Food Plots Army worms in middle TN?

[Livin2hunt]

Yall have all got me worried. Just now got my plots up and growing finally.

 

[Livin2hunt]

At what point do we not have to worry about them?

They can stick around til the real first killing frost unfortunately.

 

[Popcorn]

Is there a temperature threshold for them? I guess not since they are actually flying in from the south? Even if it gets cold here a few nights that won't stop the possibility of more showing up I guess?

Not aware of a specific temperature but also not aware of any attacks after a good frost.
Anyone else ?