Visit our sister site, BirdSong Nature Shop, for great prices on thousands of backyard birding items:
Since the grubs are normally protected by soil, most control steps are focused on controlling the adults before they mate. As soon as the adults emerge from the soil, spray the tree and all the plants and grass in the area with Bug Buster Pyrethrin Insect Spray. Repeat the spray every ten to fourteen days.
In cases of large infestations attacking mature trees, apply Once-A-Year Insecticidal Drench w/Merit early in the spring to help protect the roots against feeding by the grubs. If using Once A Year Drench, it is recommended to not consume the fruit during that growing season.