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Late crops could be an invitation for loopers and worms

Late growing cotton and soybeans could lead to infestations of loopers and worms. Farmers should be prepared to use Intrepid Edge.

June 1, 2024

3 Min Read
Stay Ahead of Loopers and Worms
Submitted by Corteva Agriscience

Rains kept many farmers out of their fields and planters idle across row crop regions this spring, so playing catch up is just one challenge they could be facing as the 2024 production season moves into June.

While all growing regions may not have been impacted by rains and cooler temperatures, many planters were later than normal getting cotton and soybeans into the ground. Much-needed heat units to bring those crops back in line with traditional crop progress expectations were limited by weather fronts sweeping down from the north and stalling production efforts and subsequent germination when planters finally moved.


"Wet weather certainly pulled back the reins on the early progress of cotton and soybean production in many of the areas,” says Hunter Bowman, market development specialist, Corteva Agriscience. "Because those farmers are trying to catch up, I suspect a number of seasonal moth flights moving north will keep scouts and consultants busy evaluating when to pull the trigger on applications to protect vulnerable cotton and soybeans as the year progresses."

If looper pressure escalates in cotton and worms begin looking for susceptible soybean leaves, growers will need a product that can be used for reliable control of yield-robbing insects across both crops, and that product should be Intrepid Edge® insecticide. With two modes of action, it controls the toughest pests in a broad range of crops, including corn, cotton and soybeans.

As resistance to pyrethroids continues, slips from transgenic varieties are occurring more frequently. Farmers leaned on pyrethroids, so resistance was likely and somewhat inevitable.

"Pyrethroids provide limited residual activity. If you make an application of pyrethroids on Monday, you will most likely need to check that field by the end of the week and consider a second application," Bowman says. “I always remind farmers that Intrepid Edge insecticide provides excellent residual protection for 10 days or more. It will buy you some time and provide extended control of targeted insects that can rob your crop's yield potential."


Loopers hide down in the plant canopy which requires aggressiveness with the sweep net to get accurate counts. Loopers target plants when they are flowering. Because many of the soybeans being grown are indeterminate varieties, which flower from the bottom up until the end of the summer, looper damage is possible throughout the growing season. Excessive leaf defoliation from loopers can impact yield by reducing photosynthesis - which is critical for development of mature plant fruit.

"Based on the progression of cotton and soybeans that may be later than normal, moth flights could move in starting around the R1 or R2 stage and slow pod development and/or pod fill. Intrepid Edge insecticide is the gold standard for control of loopers and worms. I'll advise farmers to have it ready to go when economic threshold levels are met," Bowman concludes.


See how Intrepid Edge insecticide can help protect multiple row crops and your bottom line by visiting or by contacting your local Corteva Agriscience representative.

™ ® Trademarks of Corteva Agriscience and its affiliated companies. Intrepid Edge® is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Jemvelva™ is a registered active ingredient. Always read and follow label directions.  ©2024 Corteva.  021093  BR (4/29)  CAAG4INTE052 

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