Dow AgroSciences
Registered until
Registration number
Active materials

General Information
IPA-4 herbicide is intended for selective control of many broadleaf weeds in certain 'crops, including, cereal grains (wheat, barley, millet, oats and rye), corn (field corn, popcorn and sweet corn), fallow land and crop stubble, sorghum (grain and forage sorghum), and soybeans (preplant burndown application only), forests, rangeland and established grass pastures, Conservation Reserve Program (CRP) acres, non-cropland, grasses grown for seed or sod, and ornamental turf.
Apply IPA-4 as a water or oil-water spray during warm weather when target weeds or woody plants are actively growing. Application under drought conditions will often give poor results. Use low spray pressure and coarse sprays to minimize drift. Generally, the lower dosages recommended on this label will be satisfactory for young, succulent growth of susceptible weed species. For less susceptible species and under conditions where control is more difficult, use higher recommended rates. Deep-rooted perennial weeds such as Canada thistle and field bindweed and many woody plants usually require repeated applications for satisfactory control. Consult your State Agricultural Experiment stations or Extension Service Weed Specialists for recommendations from this label that best fit local conditions.

Registered for culturesRatePreharvest Interval
Winter wheat1 pt
Spring wheat1 pt
Spring barley1 pt
Winter barley1 pt
Millet1 pt
Spring oats1 pt
Winter oats1 pt
Winter rye1 pt
Spring rye1 pt
Corn1 - 2 pt7
Sweet corn1 - 2 pt45
Pasture2 - 4 pt7
Sorghum1 pt30
Apples1 - 2 pt14
Pears1 - 2 pt14
Nuts1 - 2 pt60
Hazelnuts1 - 2 pt60
Walnut1 - 2 pt60
Peanuts1 - 2 pt60
Pistachios1 - 2 pt60
Soybeans1 - 2 pt
Sugarcane2 - 4 pt