Symptoms include brown or black spots on the leaves. The bacteria are waterborne, so it usually comes from water splashing from an infected plant onto another. Blight mainly affects trees that are under stress, so in times of drought or in the absence of proper nutrients blight can step in and wreak havoc. Leaf Blight Leaf blight shows up in the form of small black spots on the infected plant.īlight is caused by the bacterium Pseudomonas syringae and affects several different types of trees.
If the tree is young and the fungal infection is very advanced, it may not be possible to rescue it.
Using these two methods in conjunction with one another should do the trick. A copper-based fungicide will also help to control the spread but must be used early on as it won’t kill the fungus, but rather will control it’s spread. If you can identify these black/purple spots or the canker-like appearance of the progressed spots, you know you have this fungal infection. If you notice leaves dying, examine leaves that are adjacent, but still green. The disease is typically not fatal to mature trees, but it can be to young trees that are not yet established. As the disease progresses, the spots my enlarge and develop a white center and a pale halo. Phyllosticta magnoliae fungus affects the foliage of a magnolia tree by causing small purple or black spots on the leaves. Phyllosticta Leaf Spot Leaf spot is generally fairly easy to diagnose.
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