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In This Issue
Cotton – Charting New Waters
Increased Capacity Helps Texas Ginners
Cotton's Agenda: Don’t Miss Those Deadlines
Greenhouse Gas Debate Continues
Don’t Mess With West Texas...Varieties
Pigweed Hits North Alabama
Air Quality Rules Help Farmers
Ginning In The West Continues To Change
Calif. Ag Summit Focuses On Key Industry Issues
What Customers Want: Today’s Consumer Won’t Accept Poor Quality
Cotton Board: Enemy Becomes Friend
Missouri’s Parker Elected Chairman Of NCC For 2011
Editor's Note: Want Some Advice? Talk To A Farmer
Industry Comments
Web Poll: ‘Combo’ Approach For Weed Control
Specialists Speaking
Cotton Ginners Marketplace: Don’t Wait Too Long To Schedule Gin Repairs
Industry News
Cotton Consultants Corner: ‘Don’t Wait Too Late’
My Turn: A Fond Farewell
TCGA SECTION
TCGA Schedule of Events
President's Report
TCGA’s ‘Ginner of the Year’
Scholarship Awards Announced
Trust Continues Profitable Trend In 2010
Incoming TCGA President
Q&A with Jim Bradford
TCGA Exhibitors and Booth Numbers
CF / TCGA Alliance
Civic Center Map (PDF)
TCGA Staff
NFL Referee To Address PCG Annual Meeting
TCGA’s New Home: Overton Hotel
TCGA Officers/Directors
What To Do In Lubbock
Georgian To Lead National Cotton Ginners
ARCHIVES

Pigweed Hits North Alabama

Amanda Huber
Southeast Editor
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Resistant Palmer Amaranth Can Spread Rapidly In A Field

The days of being able to eliminate most all of the weed problems in their fields are over for Alabama producers, who had escaped the problems with glyphosate-resistant Palmer amaranth as found in their neighbor to the east.

Now begins a brand new era in weed management, and 2011 will be an important year in the battle against Palmer pigweed.

2011 A Critical Year

“We’ve been very lucky in Alabama as far as weed resistance,” says Charles Burmester, Extension agronomist with the Tennessee Valley Regional Research and Extension Center based in Belle Mina, Ala. “We haven’t had the major problems that a lot of other areas have had with Palmer amaranth.

“We have had some glyphosate-resistant horseweed, mainly in the northern part of Alabama, since early 2000, but we’ve been fortunate up to this point that we haven’t had that many problems,” Burmester says.

The agronomist says one reason they likely haven’t had problems before now is because Palmer amaranth just wasn’t a prominent weed species, especially in the northern part of the state where he is located.

“The first incident that was really confirmed was in the Barbour County area,” he says. “This year, we had 20 out of 63 counties that we have confirmed have resistant pigweed. That is a big jump in just one year.

“We’ve come a long way in one year as far as developing a problem across the state,” he adds. “We think that from all indicators, 2011 is going to be a very critical year for us, as far as Palmer pigweed.”

While the problems are still scattered and spotty in some fields, Burmester expects a great deal more pigweed this coming season and even the possibility of some fields that cannot be harvested.

Critical Management Points

Cotton Weed Control Program For Glyphosate-Resistant Palmer Amaranth

With that in mind, he and other Extension agents in Alabama have spent much of the winter holding meetings and workshops to spread the word about management of herbicide-resistant Palmer amaranth.

“We still have a long way to go as far as education goes in Alabama,” Burmester says.

Some of the critical points for managing glyphosate-resistant Palmer amaranth are to kill all weeds prior to planting, especially the resistant weeds, using products that give residual control past planting.

Producers should maintain residual control by using soil-active herbicides throughout the season. Escaped pigweed should be hand rogued from fields. Maintain post-harvest pigweed control, especially in early harvested crops like corn, by mowing followed by an application of 2,4-D or Gramoxone plus 2,4-D.

Lastly, rotate crops and use herbicides with different modes of action in each crop.

Contact Amanda Huber at (352) 486-7006 or ahuber@onegrower.com.

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