Corn and Soybean Herbicide Premixes

April 14, 2000
Herbicide premixes can often be confusing with respect to components, product equivalents, application rates, and so on. Table 3 and Table 4 list most commercially available corn and soybean herbicide premixes that are marketed in Illinois. The application rates listed in the tables are meant to be used as a reference; for some of these herbicides the application rates will vary depending on soil texture, organic matter, weed species and size, and other considerations. Always consult the respective herbicide label for appropriate application rates.

If you are interested in a rate different from that listed for a particular herbicide, it's relatively simple to do the calculations for your rate of choice. We'll work through an example to make it a little easier to understand.

The application rate of Harness Xtra 5.6L listed in Table 3 is 2.5 quarts per acre. Instead of 2.5 quarts, you want to know how much acetochlor and atrazine are applied at a 2-quart rate of Harness Xtra 5.6L.--Aaron Hager and Christy Sprague

First, convert 2 quarts to gallons:

Next, we can calculate how much acetochlor and atrazine active ingredient are contained in 0.5 gallon of Harness Xtra 5.6L.

Finally, we can also determine product equivalents based on these active ingredient amounts:

Author: Aaron Hager Christy Sprague