How to Kill Night Beetles
- 1). Treat the grass where night beetle grubs live to kill the grubs before they turn into adults. Use an insecticide designed to kill beetles or use Bacillus thuringiensis to kill the grubs. Sprinkle the lawn with the insecticide using about one pound per 10 square feet. Water the lawn for about 30 minutes after applying the insecticide to cause the insecticide to seep into the ground where the grubs live.
- 2). Make a trap for the bugs near any outdoor light source. Fill a jar about one or two inches with vegetable oil. Place a small lamp with a white bulb above the jar. The beetles will fly into the light and fall into the oil, which will kill the beetles.
- 3). Encourage birds to live in your yard to eliminate the beetles naturally. Build bird houses for purple martins and other birds that eat a large quantity of insects. Place several bird feeders throughout the yard and ensure dogs and cats stay out of the yard to encourage birds to linger.
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