The Q&A Archives: Weeping Katsura

Question: We have just noticed that our 3 year old katsura has black spots on the leaves and they appear to be curling up and dying. We live in zone 5 and have no problems at all with this tree. We wondered what you thought and what can we do? Thank-you, Ruth Smith

Answer: I apologize if you receive a duplicate answer, the system seems to be glitching a little bit as I just sent out an answer to your question but it has reappeared. Based on the information in your question I am not able to make a diagnosis; there are no "usual culprit" diseases with this tree because it is generally considered to be quite pest and disease resistant. I would suggest you consult with your local Cornell cooperative extension to obtain a specific diagnosis and based on knowing that, determine how to proceed. If a chemical control is needed, they will have the most up to date information on what ot use and when/how is best to apply it for maximum results. In the meantime, clean up any fallen foliage/twigs and dispose of them in the trash to try to limit sources of reinfection; do a thorough clean up this fall for the same reason. I hope it is nothing too serious.

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