Diseased Leaves On Michelia Champacas - Knowledgebase Question

Del Mar, CA
Question by mweiner
January 19, 2003
During the early fall, I had seven "new" Michelia champacas planted. One tree looked sickly (paler, droopy, losing leaves) immediately, but seemed to perk up a bit. Now it looks sick again, and the remaining trees have developed blackened areas and other miscolorations. One is also starting to drop leaves, although none look as bad as the original sickly one. What is going on? And what should I do? I live in zone 24, and our weather so far this winter has been warmer than usual. Thanks!


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Answer from NGA
January 19, 2003

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Michelia is a member of the magnolia family and as such is susceptible to the same fungal leaf blights and leaf spots as magnolia. Plants under stress are most likely to develop insect and disease problems. Stress can be a result of transplanting, exposure to too much or too little sunshine, over- or under-watering, or too much fertilizer. Your first course of action should be to take a specimen of the problem to your local Cooperative Extension office or Master Gardener Clinic to get a positive identification of the problem. Once the problem has been diagnosed, you'll be given some control recommendations. Phone 619-694-2845 for the location of your nearest diagnostic clinic.

Best wishes with your trees!

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