I am new to this site as I just registered myself. I browsed a little and I see that there is a lot of knowledge and I hope I can find competent help. I have a tropical hibiscus that was given to my wife by our daughter on Mother's Day last year. Flowered all summer and until Christmas. Is now full of buds, but is loosing a lot of leaves. It has been happening since several weeks, but has new small leaves budding and growing therefore I did not pay much attention. I have now noticed that the leaves that start becoming yellow and start drying, have several black spots on the back. I have sprayed with benomil, which is a fungicide I used some time ago for my roses. Can somebody tell me if they know anything about hibiscus black spot and which is the best product to use to control it? Thanks in advance!
