There are many prepackaged herbicide mixtures for field corn. Although it is usually known which herbicides are included, questions do arise about the relative amounts of each herbicide in these mixtures. Information about the active ingredients in some of these products is summarized in Table 3.7.5.
Prepackaged herbicide mixtures eliminate the inconvenience of tank mixing herbicides to obtain broad spectrum (grass and broadleaf) weed control needed in most fields. Not only do they make spraying easier, but they can eliminate some of the problems associated with container disposal. Finally, these mixtures often can be purchased for less than the cost of equivalent amounts of the individual products. The disadvantage of these premixes is that the user sacrifices some flexibility in adjusting the rates of each herbicide to what is needed in a given situation.