Results of a long-term evaluation of five weed control systems in northern Illinois indicate that yield is the major difference rather than the actual amount of effective weed control.

When it comes to effective weed control, timing is always critical. But it is particularly important when you are using a total post program since dead weeds with late spraying can still trim your yields.

It makes sense to think that the more inputs you add to a no-till field, the bigger the yield you should expect. But herbicides require different thinking, says Chris Boerboom.

For the first time, the maximum labeled rate of cyan­azine will fall to 3 pounds of active ingredient per acre in 1998. As a result of an agreement between the Environmental Protection Agency and DuPont, products like Bladex, Extrazine II, Cy-Pro and Cy-Pro AT that contain this ingredient are being phased out.