Description

Grubs are the larvae of Japanese beetles, June beetles, chafers, and other beetles. They are C-shaped, off-white in color with a dark head. Newly hatched grubs feed aggressively on the roots and tubers of plants, causing them to wilt or even die. Damage is most noticeable in late summer and fall. If the damage is not too severe, the plants may recover with normal watering and feeding.

In small populations, grubs are not a problem in a healthy landscape. Four to six grubs per square foot probably won't cause any visible damage. Problems may occur when there are more than six grubs per square foot of lawn. If skunks, raccoons, and birds are digging up the landscape to feed on the grubs, consider treating your landscape. Ten or more grubs per square foot will likely cause damage, especially if the plants are otherwise stressed.

What To Do and Helpful Tips

• Regular feedings provide the nutrients your gardens need to grow strong to better protect themselves from insect damage.
• In garden areas where annual flowers or vegetables are planted, till the soil deeply in the fall and allow birds and other animals to eat the uncovered grubs.
• In vegetable gardens, rotate plants that grubs prefer, such as potatoes, with plants that are less attractive, like beans.