The most common type of sod worms are the sod webworms. These are a common sighting in yards, golf courses, and in turfgrass areas. These worms are typically are gray or tan in colour when in the larvae stage. The larvae are caterpillars. These types of worms prefer fresh new grass to older grass that has been in place for years, but they can be found here. When a series of new lawns have been set these worms seem to multiply. As an adult the worms are gray and can range from half an inch to three quarters of an inch in length.

During the winter months these worms can be found partially grown larvae in their silky tunnels in the thatch and soil. The larvae activity usually starts around April and May. In mid- May to early June you can see these worms in their adult form. During the afternoon these worms scatter their eggs over the grass. They do this by flying in a zigzag pattern over the grass. Other parts of the day are spent hiding out in the shrubbery and the rest of the turf. During the night these worms come out to feed on the blades of grass and stems. An area of grass that has been infected by a webworm can be seen as a bare area that appears to be scalped. It can be seen from a distance as an irregular brown spot.

People often wonder how they can test for these webworms in the sod to make sure that the entire lawn has not been infected. You can use a homemade recipe by adding a quarter of a cup of laundry detergent to a gallon of water. The mixture is then applied to the damaged area around the outsides. It is pointless to add the mixture to the middle of the area as this grass is already dead and there won't be any worms there. Within ten minutes of applying the mixture if there are any worms in the area they will start coming to the surface. If the home remedy does not work then you might want to try a store bought product that contains chemicals that can kill the worms. One such produce is TalstarOne. This product has been designed for a number of different turf pests and is safe to use on your grass. However, before spraying on your grass you should make sure that it is safe to use if you have an uncommon type of grass.

In some areas, these worms are called lawn moths. While they may infest any type of grass they are typically found in bluegrass. Although they do not pose a problem in the winter they can be a serious problem during the summer months if they are given the chance to multiply and feed upon your grass.

These worms are widespread throughout the United States and are quickly becoming a problem for some areas in Canada. For example, in recent years the Edmonton, Alberta area has seen an increase in the number of worms that have been infected yards and garden throughout the city.