Honeydew on apples is deposited by aphids and certain other sucking insects. This sticky substance is a favorite medium for the growth of sooty mold, which sometimes covers much of the surface of the fruits. Although this mold is superficial and usually does not affect the internal condition of the fruits, it detracts from their appearance and monetary value.
Sooty mold is not a problem if orchard insects are properly controlled. Consult the State agricultural extension service or experiment station for the recommended spray schedule.
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