Question: “There are a couple good possibilities. Nematodes work to kill the larvae before they become bugs. If you live in a warmer climate, they will breed and you’re done. Zone 5 or northward, you’ll have to reapply.”
Another possibility is dish soap.
Mix about 1 cup of cheap dish soap with a gallon of water, put into a pump sprayer and spray that on the lawn.
Most soaps are biodegradable and pretty safe. They’re highly recommended by vegetable gardeners who need an insecticide that’s safe on food.