Green June Beetle Grubs in the Pool: Nightly Invasion

Hundreds of grubs drowning in the pool nightly are green June beetle larvae. Unlike Japanese beetle grubs, they feed on thatch, not grass roots. Their tunneling dries soil, and mature grubs surface at night, accidentally falling into pools.

Control

• Apply grub control granules in a 20-foot band around the pool now.
• Next July, use imidacloprid (Bayer Advanced Grub Control) or halofenozide (Mach 2).
• Water in after application.

See Green June Beetle Grubs.