- 1). Walk on the grass wearing lawn-aerator sandals. According to Sandra Mason of the University of Illinois Extension Office, the spikes on these sandals pierced an average of two lawn grubs per inch when University of Colorado Researchers walked the lawn three to five times wearing them.
- 2). Keep your lawn healthy. In a Michigan State University Extension Office fact sheet, George Silva explains that watering your lawn regularly, cutting it and removing dry and dead grass strengthens it against grub infestation. If you use pesticide, Silva suggests you apply it only to the areas where you see grubs.
- 3). Apply organic pesticide to your lawn. To kill Japanese beetle grubs, use a drop spreader to add bacillus popilliae, sold as milky spore and bacterial spores, to the lawn. Apply them once in the spring, summer and fall for two years. You can also spray parasitic nematodes to control other beetles' grubs. The manufactured product (Grub Away) comes as a gel that you dissolve in water before spraying on the lawn.
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