Tips for controlling fall armyworms and fire ants in your lawn – Standard-Times

Allison Watkins| Special to the San Angelo Standard-Times

Caterpillars of all kinds have been out in abundance this year, starting with early populations of webworms, other leaf-eating caterpillars like sophora worm (feeding on Texas Mountain Laurel) and walnut caterpillars (feeding on pecans). The major nuisance right now is the fall armyworm. They have emerged early and strong, which is unfortunate for some home lawns and pastureland.

Armyworm outbreaks are usually short-lived, but memorable when they happen. They are generally kept under control by insect and animal predators, weather conditions and other factors. But when the conditions are just right, they can devour a lawn quickly.

Watch out for armyworms in the lawn, and apply an insecticide as soon as possible if they appear in large numbers or significant plant damage is observed. Insecticides with low toxicity and limited impact to beneficial insects include Bt, spinosad and halofenozide. Conventional pesticide options include bifenthrin, carbaryl, permethrin and esfenvalerate. Apply in the early morning or late evening for best results. For more info on armyworm control, visit https://tomgreen.agrilife.org/horticulture.

Fire ants are also out in high quantity, which is normal this time of year. Not only are fire ants painful to people when we accidentally come across them in the yard, they can also find their way into the home or electrical equipment, and can even damage plants such as turfgrass and vegetable gardens.

The Texas Two-Step method recommended by Texas A&M includes both mound treatments and baits. Visit https://fireant.tamu.edu/controlmethods/twostep/ for details. An insect growth regulator such as methoprene (trade name Extinguish) is a good way to control fire ants without damaging other insects, but there are many effective product options to choose from. More important than which particular product to useis proper application. Apply a bait formulation lightly and evenly through the entire landscape. Then use a contact/mound treatment formulation directly on visible mounds.

It seems like summer has just begun, but fall will be here before you know it, and we have many upcoming events to offer home gardeners in the Concho Valley. Join us on Friday, July 30,for a workshop on peaches planting, growing, canning and preserving. The program will be held at the Tom Green 4-H Center from 1 p.m.-5 p.m. and costs $30 to attend. Pre-registration required. For info and to sign up, visit https://tomgreen.agrilife.org/ or call the Extension Office at 325-659-6522.

Other upcoming events include the Fall Landscaping Symposium hosted by the Concho Valley Master Gardeners (see txmg.org/conchovalley to register), an Earth-Kind Landscape School series from Sept.15 to Oct. 13, and a first-ever Fall Vegetable Plant Sale held by the Master Gardeners on Sept.25. For updates and info on all educational opportunities, sign up for the monthly horticulture e-newsletter by calling the Extension Office at 325-659-6522 or visiting https://tomgreen.agrilife.org/horticulture.

Allison Watkins is the Texas A&M AgriLife Extension Agent for horticulture in Tom Green County. Contact her at aewatkins@ag.tamu.edu.

Read more:
Tips for controlling fall armyworms and fire ants in your lawn - Standard-Times