The disease will be more severe if the leaves are frequently wetted, either by rainfall or by an irrigation system. If your sprinklers are hitting the plant's leaves, make adjustments to prevent this from occurring. A preventative fungicide spray will help control Entomosporium leaf spot, particularly if the photinias were affected last year. This disease can be difficult to control and new growth must be protected. Aphids, or plant lice, can be found on tender, new growth of all types of plants.
Aphids are small, soft-bodied insects that suck plant sap, often occurring in very large numbers.
There are several naturally occurring enemies of aphids which can efficiently reduce an a small infestation. Look closely to see if plants with aphids have any parasitized aphids. Parasitized aphids appear fat, motionless, and salmon-colored. Very tiny wasps lay eggs in the aphid bodies. A close inspection of parasitized aphids might even reveal a tiny exit hole where the new adult wasp emerged to continue the cycle of destroying more aphids.