Current weed management recommendations emphasize spraying small weeds. One liability of spraying weeds one to two inches tall is the possibility of weeds germinating after application. This may cause growers to delay their applications until weeds are larger, but risk of reduced herbicide activity because weeds are beyond the recommended growth stage for greatest herbicide activity. This occurred with herbicide micro-rate treatments applied at 3- to 4-inch and 5- to 6-inch weed heights.

These studies show that a herbicide micro-rate system containing five different herbicide active ingredients/modes of action, applied at reduced rates, but with a superior adjuvant applied through sequential applications 14 days apart, gives excellent early and season-long control. The sequential application easily controls a broad spectrum of weeds early in the season and clean fields are then supported through quick soybean canopy closure and provide excellent season-long weed control. The data also shows that tank-mixing multiple herbicide mechanisms of action is beneficial to delay weed resistance.