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The projected date (250 DD after biofix) for the first cover spray is coming up soon. The first cover spray should be applied on, or a few days before, the listed date. Listed dates are May 24 for Ogden, May 26 for Payson, May 28 for Bountiful, Orem, Provo, Salt Lake City and Spanish Fork, May 29 for Genola and Perry, May 30 and later for other sites. Dates for specific areas not listed can be found on the internet at http://extension.usu.edu/ipm/spraydd.htm. Those who do not have a crop to protect due to the freeze, do not need to spray. There is no advantage to spraying for codling moth when there are no fruit to protect. It will not hurt your trees, or next years crop, by not spraying codling moth insecticides this year. What to use: * Home orchards: Imidan (Phosmet) - 24 hour re-entry interval (REI) and 7day pre harvest interval (PHI) for apple or pear. Reapply every 18-21 days Sevin (Carbaryl) Reapply every 7-10 days. Diazinon - reapply every 10-14 days Malathion - reapply every 5-7 days Success (Spinosad) - a new product; not as effective as phosmet. Available? Surround (Kaolin clay) - a new product; not as effectiveas phosmet. Available? Pyrethroids or pyrethrin - pyrethrin provides protection for a very short time (has a very short residual life). Note: Pyrethroids are very toxic to pollinators, beneficial insects, and predaceous mites; so use with caution. Fireblight and cherry powdery mildew are also active in commercial orchards log onto the website for more information. Larry A. Sagers Regional Horticulturist Utah State University Extension Thanksgiving Point Office
