Home Indiana Agriculture News Purdue’s Johnson Worried About Reported Herbicide Shortage

Purdue’s Johnson Worried About Reported Herbicide Shortage


The cutoff date for using dicamba in Indiana fields is rapidly approaching. The dicamba cutoff date is June 20th.

Purdue Professor of Weed Science Dr. Bill Johnson told HAT, “For the fields that are still needing to be treated for weed control now, we have to be really cognizant of the weather conditions and the wind conditions and our surrounding crops to make sure that when we are able to make this application over the next week or so that we can do it in a manner that minimizes the chance it will move off site.”

So, after June 20th, farmers will need to rely on other herbicides for weed control. However, Johnson is hearing about a shortage of glyphosate and glufosinate that could have a significant impact.

“What we hear is that there’s plenty of active ingredient, but the inerts that were used by the formulating plants are not being able to be delivered to the formulations plants, and so what we’re hearing is that, in a lot of cases, the retailers have enough glyphosate or glufosinate on hand to do a single trip across the field. Where that’s likely going to impact growers is if they need to do re-sprays later in the summer, they may not have the product available to do the re-sprays.”

Johnson says it’ll be imperative that you use your glyphosate and glufosinate in the best way possible the first time around.

“Making sure that you use the right rate, that you have your sprayer set up for optimum activity, and that you’re using the right tank mix partners as well to pick up the weeds that those two herbicides can be weak on. So, you do the weed control operation right the first time and you’re not reliant on a re-spray of those active ingredients.”