Army Worm Cycle

Ok. I know this little nemesis gets a lot of mileage on the board this time of year But, I had my coastal sprayed Wednesday. Prevathon was the product used. I should cut in about 2 weeks. Then fertilize. The next full moon is on September 16 about mid way through my next coastal growing cycle. When should I spray again?
This is the first time I have fought the worms other than cutting and did know how treatment interrupts the life cycle- reinfestation.

BTW This board is a great resource and I appreciate the discussions.

Army Worm Cycle