Purdue specialists issue guide on invasive weeds

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article

Two Purdue Extension specialists have developed an information guide to help crop producers across Indiana deal with Palmer amaranth, an aggressive, herbicide-resistant weed.

Weed scientists Bill Johnson and Travis Legleiter released a new publication, Palmer Amaranth Biology, Identification and Management in Indiana, to help farmers control the weed's spread.

"Our publication gives producers a broad view of the weed, and it gives them a starting point to build a preventative program," Legleiter said. "We're letting producers know that if they do encounter the weed, they need to have a proactive plan."

The publication can be found online here.

Most populations of Palmer amaranth are resistant to glyphosate, making it very hard to control. The weed has infested cotton and soybean farms in the southern United States in recent years, causing economic hardships for farmers.

Johnson said Palmer amaranth populations were confirmed in the Evansville area in 2011 and in five counties in northwestern Indiana last fall. It is suspected that seeds were present in manure spread over fields that contained cottonseed hulls from the South.

"This weed is arguably the biggest weed problem to hit agronomic crops in the last 10 years," he said. "Very severe yield losses are possible."

Palmer amaranth is a hairless, flowering weed with multiple seed heads. The fast-growing green weed has one female terminal head that can produce 500,000 seeds.
According to Legleiter, the weed can grow 2 inches a day and up to 10 feet tall.

"It can add to the seed bank very aggressively, and the seeds will survive for several years," he said.
Legleiter recommended that farmers develop a plan to control Palmer amaranth and to scout fields for the weed during their growing seasons.

"If you let one or two plants get by in one year, in a couple years you'll have a pretty big issue," he said.
Palmer amaranth was misidentified as waterhemp in Indiana, and Legleiter said that led to mismanagement. Unlike waterhemp, the Palmer amaranth petiole, or the stalk that joins the leaf and main stem, will be as long or longer than the leaf itself.

In their publication, Johnson and Legleiter cover cultural management options, such as crop rotation, tillage and hand weeding.

"If you do have a few escapes of the weed that are manageable to pull by hand, do it," Legleiter said. "It's going to save you in the long run."

The publication also includes tips and tables on using specific herbicides for pre- and post-emergence control.
Johnson said Palmer Amaranth damage likely will be much more severe for soybean fields than corn fields because there are fewer herbicide options for soybeans.
In addition to being available online, the publication will be handed out this winter during herbicide-resistant weed meetings around the state.

Details on the meetings are:

* Jasper County: Jan. 24, Rensselaer. Contact Bryan Overstreet at 219-866-5741 for more information.

* Tippecanoe County: Feb. 21, West Lafayette. Contact Jeff Phillips at 765-474-0793 for more information.

* Jackson County: Feb. 28, Seymour. Contact Richard Beckort at 812-358-6101 for more information.

A meeting brochure is available at https://ag.purdue.edu/btny/weedscience/Documents/resistance.pdf


Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


X-TENDED REACH GRAIN CARTS

YOUR BEST HARVEST IS NOW WITHIN REACH J&M introduces their patented line of X-tended Reach grain carts, featuring a frontfolding single ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form