Home / Tree Spraying    Tree Spraying Your trees are an important landscape asset. Trees, like any other living organism, are vulnerable to parasites and disease. At certain times of the year you may need professional help to keep them attractive and healthy. Gring Pest Control is the company that professional tree services call when tree diagnosis and treatment are needed. Both Davey Tree and Expert Tree Service use us to deal with tree infestation conditions found in the field. For decades Gring has been treating tree problems in the greater Bay Area. Our tree spraying equipment is unrivaled in the industry. This guarantees a thorough application. Consult the following list to assess your tree spraying needs. Oak Trees: Pit Scale - January & February Caterpillars - March thru May Aphids, Blight, Scale - March thru August Pine Trees: Borers & Beetles March thru October Alder Trees: Flathead Borer - May Ash Trees: Blight - March thru May Bay Trees: Scale - Any Time Elm Trees: Elm Leaf Beetle - June thru August Sycamore Trees: Blight/Mildew - March thru May Fruit Trees: Dormant Spray - Spring (after blossoms drop) Olive Trees: Growth regulator to help prevent olive growth - approximately March Juniper Bushes: Borers & Tipmoth - March thru July Most Other Trees, Shrubs, and Ground Cover: March thru September Copyright 2025 RGS Inc. All Rights Reserved.