wind. Symptoms are usually general signs of ill health such as early leaf browning and death so it is important to have a specialist look at your tree whenever anything seems to be amiss.
Root rot isn't curable and you will need to call in a tree removal service to completely remove your honey locust tree. The removal should prevent the rot from moving on to other trees. You can also have the tree service trim off any damaged branches of neighboring trees to make sure the root rot doesn't jump over to the neighbors.
3. Powdery mildew
Powdery mildew disease is largely a cosmetic issue and doesn't pose substantial threats to the overall health of your honey locust tree. The defining symptom of the disease is a white-gray fuzz that develops on the surface of the leaves. The fuzz can grow to the point of fully coating the leaves, which will then make the leaves drop off.
Powdery mildew is treatable with a fungicide applied to the healthy areas of the tree. Allow the affected leaves to die off and then apply fungicide to any new regrowth to prevent the mildew from returning.