Magnolia Tree Leaf Disease

There are more than 200 different vanities of magnolia trees. Plants related to the magnolia family have been around for millions of years. Over time, they were able to build up an immunity to many diseases, but there are still some leaf diseases that can cause serious damage or kill the tree completely.

Spotted Leaf

Leaf spot can result from different types of fungal infections. The leaves will develop blotches that can be yellow, black or brown, and will fall off. Pick up the leaves and destroy them.

Leaf Blight

Leaf blight is caused by a fungus. It appears as threads on the back of the leaves. They will become matted and will stick together. Prune away the infected branches and disinfect the pruners.

Verticillium Wilt

Verticillium wilt is caused by a fungus that lives in the soil, and can be deadly. The leaves will look pale and wilted, and will fall off early. Branched will also wilt and die. Try a fertilizer high in nitrogen. If that does not work, dig up the tree and roots. Do not plant another magnolia tree in that spot.

Scales

Scales are caused by insects who suck the sap right out of the tree. Leaves and stems will develop small bumps. The leaves will not develop properly, and the tree will become weak.

Spider Mites

Spider mites attack the lowest leaves of a young tree. The leaves will develop yellow or red spots on the top, and/or a web will form on the leaves and stems.