If you have Japanese beetles infesting your garden areas, you may also have another infestation occurring beneath your feet. Lawn grubs are the small, white larvae that hatch from Japanese beetle eggs. The Japanese beetle life cycle involves these harmful beetles laying eggs beneath the soil of your turf grass. When the eggs hatch, tiny white grubs emerge in your lawn. These grubs will feast on the roots of your grass and may damage your turf grass considerably. Get rid of lawn grubs with quick action before they ruin your grass.
Measure an appropriate amount of trichlorfon insecticide for the size of your turf area--three pounds for every 1,000 square feet--and pour it into the hand or the push broadcaster.
Apply the trichlorfon insecticide over the turf area by spreading with the hand or push broadcaster. Ensure you apply the insecticide evenly and completely over the entire area.
Water the turf immediately to activate the insecticide. The water pushes the granular insecticide down through the grass to the roots where the grubs live. Provide water to saturate the lawn thoroughly but not enough to create puddles.