This is the time of year I receive calls and emails concerning the use of dormant oils and, although I have written on this topic several times in the past, I feel this subject matter deserves a review. Horticultural oils have been used in agriculturefor over 100 years to control various soft-bodied insects such as scale, aphids and mites. These horticulture oils can be used on pecan but because pecan and ALL members of the Carya (hickory) genus are considered oil sensitive, the use of any oil on pecan is restricted to the dormant season. A few other species of trees that are considered oil sensitive include black walnut, junipers, cedars, redbud and maples, to name a few.
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