The Kay County OSU Extension Office Gives Advice for Treating Army Worms
Mike Seals - August 17, 2021 12:59 pm
Besides warm-season turfgrasses, plants attacked by armyworms include grain and forage sorghum, corn, small grains, sweet potato, beans, turnip, clover, tobacco, spinach, cucumber, potatoes, tomatoes, cowpeas, cabbage, bluegrass, and others.
Damage consists of foliage consumption. The small larvae will chew the green layer from the leaves and leave a clearing or “windowpane” effect. The first three instars do very little feeding while the last two instars consume 85% of the total foliage consumed. Armyworms feed any time of the day or night, but are most active early in the morning or late in the evening.
According to the Kay County OSU Extension office, the following insecticides are very selective and only kill true caterpillars and won’t even kill inchworms who aren’t true caterpillars, and should be available at most stores that sell home and garden products.
- Bacillus thurengesis (Bt)