Management strategies help control resistant weeds

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

Herbicide-resistant weeds are becoming more of a problem, forcing growers to alter their weed-control programs. DuPont Pioneer agronomists say management decisions, such as improved herbicide choices, clean seedbeds and careful planning for harvest, can help decrease resistant weeds.

“Growers should attack problem weeds with multiple modes of action and multiple tactics,” says Mark Jeschke, DuPont Pioneer agronomy research manager. “This will control more weeds and preserve effective herbicide technologies longer, giving growers more options.”

A two-pass system of pre-emergence and post-emergence herbicides is another successful strategy for growers and is particularly effective for controlling broadleaf weeds that emerge early and grow rapidly. Split application is another emergence tactic, which boosts control and provides better residual activity to help combat late-season weeds.

Starting with a clean seedbed in the spring is also vital for reducing resistant weeds. While fall herbicide application can help control winter annuals, the value for summer annuals that emerge five or six months after treatment is questionable. A spring pre-emergence herbicide program can help further reduce resistance with a burn-down on the field.

“When using a pre-emergence program, growers should use the full rates recommended for these weeds,” Jeschke says. “A good, broad-spectrum burn-down will clear vegetation and provide good residual activity to ensure weed control through planting.”

Another approach growers can take to tackle weed resistance is by planning post-emergence applications earlier than previous years. Doing so attacks dominant weeds when they are three to five inches tall, an ideal growth stage, resulting in longer weed control.

Finally, before harvest, it’s important both to assess the weed population of each field and to harvest heavily colonized fields last. This two-fold tactic avoids further distribution of weed seeds, which helps reduce the spread of resistant populations. Growers planning for the coming season can consult their Pioneer agronomist or sales professional about developing a management strategy for herbicide-resistant weeds.


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


Convyers

Meridian’s conveyors deliver seed with unmatched versatility. Meridian’s transport conveyors are manufactured with heavy-duty, fully enclosed construction. Meridian’s cross cleated ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form