If you still prefer putting your own herbicide recipes together rather than relying on your retailer or a consultant, you could learn valuable lessons from walking through the Purdue University weed control plots — especially if Bill Johnson, Purdue Extension weed control specialist, walks alongside to answer questions.
Most of Purdue’s herbicide comparison plots are located at the Throckmorton farm, south of Romney, Ind., in two separate locations within the farm. Here’s an example of a lesson learned walking the plots this summer. It’s actually a two-for-one lesson, with two key take-home points.
Full rate matters
Look at the two pictures (above and below). One soybean plot was sprayed with Sonic at the full-labeled rate, and the second plot with Sonic at half rate. The other herbicides in the program remained the same in both plots.