Earlier this year, Michigan became the sixteenth state in the country to confirm a case of glyphosate-resistant horseweed when it was discovered in a Christmas tree plantation.

With severe dry weather hitting some areas of the Corn Belt this year, a number of no-tillers have voiced concerns about the effectiveness of post-emergence herbicide applications in both no-tilled corn and soybeans.

The May issue on No-Till Farmer offered a look at the basic characteristics of adjuvants to help you make more informed purchase decisions. Another good source is the pocket-sized 8th Edition of the Compendium of Herbicide Adjuvants, released in January by Bryan Young, a weed scientist at Southern Illinois University.It is available for $3.Visit www.siu.edu for an order form.

With concerns continuing to develop over glyphosate weed resistance in no-tilled crops, weed scientists keep suggesting that growers start using LibertyLink and Clearfield traits that offer alter- native herbicide modes of action.

There are at least 10 ways adjuvants can make your post-emergence herbicide work harder — and literally hundreds of adjuvant products to choose from. Here’s a look at what’s causing this proliferation and how you can be sure you’re treating your crops right.

Earlier this fall, Syngenta Crop Protection initiated an educational and promotional campaign built around a herbicide resistance management strategy that they've named 2-1-2. The numeric code (below) describes an approach in which no more than two applications of glyphosate are made to one field within a 2-year period.