Use a Single Active Ingredient to Manage Resistance

Using pest-control products with single active ingredients supports resistance management.
Single active ingredient products help support resistance management in fruiting vegetables.

Developing a sound pest-control program for your fruiting vegetables requires careful planning for effective resistance management. Using products with single active ingredients provide more flexibility throughout the season.

“It’s often a waste to use multiple modes of action in one application,” says Shine Taylor, DuPont Crop Protection field development representative in Florida. “To maximize the value of using different chemistries throughout the growing season, employ a single active ingredient and one mode of action at a time.”

Plan the Best Product Rotation

The international Insecticide Resistance Action Committee (IRAC) classifies insecticides into group numbers by active ingredient mode of action to help growers plan the best product rotation to avoid resistance development. IRAC also publishes a convenient mode-of-action classification information that can help you plan pest management strategies.

On tomato crops, for example, growers can use a neonicotinoid insecticide (IRAC Group 4) within the first one to three weeks, Taylor says. During weeks three to five, and again between weeks five to seven, using DuPont™ Coragen® insect control powered by Rynaxypyr® (IRAC Group 28), applied via drip chemigation or foliar, will deliver effective control of both vegetable and serpentine leafminers (larvae), which are becoming a big problem in some areas, he adds. “Coragen® also offers suppression of silverleaf whitefly nymphs.”

In weeks seven to nine, switching to a IRAC Group 22 product, such as DuPont™ Avaunt® insecticide, incorporates another mode of action and delivers broad-spectrum control of worms, including beet and southern armyworm, and tomato pinworm, says Taylor.

Control Worms

Coragen® offers the unique benefit of controlling worms when applied through drip chemigation, he notes. “That provides greater application flexibility throughout the season.

“Coragen has a favorable environmental profile and is classified as a reduced-risk product on tomatoes,” he says. “It has the shortest re-entry period – just four hours – and a preharvest interval of just one day for most vegetable crops.”

The information provided on this website is for reference only. Always refer to the product labels for complete details and directions for use.