A: Try a mixture of vinegar, salt and boiling water or you can use an organic herbicide. Make sure to read the label carefully.
A: Sounds like Anthracnose disease. Keep the canopy clean of leaves and twigs as they fall to prevent the spread of fungal spores. In the winter when the buds start to swell, apply a systemic fungicide but, once the disease starts, it is hard to eradicate and could overtime kill the trees.
Q: Our white oak trees are loosing some of its bark. The same thing happened 3 years ago. Are they diseased?
A: This is the natural process for white oak trees as they gain girth after recovering from drought. Seeing this in other areas of North and South Carolina.
A: From the description, probably phyllosticta leaf spot (fungus) which is common in maples. Water regularly, fertilize annually and, most importantly, rake up and dispose of fallen leaves since fungus overwinters in old litter on the ground.
A: We would suggest you go to two of the NC State University websites: www.turffiles.ncsu.edu and www.ces.ncsu.edu. Both are excellent resources.
Previously Asked Questions & Answers
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Union County, NC