Answer: I would certainly contact your local Cooperative Extension office for help. Maples are susceptible to a disease called verticillium wilt in which the leaves suddenly wilt. Helpful people at the Extension office can do some tests and inspect the plant tissues microscopically to provide answers to the problem. Contact the horticulture department of University of California Cooperative Extension, 1720 S. Maple Ave, Fresno (559-456-7285). Best wishes with your maple!
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