RESEARCH TRIANGLE PARK, N.C. (April 5, 2010) — Glyphosate-resistant weeds are becoming all too familiar for growers in the Corn Belt, as many are experiencing resistance from ragweeds, Palmer amaranth and the toughest of them all — waterhemp.
“Waterhemp seeds have a discontinuous emergence pattern and can germinate later in the season than most summer annual weed species,” according to an article posted on the University of Missouri (MU) Extension Web site. “This allows waterhemp to escape many pre-emergence herbicide applications and often allows this weed to flourish after postemergence applications of non-residual herbicides like glyphosate.”
To control this difficult weed species, MU Extension recommends growers rotate crops and use alternative herbicide treatments, such as Laudis® postemergence corn herbicide from Bayer CropScience.
Laudis provides powerful residual control of more than 65 grass and broadleaf weeds, including those that have become resistant to glyphosate-, ALS-, PPO- and dicamba-based herbicides. Additionally, the
herbicide, which was introduced in 2008, offers an effective crop safety feature that makes it safe for use on all corn types, including field corn, seed corn, sweet corn, white corn, popcorn and corn grown for silage.
“Laudis works in harmony with corn because it controls weeds without injuring the crop,” says Jeff Springsteen, Bayer CropScience marketing manager for selective corn and soybean herbicides. “Its residual weed control power coupled with this level of crop safety offers growers a combination not often seen in selective herbicides.”
According to a 2009 study conducted by the University of Michigan, Laudis demonstrated excellent residual control during last year’s growing season. A mid-post application of Laudis with atrazine, Methylated Seed Oil and UAN provided complete control of redroot pigweed, velvetleaf and lambsquarters, and helped the field yield more than 225 bu/A of corn.
One Wisconsin retailer experienced firsthand the powerful control Laudis delivers.
“We plant a 4-1 female-male configuration on our seed corn acres, and weeds usually sprout up after we destroy the male rows,” says Dale Gretebeck, production manager for Henry Farms LLC in Dane, Wis. “Now that we’ve used Laudis, we can walk down a male row like it’s a sidewalk. Our scouting service came out once a week to check our fields, and our scout said these were some of the cleanest fields he had seen.”
Laudis can be applied from VE up to V7 growth stages in sweet corn, or up to V8 in field corn or popcorn. Combining as little as 3 fl oz/A of Laudis with 0.5 lb AI/A of atrazine increases the herbicide’s speed of control, weed spectrum and control consistency.
“Laudis is also an excellent tankmix partner with Ignite® herbicide on LibertyLink® hybrids or with glyphosate on Roundup Ready® corn,” says Jim Bloomberg, Bayer CropScience product development manager for selective corn and soybean herbicides. “In fact, a tankmix of Laudis with
Ignite or glyphosate improves control of stressed or otherwise difficult-to-control weeds, such as waterhemp, pigweed, lambsquarters, velvetleaf, ragweeds and amaranths.”
Bayer CropScience recommends growers apply Laudis as a post treatment in any sequential program. For optimum season-long weed control, growers should apply a labeled rate of Balance® Flexx herbicide at 3 fl oz/A followed by Laudis at 3 fl oz/A.
For more information about Laudis, growers can log on to www.LaudisHerbicide.com, contact their local Bayer CropScience representative or call 1-866-99-BAYER (1-866-992-2937).