Sob webworms lawn damae

Sod Web Worms

Why Should You Eliminate Sod Web Worms from Your Turf?

Sob webworms will attack turfgrasses in Tennessee in spring and early summer. You will notice dead patches of grass throughout your lawn. The damage becomes more severe by midsummer when large sections of the lawn are ruined by the caterpillars. In drought conditions, the damage is worse as the turf is less able to recover from caterpillar feeding. By July and August, when temperatures are highest and cool season grasses are not growing vigorously is when your turf suffers the most. Affected areas recover slowly from webworm feeding, and often are occupied by weeds. If your lawn falls victim to this destructive insect, here is what you can do.

Sod Web Worm Management

controlling sod webwormsInsecticides

The caterpillars are around 1/4-inch in size. Apply the insecticide of your choice late in the day as possible because these nasty insects are nocturnal. Avoid mowing the area for one or two days after the application.

Biological Methods

There are products that contain Bacillus Thuringiensis Var. Kurstaki, a bacterium which produces a toxin and paralyzes the gut of the caterpillar. This will happen shortly after exposure, so feeding activity slows soon after application.

Another control method is to apply products formulated with Steinernema carpocapsae. This entomopathogenic nematode will seek out caterpillars and penetrate the creature. Once inside the host, it introduces a bacterium which causes a massive infection in the host caterpillar. The nematode then reproduces inside the insect cadaver and moves on in search of new victims, reducing caterpillar populations significantly.

Biological control agent will be only effective if handled properly and applied with adequate water and irrigation.

Should you have an infestation problem, contact Secure Lawn, our experts in grass and pest management will help you control sod webworms, aphids, invasive weeds, among others.



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SecureLawn is a locally owned lawn care business dedicated to providing residents of Middle Tennessee and Kentucky with the highest quality products and services available. Our comprehensive selection of offerings includes residential and commercial lawn care, tree & shrub care as well as pest protection. We guarantee fair prices along with stellar service every time, and no contracts are required for our friendly technicians to use top-notch products and create a safe outdoor experience for you and your family. To make things easier, online payment options, discounts, and pay-as-you-go programs are all available. So why not get started now?

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