I have a lawn infested with some kind of moth. They've been active since the spring but now I'm seeing small worm like caterpillars throughout the grass. Also the grass looks like it's been eaten. I'm pretty sure these moths are laying eggs in the grass and these caterpillars are their young but I don't know where to start treating. What can I use? I've got about 10,000 sq/ft of lawn they're in.

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