UC Cooperative Extension Ventura County
669 County Square Dr. Suite 100
Ventura CA 93003
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Fungi on Camellias
There are several fungi that can produce a flower rot in camellias. The Botrytis gray mold fungus and a Sclerotinia white mold fungus are the most likely causal agents. Many treatments have been tried to manage and control camellia flower blight. To date none have been completely successful. The spores of the above fungi are airborne and can travel a mile or more on the wind. Moist spring rains and our ever-present foggy conditions and mild temperatures provide an ideal environment for these pathogens to infect and damage flowers. So, even if you are very careful to keep diseased flowers picked up and keep your plant sprayed with fungicides, the chances of continued occurrences of flower blight are still high.