| IPM scouting in Michigan apples > oriental fruit moth |
Three full generations of Oriental fruit moth (OFM) occur in Michigan, and sometimes a partial fourth.
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| Adults are about 5 mm long, gray-colored
with wavy, light lines on wing surface. |
Mature larva is about 10 mm long,
creamy-white to pink, with a brown
head capsule. Anal comb is present. |
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| Use 1 trap per 10 acres to determine biofix for each generation. Time treatments for 250 degree days base 42, past biofix. |
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| The following OFM degree day model provides the predicted egg hatch time periods for all three generations of OFM. Please note that this model is base 45. Treatment thresholds based on trap catch, as with codling moth, have not yet been developed. Where warranted, first control measures should be timed for the beginning of egg hatch for each generation. Where necessary, additional control measures should be applied according to the expected residual effect of the chosen control material. |
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| View current Michigan growing degree day accumulations at Enviro-weather. Select a weather station from the map that is closest to your location. Then click on "fruit" for a list of weather resources and models for fruit production. |
| Codling moth and Oriental fruit moth larvae cause similar types of fruit damage. Both will enter fruit from either the calyx end or from the side of the apple. Find more information about the codling moth. |
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CM feeds in the center of the fruit on
flesh and seeds. OFM generally feeds
on flesh away from the center, but can
occasionally feed at the center as well. |
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Mature larvae of OFM can be
differentiated from CM larvae by
the presence of an anal comb
located ventrally at the posterior
end
of a larva. The comb can be
seen with a hand lens. |
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- For more monitoring information and evaluation of available pesticides:
Michigan Fruit Management Guide
- A Practical Guide to Scouting Apple Orchards – a DVD showing how to scout apple orchards.
- MSU Diagnostic Services for assistance in pest identification.
- MSU Fruit Crop Advisory Team Alert newsletters for current pest/crop conditions.
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| This information was developed from A Pocket Guide for IPM Scouting in Michigan Apples by David Epstein, Larry J. Gut and George W. Sundin. Purchase this in a pocket-sized guide for reference in the orchard from MSU Extension (publication E-2720). |
