First spray usually is made in late June or July. If pheromone traps are used to time sprays, make the application 10 to 14 days after the first moths are caught. A second trunk spray may be required 3 weeks after the first. Surface scarring on stone fruits can be the result of many factors. Certain insects such as thrips deform and bronze flower buds and blossoms.
Thrips can scar fruit by feeding on or laying eggs in the fruit.
Most significant damage usually occurs during and shortly after pollination. Lygus and stink bugs also damage stone fruit at this time. Sometimes only portions of orchards or border rows are damaged. Best timing to prevent damage also coincides with pollination periods. Even though some varieties may be wind pollinated, bees can boost yield, often are present, and must be protected.