Controlling Sod Webworms: Keeping Your Lawn Green and Healthy

Oleh Jamie Padberg March 07, 2023 Post a Comment

If you're a homeowner or someone who takes pride in having a well-manicured lawn, then you know how frustrating it can be to see your grass being destroyed by pests. One of the most common culprits is sod webworms - small, tan-colored caterpillars that feed on the blades of your grass. Not only do they leave unsightly brown patches in your lawn, but they can also attract other pests, such as birds and rodents, who feed on the worms. Luckily, there are steps you can take to control these pests and keep your lawn healthy and green.

What are Sod Webworms?

Sod webworms are the larval stage of a type of moth known as the lawn moth. They are typically found in warm, humid climates and can cause severe damage to your lawn if left unchecked. The worms themselves are small, measuring about 1/2 inch in length, and are usually tan or brown in color. They feed on the blades of your grass, leaving behind notches and chewed areas that can quickly turn brown and die.

Identifying Sod Webworm Damage

The first step in controlling sod webworms is identifying the damage they cause. Look for brown areas on your lawn that appear to be thinning out or have shorter blades than the surrounding grass. You may also notice small, white moths fluttering around your lawn in the early evening - these are the adult form of the sod webworm. If you suspect that you have a sod webworm infestation, you can do a "tug test" to confirm. Simply grasp a handful of grass and tug gently - if the blades pull up easily, you may have an infestation.

Preventing Sod Webworm Infestations

The best way to control sod webworms is to prevent them from becoming a problem in the first place. Here are some tips for preventing infestations:

Mow your lawn regularly and keep it at the recommended height for your type of grass. This will help keep it healthy and less susceptible to pests.
Water your lawn deeply and infrequently, rather than frequent shallow watering. This will encourage deeper root growth and make your lawn less attractive to pests.
Aerate your soil once a year to improve drainage and reduce thatch buildup, which can harbor pests.
Use a lawn fertilizer that is appropriate for your type of grass and apply it according to the manufacturer's instructions. A healthy lawn is less likely to be damaged by pests.

Controlling Sod Webworms

If you already have a sod webworm infestation, don't panic - there are several steps you can take to get rid of them:

Handpicking: If the infestation is small, you may be able to simply pick off the worms by hand and dispose of them.
Bacillus thuringiensis (BT): BT is a natural bacterial insecticide that targets the larvae of certain insects, including sod webworms. It can be applied to your lawn as a liquid spray or dust and is safe for pets and humans.
Insecticide: If the infestation is severe, you may need to use an insecticide to control the worms. Look for products that are specifically labeled for sod webworm control and follow the manufacturer's instructions carefully.
Nematodes: Nematodes are microscopic worms that prey on the larvae of many insect pests, including sod webworms. They can be purchased online or at garden centers and applied to your lawn as a liquid.

Sod webworms can be a frustrating pest to deal with, but with the right preventative measures and control methods, you can keep your lawn healthy and green. Remember to mow and water your lawn properly, fertilize it regularly, and be vigilant in looking for signs of infestation. If you do discover sod webworms in your lawn, try handpicking them first, or consider using natural control methods like BT or nematodes before resorting to chemical insecticides. With a little effort and care, you can enjoy a beautiful, pest-free lawn all season long.