Category: Tree Rot and Diseases

Black spots on Silver Maple caused by Maple Tar Spot Disease / fungus
Tree Rot and Diseases

What Is Maple Tar Spot Disease?

Black Spots on Maple Leaves Can Be Treated Maple tar spot is one of the easiest plant diseases to identify. Most people can spot it even without knowing what it is: if you have seen round black spots on maple leaves, either in a tree or on the ground, you can identify tar spot. With

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Armillaria mushrooms growing at the base of a tree
Tree Rot and Diseases

Why Do I Have Mushrooms on My Trees?

Armillaria Mushrooms Can Be a Sign of Root Rot Mushrooms on trees may seem like a normal part of the ecosystem, but unfortunately, most of the time they indicate a problem. In the spring, you may see clusters of small brown-capped mushrooms growing at the base of your trees. These are armillaria mushrooms, also known

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Rotting roots at base of large deciduous tree Phytophthora root rot
Tree Rot and Diseases

Phytophthora Root Rot: What You Need to Know

Phytophthora Can Be Treated What is phytophthora root rot? Despite the tongue-twisting name, it’s a common issue in Ontario plants, but it can often go unnoticed. Phytophthora is a common disease in both landscape plants and crops in southern Ontario. Caused by an organism similar to fungi, also called a water mould (or oomycete), there

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