Soybean Pests

White Grubs

Overview

True white grubs are occasional pests of soybean seedlings. True white grubs are the immature forms of scarab beetles (May/June beetles) while annual white grubs are the larval stage of the masked chafter and Japanese beetles. Soybean fields formerly in sod or some other cover crop, or in set-aside the previous season are at higher risk of white grub infestation. Two or more live May/June beetle grubs per cubic foot of soil prior to planting may signal a potential problem.