Infected trees are prone to break. Cut out cankers on limbs and remove trees with main trunks infected. Shortleaf pine is somewhat resistant. Fortunately, there are resistant varieties. Look for these varieties which are listed by flower color and height.
Whiteflies come out as temperatures climb.
Look now for their clear, flat, scale-like young on the undersides of leaves. They attack many plants but seem to go out of their way to feed on gardenia and yellow-leaf ligustrum. Once they start flying, spray twice two weeks apart with Orthene. Powdery Mildew likes humid weather but not rain. New growth turns white and powdery and leaves are distorted.