Camellias can be subjected to this type of attack which is clearly manifested by rust stains on leaves and flowers: in this case try a pruning in the initial phase of the attack or contact your gardener for a specific pesticide treatment.NON-MORTAL DISEASES
the first, more widespread and more odious, is certainly the desiccation of the petals. It is caused by the ciborrinia camelliae fungus, a parasite that attacks only the camellia and that does not propagate on shrub or foliage but only the flower. It shows a brown stain and a gray fluff that attacks the flower and makes it fall within a very short time. In its place a black sclerazio will appear: it is he who allows the mushroom to remain alive, to overcome the winter and to return active the following spring (this process can be repeated for five years). There are no specific products for this disease but prevention is needed: cover the base of the camellia with a cloth or sprinkle the earthy surface with pine needles. Also in this case the timely pruning (including sclerotia) of the first attached flowers can be the only winning weapon to fight and eradicate the ciborrinia camelliae.
Another non-fatal disease of camellias is made up of leaf galls: the fungus that causes them is exobasidium. This kind of minor infection attacks the buds in the spring. To eradicate it, it is simply necessary to eliminate the gems that have fallen to the ground (the fungus does not usually attack more than two) to make it no longer proliferate. No fungicide treatments are needed, which could even be too aggressive or deleterious, especially in spring. For collar galls, camellias are rarely affected and timely pruning is enough to get them back to perfect health.