We can blame the adult Codling Moth for the worms found in the apples in East
Idaho. Codling moth adults are about 1/2 to 3/4 inch long with mottled gray wings
that they hold tent-like over their bodies. The larvae from the moths penetrate into
the fruit and tunnel to the core, leaving holes in the fruit.

We recommend that you start spraying with Captain Jacks Spinosad in early
June. Spinosad is a compound derived from a bacteria originally found on
sugar cane. It is an organic pesticide used for codling moth larvae control (in
other words – worms in apples.)
With Spinosad you only need to mix at a rate 2 oz. per gallon
of spray. You should apply 6 times during the season , 10 days between
applications, up to 7 days before harvest.