Have you noticed how in the last few years there has been lots of talk about cover crops, soil health, autonomous tractors, down pressure and other planter-related topics, all the new fungicides, new insects like soybean gall midge – and as always, a non-stop focus on weather, grain markets, and farm news?
SURE, ALL THOSE THINGS ARE IMPORTANT, BUT SOMETIMES IT IS EASY TO TAKE OUR EYE OFF ONE OF THE MOST FUNDAMENTAL THINGS WHEN IT COMES TO PRODUCING MORE BUSHELS AND EARNING MORE MONEY – WEED CONTROL.
Chances are, you are fighting waterhemp, Palmer pigweed, kochia, marestail, common or giant ragweed, or Italian ryegrass on your farm. Unfortunately, all of these weeds not only have biotypes resistant to Roundup, they have resistance to other herbicides, too. Let’s just say, for example, there are six chemical families that will control a certain weed. Eventually, the weed becomes resistant to three. Which is the best way to stop that weed from becoming resistant to the remaining three? To use all three of those at once? Or to apply each of them separately?
THE ANSWER IS TO USE ALL THREE AT ONCE.
Here’s the most important thing to understand when it comes to resistant weeds: A dead weed can never become a resistant weed. In all likelihood, there is a biotype out there already resistant to each herbicide on the market today. If you get unlucky and end up with that weed and that particular strain of the weed in your field, you only use one mode of action, and that one weed tolerates it, now you’ve got a massive problem, and our entire country does, as well.