They remove fluid from plant tissues. Plant bugs frequently cause spotting on leaves, or the death and loss of buds. Leafhoppers frequently carry plant viruses that infect leaf tissue and result in additional injury symptoms. Nymphs hatch in the spring as new leaves appear. There are two generations per season.
Damage appears as yellow spotting on leaves.
Severe feeding may result in deformed leaves and possibly defoliation. Control is justified when leaf injury is easily found throughout the canopy. Damaged leaves turn brown and drop early, especially during dry weather. Two generations occur each year. Scale Insects Female scale insects have a protective covering of wax that is secreted from their bodies.