Corn rootworm is an expensive pest to corn farmers. These insects have been known to cause up to $1 billion annually in potential yield loss and control costs. Once damage has been done, there is no known remedy to the potential yield loss. Here are three things to consider when scouting this season for corn rootworm.

1. Scout below the ground

Corn rootworm larvae live underground and feed on corn roots, making it difficult to assess the potential damage. One way to evaluate this damage is by performing a root dig. This method of scouting will allow you to make a visual inspection of possible root node damage from corn rootworm larvae.

2. Check for corn rootworm in soybeans too

Preston Schrader, Bayer technology development rep, is seen here placing sticky traps in a soybean field.

The western corn rootworm variant has been known to lay its eggs in soybean fields. Additionally, volunteer corn in soybean fields can serve as an attractive and effective host for corn rootworm if left unmanaged. This puts next season’s corn planted in the same field at risk for potential rootworm damage, making it important to scout for corn rootworm in soybean fields. To learn more information on how to effectively use sticky traps to determine potential corn rootworm risk, click here.

3. What you learn in #scout21 will help you in #plant22

Corn rootworm larvae will pupate in the soil and emerge as adult corn rootworm beetles, typically in July and August. Getting a corn rootworm beetle count through the use of sticky traps this time of year will help determine your management practices next year.


If corn rootworm pressure has been found in your fields, consider planting corn with SmartStax® technology. With two built-in modes of action for corn rootworm, it helps provide maximum control of corn rootworm and provides assurance that your crop and yield potential are protected all season long.