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.

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.

Back in 1997, a number of Michigan farmers found high levels of white mold disease in their soybeans. This was especially true in fields planted with Roundup Ready soybeans where weeds were controlled with Roundup Ultra herbicide.