This product is not labeled for army worms so we would not recommend. Bifen XTS is labeled for army worms. Be sure to read the product label for complete application instructions.
Prevention applications of Nufarm Mallet 0.5 G Insecticide are typically applied in May in your area. For more information on grub control, check out our article here and an article from the extension office in your state regarding treatment of this pest here.