Herbicides

To date, several dozen states have the green light from the Environmental Protection Agency (EPA) for use of the new dicamba formulations, BASF Engenia and Monsanto XtendiMax with VaporGrip Technology. Monsanto has also licensed its product to DuPont, which is marketing it as FeXapan with VaporGrip.

Differentiate fact and fiction as you plan your weed control strategy.

The bad news? Marestail is a problematic weed lurking in many fields. The good news? There are several control options, according to Kansas State University Extension specialists Dallas Peterson and Doug Shoup.

The Environmental Protection Agency (EPA) recently expanded Dow AgroSciences’ Enlist Duo herbicide geography from 15 to 34 states.

You or your neighbors could be unknowingly planting Palmer amaranth anywhere Conservation Reserve Program (CRP) mixes are grown or pollinator mixes are established. Palmer amaranth seed in CRP planting mixes have been identified in Illinois, Indiana, Iowa, Minnesota and Ohio. It could be in CRP mixes in other states, too, just not identified yet.

Many grasses and annual weed seeds have a relatively short life, two to five years, but researchers are finding other seeds to be more resilient. The Weed Science Society of America (WSSA) recently released a fact sheet with information about weed seed dormancy.

While all weeds are problematic, waterhemp, marestail, palmer amaranth, giant ragweed and Italian ryegrass are among the worst because they have documented cases of resistance to multiple herbicide groups, which makes them more difficult to control. In addition to resistance, they have the natural ability to evade herbicide control methods.

Doctors don’t prescribe treatment without first diagnosing the ailment. Weed control should work the same way.

With one glance at the yellowed soybean leaves at her feet, Audrey Kalil knows exactly what is ailing them.

Stay one step ahead of mounting resistance issues by knowing how to identify and control