Japanese beetles are one of your lawns biggest summer pests! They eat their way through the roots of your grass and leaves on your trees. It seems like their stomachs are never full.
Think You Have Japanese Beetles?
Japanese beetles are easy to spot in your lawn. They have a bronze back, metallic green head and are about 0.5” long. You’ll see them eating almost every plant in your yard. As a matter of fact, Japanese eat over 300 different plants but their favorite plants are roses and trees.
The Life Cycle Of The Japanese Beetle
Japanese beetles lay grubs about 3 inches in the ground in July. One female beetle can lay anywhere between 40 to 60 eggs.
In late mid to late summer the eggs begin to hatch and turn into grubs. From late summer to early spring, grubs spend their time about 4 to 8 inches deep in the soil.
When spring arrives, grubs return to the turf and begin feeding on roots until late spring when they start turning into full grown Japanese beetles and begin feeding on your trees.
Sure Signs You Have Grubs
Grub symptoms includes:
- Discolored or wilting grass that initially looks like drought damage
- Damage along roads, driveways and sidewalks
- Spot of dead or dying grass in early spring or early fall
- More skunks, raccoons and moles in your yard as they love to eat grubs
- Areas of grass that you can easily lift or roll back because the grubs ate the roots
- White c-shaped grub larvae under your grass
When To Treat For Grubs
If you see grubs in your late summer or early fall, that’s the best time to treat and control them. Come spring, the grubs are much bigger and almost ready to grow into beetles, plus the eggs have already been laid.
Products with an active ingredient of either diazinon or dylox are great for controlling and getting rid of grubs.