Leave nitrogen rich clippings behind to degrade into soil building compost. Scatter or rake up any large clumps of clippings for use as compost or mulch. Grass clippings, compost and manure are better answers, returning needed bacteria and enzymes to the soil along with nutrients. Including clover or other nitrogen fixing plants in your lawn can make it self-fertilizing. Healthy lawns don't have insect problems.
Weed killers can harm gardens, trees, shrubs and breed resistant weeds.
A quick mow fixed that. In August they're the only green in most lawns. Cut-back or eliminate the use of high nitrogen fertilizer. Reseed bare spots. Compacted soils promotes weeds.