Hulett Response to Coronavirus. Read Here

GET STARTED

Armyworms

Active Seasons

Illustration representing the spring season
Illustration representing the summer season
Illustration representing the winter season
Illustration representing the fall season

Appearance and Size Facts

  • Fall Armyworm caterpillar larvae have stripes running the length of their body
  • One stripe is present on each side and another stripe runs down the middle of the back
  • Hairless caterpillars having a base color ranging from yellow-green to a dark brown or gray color
  • Larvae will also have stripes, but have a yellow-white marking on the head
  • Have four dark circular spots on the upper side of each abdominal segment
  • Size: Range from 1/16 inch as the first instar larvae to 1 1/3 inches as the mature larvae

Behavior and Habitat of Armyworms

Fall Armyworms pass the winter as partially grown larvae in the soil or under debris in grassy areas. Activity and growth are continuous except during very cold weather. When fully grown, they stop feeding for four days and then pupate over a 15 to 20 day period. Adults emerge in May and June. Females feed for 7 to 10 days on honeydew, nectar, or decaying fruit before laying eggs. Eggs are laid at night in clusters of 25 to 134 on grass or small grain leaves. A single female may live as an adult for 17 days and produce up to 2,000 eggs. Fall Armyworms have a very broad host range, but show a distinct preference for grasses, especially those planted in the landscape.

Image of a magnifying glass

Signs of Infestation of Armyworms

Plant damage is nearly identical to the damage caused by Sod webworms. Larvae will begin to consume just one side (front or back) of the leaf blade, then as the feeding progresses, the entire leaf blade will be consumed. Larvae will also burrow into the growing point of the plants, destroying potential new growth of plants.

An illustration representing a warning sign for bug infestation

Tips for Prevention of Armyworms

Mow the turf to the acceptable recommended height for each cultivar or type of turfgrass, and then water it well to move the Armyworms out of the thatch layer. If this does not work, a professional pest management company, such as Hulett Environmental Services, should be consulted in order to manage the fall Armyworm infestation.

A cropped image of a pencil

Armyworm Gallery

Photograph of armyworm
Photograph of armyworm number 2
Photograph of armyworm number 3

Latest Pest & Termite Control News

When Do Termites Swarm? Are there Termites with Wings in South Florida?

When Do Termites Swarm? Are there Termites with Wings in South Florida?

Every spring and summer, termites emerge from their nests in huge numbers. This event is called swarming and signals that the reproductive members of termite colonies in the area are leaving to reproduce and start new colonies — maybe at your house if they can. These adult and winged termites...

Read More ›
What You Need to Know About Eastern Subterranean Termites

What You Need to Know About Eastern Subterranean Termites

Eastern subterranean termites, the termite species Reticulitermes flavipes, are trouble for any homeowner. They can cause extensive structural damage, and it’s difficult to spot them before they’ve caused significant destruction. Homeowners insurance policies usually don’t cover...

Read More ›
Termite Spotlight: Native Subterranean Termites

Termite Spotlight: Native Subterranean Termites

Native subterranean termites are destructive insects that can be difficult to detect. These bugs have a significant economic impact, causing billions of dollars in structural damage across the country annually. Subterranean termites are responsible for 95% of this damage nationwide. Homeowner's...

Read More ›