The Q&A Archives: Rust On Weeping Mulberry Leaves

Question: I planted a young weeping mulberry this spring. It does have new growth, which is green, but lately I have noticed many of the original leaves have rust around the exterior. They do not have holes, just this brown dried up look. I have watered the tree,and just recently sprayed it for any insects. I have not seen any bugs. Is this rust normal? No leaves have fallen off.

Answer: Unfortunately, based on your description I am unable to determine whether the leaves are showing signs of transplant stress or water stress, or if there is a pest or disease at work. You might wish to take a sample to your county extension (790-5721) for a more specific diagnosis and suggested steps to take. In the meantime, make sure that the soil ball where the original roots are is kept evenly moist but not soaking wet, and also make sure that the surrounding soil is kept evenly moist but not soaking wet -- sometimes the original root ball dries out much faster than the native soil does. I'm sorry I can't be more helpful.

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