My fescue lawn disappeared in 4 days due to army worms. What can I do

"Insecticides can be applied successfully in the very early stages of an invasion, and before the army worms reach one-half inch in length. Once they grow, however, they become resistant to chemical applications. Treatments are applied at dusk before the army worms emerge to begin feeding." That's for next time, I think the whole massacre ends after 2 weeks and then you need to plant again. http://www.allaboutworms.com/army-worms

They most likely are grub. treatments should be done in June before the battles emerge and again in august

Here's some good advice.... http://www.wikihow.com/Control-Armyworms

I'm so sorry! They offered advice about preventive measures you can take if those army worms come back!

We have been watering 2X a day and will do so for a week per instructions from the lawn people. I can see green fuzz starting in the bare spots. We will continue to water so the grass will have a good root system. Thanks for the help.

Castor oil