Key Issues Perspective

Mode of action and site of action education

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

Mode of action has been talked about for some time in relation to preventing herbicide resistance by weeds, but now site of action is also being stressed by the crop protection industry.

“We want the use of herbicide programs with multiple modes of action, and we also want to make sure that we hit multiple sites of action in the plant, too,” said John Rice, Bayer CropScience technical sales consultant (TSC) in Illinois.

The spread of herbicide-resistant weeds has made selection of herbicide programs more complicated than ever before, and most growers can benefit from assistance in developing a program.

Sam Knott, Crop Production Services (CPS) marketing and sales manager, who also serves as area agronomist for 18 counties in Illinois, said, “A big part of our assistance to farmers involves identifying the problem and finding different ways to resolve it.”

Knott said that growers have to start with clean fields from clean tillage or a herbicide application. After that is control of summer annual weeds with the hot concerns today being waterhemp and Palmer amaranth, both of which are spreading throughout Illinois, he said.

The crop protection industry agrees that a preemergence residual herbicide needs to be applied, and Knott preaches the use of at least two modes of action and prefers three different modes of action for a herbicide combination.

“There are very few products that come ready to use with three modes of action. Agronomists have to use their agronomic knowledge to come up with that third mode of action in many cases, especially to have different sites of action, too,” Knott said.

Follow-up has to be a postemerge herbicide, and mode of action again has to be a consideration. “It is an eye-opener for most farmers when they realize that a soil-applied herbicide can have the same mode of action as a post herbicide,” Knott noted. “One of the fastest ways to develop weed resistance is to use the same mode of action on the same weed species continuously. That is something I spend a lot of time in talking about with agronomists and growers so that there is use of herbicides with both different modes of action and sites of action.”

“Respect the Rotation” is a weed management and stewardship program by Bayer CropScience, which helps representatives educate ag retailers, crop consultants and growers about preventing herbicide resistance and dealing with resistance if it occurs. Mode of action and site of action is a main topic. Respect the Rotation “showcase events,” one-on-one discussions and themed meetings with retailer customers, are one aspect of this program, Rice noted.

Most ag retailer agronomists and crop consultants should have a copy of herbicides listed by mode of action and site of action, Rice said. Having a pdf in a computer or tablet “is a quick, simple way to have that information at their fingertips.”

What’s extremely important in any discussion about dealing with weeds is knowing what ones are a problem in a field. Knott said, “You have to do a thorough job of scouting because if you have a weed like waterhemp or Palmer amaranth, it can grow as much as two to three inches in a 24-hour window.”

Scouting after the herbicide application will provide evidence of problems if weeds are surviving in the field. Rice said confirmation of resistant weeds can be accomplished through local Extension offices, state weed specialists or the local Bayer CropScience rep having weed seed tested.

Rice said, “Our long-term goal is to make sure our customers understand why we have resistance today, how to manage the issues and prevent having problems down the road.”


Prev 1 2 Next All



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


Market Info

Crops

Livestock

Energy

Metals

Indices

Demco 1400 Grain Cart

Demco offers a 1400 bushel grain cart to provide unmatched efficiency and operator convenience. In addition to the large 1400 ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form