Earlier this summer I had significant dead lawn spots in my wet lawn last year, which are completely recovering. However, I now am getting thousands of crane flies on my lawn. I read this article here: https://www.canr.msu.edu/news/european_crane_flies_observed_around_lawns_and_homes_in_southern_michigan Based on this article, I'm now believing I had a crane fly larve infestation 2020 Spring, which was the cause of my dead areas which are now recovering. I've never seen this many crane flies in one area. There are thousands in the grass when you walk right now (September) there is a small cloud of crane fly activity around you. I'm noticing the flies are all mating and the grass which is growing back has many many adult flies crawling around in it. The article says: Timing is critical because these are same products that are used for grub control and, if timed properly, one application will protect against both European crane fly and white grubs (Japanese beetle and European chafer). However, if your grub control insecticide is applied too early (in April, May, or June) it may not work for European crane fly in the fall. What should I do RIGHT NOW? (apply some product?) if Anything. My address is in Hudsonville Michigan. Or should I do nothing now, and wait until next Sprint applying Sevin? Rhe "timing is critical" confuses me since it isn't clear if applying Sevin next spring will kill the grubs next spring and if so exactly when? Please help, I look forward and thank you in advance for your prompt response!