is part of the Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

  • American Agriculturist
  • Beef Producer
  • Corn and Soybean Digest
  • Dakota Farmer
  • Delta Farm Press
  • Farm Futures
  • Farm Industry news
  • Indiana Prairie Farmer
  • Kansas Farmer
  • Michigan Farmer
  • Missouri Ruralist
  • Nebraska Farmer
  • Ohio Farmer
  • Prairie Farmer
  • Southeast Farm Press
  • Southwest Farm Press
  • The Farmer
  • Wallaces Farmer
  • Western Farm Press
  • Western Farmer Stockman
  • Wisconsin Agriculturist
Northeast Texas cotton
<p> Northeast Texas cotton</p>

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.

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.”

Hide comments

Comments

  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
Publish