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Posted 20 September 2011. PMN Crop News.

RADIANT SC Insecticide Offers Vegetable Producers a Valuable Tool in Integrated Pest Management

Avoid the development of the resistance by using an effective IPM program

Source: Dow AgroScience Press Release.

Indianapolis, Indiana (September 8, 2011)--Practicing Integrated Pest Management (IPM) is becoming an increasingly fundamental element of vegetable production. An important piece in the IPM puzzle is selecting an effective insecticide to control costly pests. RADIANT® SC insecticide, the only Group 5 insecticide used in conventional vegetable crops, can provide the final piece of the puzzle.


Dr. Joseph Funderburk, a professor of entomology at the North Florida Research and Education Center, says IPM provides the foundation for controlling pest populations. He says that by not instituting an IPM program, growers risk the development of the three R’s: resistance, resurgence and replacement.

“Resistance can develop if growers abuse insecticides,” Funderburk says. “Producers can experience a resurgence of pests if they eliminate natural enemies with inappropriate applications of an insecticide. Finally, growers could see the replacement of one pest with other pests. It essentially comes down to whether or not growers are effectively controlling insects.”

The unique chemistry of RADIANT makes it an excellent addition to an IPM program. As a Group 5 insecticide, RADIANT can be used to reduce initial populations of many insects, including thrips, and then rotated with another class of chemistry for any necessary follow-up applications.

“RADIANT is a highly effective product,” Funderburk says. “It’s still the most effective chemistry in the marketplace for thrips, and we haven’t identified another product that can offer growers that level of control.”

Tony Weiss, field scientist for Dow AgroSciences, encourages producers to send samples to their county Extension service to determine the species of thrips. He says it’s impossible to distinguish between Western flower thrips (WFT) and Florida flower thrips (FFT) in the field.

“FFT rarely need to be sprayed because they don’t cause the kind of economic damage that WFT do,” Weiss says. “By correctly identifying the species, producers can potentially eliminate an insecticide application.”

Avoiding Resistance

RADIANT should be used in a rotation with other classes of chemistry to help ensure all products retain their effectiveness (see table). Growers should rotate between groups of products, not within.

“Insecticide Resistance Management (IRM) is a key component of an effective IPM approach,” Funderburk says. “Insecticide resistance is likely if growers put a lot of selection pressure on a particular pest population. It’s important to rotate insecticides with different modes of action to avoid the development of resistance.”

Funderburk notes that many of the new insecticides on the market, including RADIANT® SC insecticide, help maintain beneficial insects. He says the minute pirate bug is especially important in managing thrips. High populations of minute pirate bugs are capable of suppressing or controlling infestations of WFT without applications of an insecticide.

“Conservation of natural enemies is very important in IPM programs,” Funderburk says. “New insecticides like RADIANT are selective and conserve key natural enemies. RADIANT conserves beneficials like the minute pirate bug and offers control that no other product does.”

INTREPID® 2F insecticide, which contains the active ingredient methoxyfenozide, is an ideal rotational partner with RADIANT, particularly when controlling caterpillar pests. As a Group 18 insecticide, INTREPID 2F offers the different mode of action necessary to avoid resistance.

“INTREPID 2F is the perfect fit in an insecticide rotation with RADIANT,” Weiss says. “Not only is there no other material like it in the vegetable marketplace, but INTREPID 2F also is the premier worm control product.”

RADIANT was the recipient of the Presidential Green Chemistry Challenge Award in 2008 and was accepted for registration under the U.S. EPA Reduced Risk Pesticide Initiative. Growers should always read and follow label directions and consult the label before purchase to determine the class of insecticide.

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Jake LeRoy