How To Kill Japanese Beetles
- Approximately 1/3 to 1/2 inch long.
- Metallic green head and thorax (the area behind the head) with copper-brown wing covers.
- Sides of abdomen have five white patches of hairs, and tip of abdomen has two patches of white hair.
- Start looking in your gardens and lawn late June early July
- Damaged leaves attract Japanese beetles so make sure your shrubs, flowers, and plants are treated
- Japanese beetles feed for six to eight weeks so it is important to continue management until their numbers decrease. Once they are present in large numbers, managing them becomes more difficult.
- Most feedings are finished by mid to late August.
- C-shaped, white to cream-colored grubs with a distinct tan-colored head.
- Legs are easy to see.
- From 1/8 inch up to about one inch long.
- Japanese beetle grubs look like other white grubs and can only be positively distinguished by examining the pattern of spines and hairs on the underside of the tip of the abdomen.
- Grubs chew grass roots and reduce the ability of grass to take up enough water and nutrients to remain healthy. When grub feeding is severe, dead patches of grass develop.
- Controlling Japanese beetle grubs is unlikely to reduce numbers of adults on landscape plants because beetles emerging from non-treated grass areas can fly considerable distance to preferred adult food plants. Only treat white grubs to protect lawns from damage.
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