Worm in apple color page3/30/2023 ![]() ![]() The females lay eggs on leaves and small fruit for about a month. Adults emerge from the cocoon in April or May. They spend the winter as a caterpillar in a cocoon, usually under loose bark on a tree trunk, debris under the tree or in some other protected spot. You need to understand their Life Cycle to successfully manage codling moths. A mature caterpillar is about 3/4 inch long.Ĭodling moth photo by Scott Bauer, USDA Agricultural Research Service, Though we all recognize "wormy" apples, the larvae are actually caterpillars. ![]() The tips of the wings are marked with copper lines and a gold or bronze spot. The larvae are white to light pink "worms" with a dark brown head. The codling moth is a gray moth 1/2 to 3/4 inch long with mottled gray wings that blend well with most tree bark. These include care of trees and fruit, trapping techniques, and beneficial insects. For best results, use a combination of techniques. Several effective, non-chemical techniques are available for home gardeners. ![]() They feed about three weeks, then tunnel out of the fruit and find a place to spin a cocoon.īiological control has been so successful for codling moth that chemical pesticide use has been greatly reduced. When the eggs hatch, the young caterpillars feed on the surface of the fruit for a few days, then burrow into the center. The Codling Moth lays its larvae on the developing fruit and leaves of apples and pears, and it can also attack walnuts. But if you take a big, juicy bite and see that the remaining apple in your hand has brown yuck and half a worm inside - and you just swallowed - it may be time to take out the artillery! It is such a satisfying experience to reach up into an apple tree and pluck a shiny apple from a branch. ![]()
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