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Codling moths have been detected in most areas of northern Utah. We have included two options for treating first generation larvae:
1. The "typical" starting spray date is at approximately 1% egg hatch. The first cover should go on at about this time, and the second cover should occur during the period of "greatest egg hatch." At this time period, 50% of all the eggs are hatching, so it is important to make sure the fruit is well protected.
2. Growers may choose a second option, and that is to apply horticultural oil (1%) as an ovicide before eggs start hatching. By applying the oil, all eggs that have been laid will be killed. This option "delays" the 1% egg hatch timing by about 7-10 days. Oil is less expensive than many of the newer codling moth insecticides, and so this option could result in some savings.
Use this link for the latest information.
For entrance to the general website go to http://utahpests.usu.edu
