Answer: Whew! I'm glad you used an insecticide and not an herbicide! Grubs feed on the roots of the lawn and without roots, the grass will dry out and die. I think the drying out has more to do with grub feeding than with the product you used. See if you can pull up the grass. Grub damaged lawn will roll up if you try because there will be no roots. If you can't roll it up, then it is firmly rooted and you may be able to salvage it by applying lots of water. Or, you can aerate your lawn. A core aerator will remove one inch by three inch plugs from the lawn. Leave the plugs on the lawn and they will dissolve in rain or water from the sprinklers. After aerating spread a thin layer of sand or compost over the area and water it in well. The sand or compost plus the soil from the plugs will work their way down into the holes left by the plugs. This will encourage more root growth. You can then overseed your entire lawn, water and fertilize on a regular schedule and it should green up. Turfgrass needs about an inch of water a week to maintain health. You can water twice a week in the hot weather as long as you apply the water for a long enough period that it has a chance to percolate down and wet the ground deeply. This will encourage deeper root growth and your lawn will remain green even in hot weather. I hope this information helps!
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