Characteristic damage of fruit from wasp species. This was created from yellow jacket wasps Vespula maculifrons , but similar damage is caused by bald faced hornet and various other wasps and true hornets. Additionally, beetles and chafers can cause excavated cavities in the fruit like this. Although any loss to the crop is undesirable, these types of attack are often within acceptable tolerances. It should be remembered that hornets and wasps are helpful in the orchard since they are tireless hunters of pest species like lepidoptera. Hornets and wasps seldom attack people unless the nest is disturbed. In fact, while feeding they often completely ignore harassment.
Damage to apples from Yellow Jacket Wasp