Farm Progress

Topguard is proving effective against cotton root rot

Section 18 for Topguard fungicide is extended into 2013.Rainfall soon after planting is a factor in phytotoxicity.

Ron Smith 1, Senior Content Director

December 12, 2012

1 Min Read
<p> Northeast Texas cotton</p>

Tom Isakeit, AgriLife Extension plant pathologist, continues to “fine-tune” a product that has proven effective against one of the most stubborn of cotton diseases, root rot.

Topguard fungicide received a Section 18 emergency exemption for use in Texas cotton in 2012. That exemption has been extended into 2013 with hopes a full label soon will be issued.

The current application method is with a T-band at planting. “We’re evaluating in-furrow application and assessing phytotoxicity,” he says. Rainfall soon after planting is a factor in phytotoxicity.

Adequate moisture shortly after planting is also important for product efficacy, Isakeit says, with three-fourths inch of water needed within three to five days after planting. “If there is no rain, we get no benefit — but we also see little disease.”

Test results from 2012 plots were largely indeterminate because of drought, he says. Disease presence was inconsequential in many research plots. He notes, however, that areas where nozzles were clogged and limited fungicide applications “showed how well the product works.

“We are pushing for proper IPM strategy with the product to maintain efficacy. We need to rotate; a monoculture also leads to other problems, such as nematode infestations.”

About the Author(s)

Ron Smith 1

Senior Content Director, Farm Press/Farm Progress

Ron Smith has spent more than 40 years covering Sunbelt agriculture. Ron began his career in agricultural journalism as an Experiment Station and Extension editor at Clemson University, where he earned a Masters Degree in English in 1975. He served as associate editor for Southeast Farm Press from 1978 through 1989. In 1990, Smith helped launch Southern Turf Management Magazine and served as editor. He also helped launch two other regional Turf and Landscape publications and launched and edited Florida Grove and Vegetable Management for the Farm Press Group. Within two years of launch, the turf magazines were well-respected, award-winning publications. Ron has received numerous awards for writing and photography in both agriculture and landscape journalism. He is past president of The Turf and Ornamental Communicators Association and was chosen as the first media representative to the University of Georgia College of Agriculture Advisory Board. He was named Communicator of the Year for the Metropolitan Atlanta Agricultural Communicators Association. More recently, he was awarded the Norman Borlaug Lifetime Achievement Award by the Texas Plant Protection Association. Smith also worked in public relations, specializing in media relations for agricultural companies. Ron lives with his wife Pat in Johnson City, Tenn. They have two grown children, Stacey and Nick, and three grandsons, Aaron, Hunter and Walker.

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