The adult flies leave the soil the next year. Infested fruit is not harmful to eat but has considerably less appeal. Control Tactics Homeowners can control blueberry pests several ways. Biological Controlling pests with other living organisms, such as predators and disease, is called biological control. Predators, such as ladybird beetles, and parasites can be more effective if you provide conditions that favor these creatures.
Many pesticides are more toxic to the beneficial insects than to the pests they are used against.
Therefore, you must carefully consider the potential benefits that will be lost if you apply insecticides. Ladybird beetles, praying mantids and lacewings can be bought from some nurseries or other plant dealers. Ordering eggs rather than adults is preferred, because many of these insects will disperse as adults, leaving the area in which they are released. Little is known about management techniques that might enhance the activities of these parasites. The effectiveness of the predators, however, can be increased by using fewer insecticides and by providing vegetative ground cover where some stages may live overwinter.