Missed the Palmer amaranth webinar? Recording is in YouTube

On Wednesday, February 15, Muthu Bagavathiannan, specialist in weed ecology and agronomy, presented a new tool for consultants, extension specialists and agents, and growers to assist with management decisions regarding Palmer amaranth, named PAM. Based in Microsoft Excel, the tool allows the user to input their rotation schedule, chosen varieties and other management practices. From those entries, the tool calculates the amount of weed seed present over a 10-year period, as well as the economic gains or losses during that period. In addition, it calculates the risk of the combination of practices and allows the user to compare up to 6 different management scenarios. The tool calculates risk based on the amount of weed seed present, which has been concluded to be the main reason for pigweed-related crop failures. 

You can get to the tool from this link.

If you would like to see Dr. Bagavathiannan’s presentation, follow this link to the YouTube recording. During the 60-minute video, he demonstrates how to use the tool and how to interpret the results.

Tomorrow at 3 PM ET: Learn about a pigweed decision management tool

Herbicide resistance in Palmer amaranth (known as Palmer pigweed) is a serious issue in the Southern US and is spreading to several other states. Repeated use of a few herbicide mechanisms of action (MOA) without sufficient management diversity is the common cause of this resistance. A proactive resistance management strategy that integrates diverse chemical and non-chemical tools will help prevent/manage resistance and preserve the utility of available herbicide options.

This webinar provides a general overview and demonstration of a new Microsoft-Excel based decision support tool that guides informed decision making for effective management of this weed, with particular focus on soil seedbank management and profitability. Users can build their own management programs and see for themselves how effective their pigweed management program is, as well as overall economic outcomes associated with their options. This tool also predicts the likely risk of resistance for the management program built by the user.

Date and time: Wednesday, February 15, at 3 PM Eastern time Continue reading

New technology must be used with good stewardship

In Southwest Farm Press

The old saw, “Those who do not learn history are doomed to repeat it,” attributed to George Santayana, should be made into a bumper sticker and slapped onto the side of every spray rig in the cotton belt as a constant reminder that overuse of new chemistry will shorten its useful life.

Overuse of Roundup Ready technology resulted in what Todd Baughman, Oklahoma State University Extension agronomist, refers to as Public enemy No. 1: herbicide-resistant pigweed. Continue reading

Webinar: PAM: a bioeconomic decision-support tool for guiding the management of Palmer amaranth

Herbicide resistance in Palmer amaranth (known as Palmer pigweed) is a serious issue in the Southern US and is spreading to several other states. Repeated use of a few herbicide mechanisms of action (MOA) without sufficient management diversity is the common cause of this resistance. A proactive resistance management strategy that integrates diverse chemical and non-chemical tools will help prevent/manage resistance and preserve the utility of available herbicide options.

This webinar provides a general overview and demonstration of a new Microsoft-Excel based decision support tool that guides informed decision making for effective management of this weed, with particular focus on soil seedbank management and profitability. Users can build their own management programs and see for themselves how effective their pigweed management program is, as well as overall economic outcomes associated with their options. This tool also predicts the likely risk of resistance for the management program built by the user. Continue reading

Pigposium III to be held February 28

In Delta Farm Press

The first Pigposium was held in 2010, after one of the worst pigweed years growers have experienced.

“Glyphosate resistance had become an issue for everyone it seemed and growers were desperate for solutions,” says Tom Barber, University of Arkansas weed scientist. “That meeting drew around 800 attendees and as far as I know still holds the unofficial record for the most highly attended meeting conducted by the University of Arkansas Cooperative Extension Service, at least in recent years.” Continue reading

Missouri research study finds waterfowl transports pigweed seeds

In Delta Farm Press

by David Bennett

It’s that time of year when the migration of waterfowl has begun and hunters unlock the gun cabinet and pull on camo. It turns out those wonderful ducks may be carrying more than the odd band and a desire for warmer climes.

Is the rapid spread of herbicide-resistant pigweeds in the Mid-South at least partially attributable to the flyway? A recent study out of Missouri says it is quite likely. Continue reading

Weed seeds may be included in some pollinator mixes

Reposted from The Connection, North Central IPM Center

by Diana Yates

Weed scientists in at least two Midwestern states have been reporting for years that a conservation program meant to provide habitat for pollinating insects is sowing bad seeds – including seeds of the potentially devastating agricultural weed Palmer amaranth – along with the good. Now, researchers at the University of Illinois have traced the weed seeds to at least one source: pollinator habitat seed sold by a company in the Midwest.

A tag on the seed mix claims it is 100 percent weed-free. The provider of the seed, whom the researchers declined to name, is one of dozens of companies that sells seed mixes used in the U.S. Department of Agriculture Pollinator Habitat Initiative and Conservation Reserve Program. Continue reading