AK, DC NY (Restricted to Commercial Applicators Only)
Special Features
Can be applied as a pre-plant surface-applied, pre-plant incorporated, preemergence, or postemergence treatment for control of most annual grasses and certain broadleaf weeds.
Dual Magnum is taken up by the shoots and/or roots of emerging weeds. This uptake results in the inhibition of shoot and root tissue growth soon after weed germination. Because of this, Dual Magnum will not control emerged weeds. Control weeds that are present by another means, e.g., mechanical means or by another herbicide.
If Dual Magnum is incorporated, do not exceed a 2-3 inch depth. Any tillage after the Dual Magnum incorporation and before planting may not exceed 2-3 inches or the depth of incorporation.
Dry weather following application of Dual Magnum may reduce weed control. Cultivate if weeds develop.
Where reference is made to weeds partially controlled, partial control can either mean erratic control from good to poor, or consistent control at a level below that generally considered acceptable for commercial weed control. Control of these weeds can be erratic, due partially to variable weather conditions. The following procedures may improve the control of weeds listed as partially controlled in Table 1:
Thoroughly till soil to destroy germinating and emerged weeds.
Plant crop into moist soil immediately after tillage. If Dual Magnum is to be used preemergence, apply at planting or immediately after planting.
If available, sprinkler irrigates within 2 days after application. Apply 1/2-1 inch of water. Use lower water volume (1/2inch) on coarse-textured soils and higher volume (1 inch) on fine-textured soils. Also, refer to the section on Center Pivot Irrigation Application for this method of applying Dual Magnum.
If irrigation is not possible and rain does not occur within 2 days after planting and application, weed control may be decreased. Under these conditions, make a uniform, shallow cultivation as soon as weeds emerge.
Weeds Controlled or Partially Controlled by Dual Magnum Applied Prior to Weed Emergence
Barnyardgrass
Crabgrass, large
Crabgrass, smooth
Crowfootgrass
Cupgrass, Prairie
Cupgrass, Southwestern
Cupgrass, woolly
Foxtail, bristly
Foxtail, giant
Foxtail, green
Foxtail, millet
Foxtail, yellow
Goosegrass
Johnsongrass (seedling)
Millet, wild-proso
Panicum, fall
Panicum, Texas
Rice, red
Sandbur, field
Ryegrass, Italian
Sandbur, Southern
Shattercane
Signalgrass, broadleaf
Sorghum (volunteer)
Witchgrass
*See label for the complete list of weeds controlled.
Dual Magnum Herbicide is not labeled for nut grass. Sedgehammer would be a good choice if you are looking for a post emergent product for nut grass.Â