Apple Maggots

Apple Maggot

Primarily found in apples, this destructive pest will also attack plum, apricot, pear, cherry and hawthorn. Learn proven, organic methods for controlling apple maggots here.

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Slightly smaller than a housefly, adult apple maggots (Rhagoletis pomonella) are 1/5 inch long and have conspicuous black bands — resembling a W — running across their transparent wings. The larvae (1/4 inch long) are white, tapered maggots that tunnel throughout the flesh of fruit. They are often found in large numbers and can quickly reduce a beautiful apple to a brown, pulpy mess. External signs of maggot infestation appear as pinpricks made on the apple surface. These are often small, distorted or pitted areas.

Life Cycle

The apple maggot overwinters as pupae in the soil. Adult flies emerge in late spring and begin to lay eggs just under the apple skin. The eggs hatch, and the larvae begin to tunnel through the fruit. When mature, the maggot leaves through a small opening made in the side of the fruit and enters the soil. One or two generations per year.

Control

  • The majority of maggots leave the fruit several days after it has fallen from the tree. As a result, a certain level of control can be achieved by picking up and discarding the dropped apples.
  • Red Sphere Traps will greatly reduce damage and work well to capture and reduce the number of egg laying adults. Traps should be placed within the canopy just as trees are finished blooming. Hang spheres high in the brightest areas of the tree, 6-7 feet from the ground. Set out one trap for every 150 apples (2 traps per dwarf tree).
  • Beneficial nematodes are microscopic, worm-like parasites that actively hunt, penetrate and destroy the pupal stage of this pest. For best results, apply in the early spring or fall around the base of trees, out to the drip line. One application will continue working for 18 months.
  • Surround WP — made from kaolin clay — will suppress a broad range of insects and has shown over 90% control of apple pests. It also has a positive effect on fungal diseases like fire blight, sooty blotch and flyspeck.
  • Fast-acting botanical insecticides should be used as a last resort. Derived from plants which have insecticidal properties, these natural pesticides have fewer harmful side effects than synthetic chemicals and break down more quickly in the environment.

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