White Grub Management in NE GA Pastures & Fields

Producer Bulletin
White Grubs (May/June Beetle Grubs)
Management in Northeast Georgia Pastures & Hayfields

By: Gilbert Barrett, President/CEO, White County Farmers Exchange

Introduction
White grubs, the larval stage of May/June beetles (Phyllophaga spp.), can reduce forage
production by feeding on grass roots. This bulletin summarizes identification, scouting,
treatment expectations, and long-term management for Northeast Georgia producers.

Identification & Life Cycle
May/June beetles generally require two to three years to complete their life cycle. Large
second- and third-year larvae are the most damaging and the most difficult to control.

• Field Symptoms
   Yellow or thinning patches
•  Grass pulls up easily
•  Reduced hay yield or grazing
   Wildlife digging for grubs

Scouting & Treatment Decision
Question                                                     Recommendation
Are roots damaged?                                   Dig and inspect for grubs.
Less than 8 grubs/ft²                                   Monitor; treatment usually not justified.
8–10+ grubs/ft² with damage                     Consider labeled treatment.
Wildlife digging only                                   Confirm grub population before spraying.

Treatment Expectations
Carbaryl (Sevin) remains one of the few insecticides with labeled uses for certain pasture and forage situations. Always verify the specific label and follow grazing and haying restrictions.  Control of large May/June beetle grubs is often inconsistent; complete control should not be expected.

What NOT To Do
 Do not rely on pyrethroids for soil-dwelling white grubs

 Do not spray without scouting

 Do not expect rescue treatments to eliminate older grubs

Homeowner Turf Recommendations
Preventive: chlorantraniliprole (Acelepryn), imidacloprid, clothianidin.
Curative: carbaryl (Sevin) or trichlorfon (Dylox)  According to turf labels. Water in after
application.

Need Help?
Contact White County Farmers Exchange for assistance with pest identification, forage
recommendations, soil testing, and integrated pasture management.