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Armyworms Infestation Up-Date

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Posted on: Aug 12, 2021Luis M Pérez

We have been monitoring the armyworm infestation. They are currently more noticeable in the state of Texas, however, now they are appearing in Illinois and Indiana. Dr. Green Lawncare president Ryan Van Haastrectht predicted that we might have an Armyworm infestation earlier this spring. We have had a mild winter and a wet spring, and we did not think it would be as bad as it has been. It is not the season for Armyworms infestation yet, but we have seen heavy outbreaks across the Dallas Forth Worth area. Typically, the worst outbreaks happen in late August to mid-September. It is predicted that the situation will get worse!

Armyworm Infestation in Different Areas

UPDATE 9/1/2021

Armyworms have been spotted further north this year as the warmer weather has allowed the moth that carries armyworm larve to reach Illinois and Indiana. More news to follow

Update 8/12/2021

James Tatum, Director of Operations, Horticulturist reported very heavy infestation in Burleson and South Fort Worth. Our technicians have also seen heavy Armyworm Infestation in Keller, North Fort Worth, Grapevine, North Richland Hills, Flower Mound, Lewisville, Denton, Arlington, and Mansfield. They have reported medium Infestation in Frisco, Allen, Mckinney, and Prosper. Also, light infestations have been reported in Plano and Dallas

Armyworm Infestation..Fall armyworms chewing on lawn blade
Fall Armyworms feeding on a grass blade

The best way to avoid extensive damage to your lawn from an Armyworm Infestation is to be proactive. Many insect and disease problems appear slowly and develop over time. However, Armyworms infestations are sudden and they develop very fast. Remember that Armyworms typically invade lawns closer to September. Therefore, if you have not seen any yet, you still need to look out for them.

Fall Armyworms Infestation Guide

Adult Armyworms are a common pest found in Bermuda grass, Ryegrass, St Augustine, and Zoysia grass. The name “Armyworms” is because they travel in groups and move through very fast. Armyworms are hard to spot in the beginning. They are small at first (about 1/8 inch). As a result, if you are not cautious, a large infestation can occur before you notice. The larvae feed for 2-3 weeks, and when fully grown, they are 1 to 2 inches long. Armyworms move quickly and reproduce in large numbers. The females can lay over 2,000 eggs. Armyworms typically lay their eggs are at the base of host plants. Adult Armyworms though, prefer to lay eggs on lush plants and grasses.

This is why early detection and treatment are essential to control the infestation of the fall armyworms. The most severe cases happen when armyworms attack during hot, dry weather. Therefore, it is crucial to watch for moths and damage when it is hot. In most cases, people find Armyworms, it is too late. However, you are not alone and we are here to help you! If you have any questions or concerns, please do not hesitate to reach out.

Want To Learn More Or Have Questions?

For more information on Armyworms, please contact our Lawn Care Expert, Luis Perez, via email at