Diseases Diseases

How To Treat Magnolia Tree Diseases

Published at 03/26/2012 22:03:23

How to treat magnolia tree diseases


Magnolia trees are landscape and garden trees that are flowery and bright. Most of the magnolia trees are hardy and resistant to the many types of diseases and pest infections. However, just like other plants and trees, they are often attacked by different types of diseases that are caused by different factors. Most of the magnolia tree diseases can be controlled through early diagnosis of the disease and taking the necessary precautionary measures. The following are the different types of magnolia tree diseases and their treatment methods.

Step 1

Leaf blight

This disease is among the most common magnolia tree diseases. It is fungus disease that attacks most of the young magnolia trees. It is characterized by thread like appearance on the underside of the leaf, the affected leaves appear to be matted and they stick together. This is disease should be prevented from spreading through proper pruning with tools that have been disinfected with fungicides to ensure that no infectious diseases are spread through the equipments. Isolate the affected leaves and burn them.

Step 2

Leaf spots

They are caused by different fungi and bacteria known as the Pseudomonas. It like wet conditions and it is characterized by tiny purplish or black spots on the leaves that have a white center and a purple edge when matured. It is treated by providing good ventilation to the tree through pruning and spraying the affected tree with multidimensional fungicides.

Step 3

Magnolia scale

This is among the serious magnolia tree diseases. It attacks young branches and if not taken care of on time it can kill them. Its symptoms include hollowed out branches, slender stems blend off before dyeing and the leaves look underdeveloped. It can be treated by spraying the infected tree with horticulture oil if the tree suggests scale feeding and the stems should be sprayed with a mixture of soap, horticulture oil and water. The spraying should be done severally to ensure that the disease goes away completely.

Step 4

Black soot

The sooty mold grows on the sticky residue that is produced by the scale insects. This disease is more prevalent in the warm humid conditions. The sooty molds tend to interfere with the photosynthesis. It is characterized by round waxy bumps that are brown in color and presence of small black insects. It can be cured by attacking the scale insects and the disease itself. Spray the infected tree with insecticidal soap and an insecticide that will fight the scale insects and get rid of the sooty mold.

Step 5

Powdery mildew

This is a fungal disease that is spread by spores during times of high humidity and causes white spots to appear on the magnolia tree. The affected leaves should be separated from the rest and the ground around the trees as well. The tree should then be sprayed with fungicides that will destroy any remaining spores and stop the fungus infection from spreading.


  • Always select the magnolia trees that are strong and resistant to some of the magnolia tree diseases.
  • Make sure you inspect your trees daily so that you can be in a position to notice the magnolia tree diseases early.
  • Always read the instructions before using any type of fungicide.