Tree Fruit Research & Extension Center

Cullage Assessment & Education

Quick Identification Guide to Apple Postharvest Defects & Disorders Cards

Arthropod Damage

The Arthropod section of the card set includes all the major insect damage found in Washington apples. This section also includes some mite damage. At a later date more cards may be developed for this section which would include other forms of animal damage, such as, bird pecks and rodent feeding, as well as, any emerging or reclassified disorders. Click on the tab above for the pest damage you are interested in viewing. For ordering information visit the Order Information section of Introduction. The cards shown on this site are slightly modified to accomodate web formatting. Figures may appear fragmented in some browsers. Please report viewing problems here. Any reproduction of the card images or content without permission is in violation of WSU Copyright policies.



ARTHROPODS: Codling Moth   

codling moth damage

Codling moth (Cydia pomonella) has become a serious quarantine pest for exporting apples. Some countries, such as Taiwan, require orchard or field bin sampling to ensure that fruit are codling moth free prior to packing.
Figures 1&2: The calyx and stem bowl must be checked carefully to detect holes.

codling moth damage

codling moth damage
codling moth damage
  Figure 3: “Stings” are unsuccessful entries defined as being under 1/8th inch deep; deeper holes are scored as “wormholes.”

Figure 4: “Wormholes” are tunnels into the fruit made by feeding larvae.
Figure 5: CM larvae tunnel into the fruit to feed on the seeds at the core before exiting through the same or a new tunnel.
Figure 6: To check for internal larvae the fruit must be cut vertically from stem to calyx through the core. Fungal or bacterial growth are common side effects.

codling moth damage




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