Preplant incorporated
pendimethalin + metribuzin (Tripzin ZC)
Rate 0.91 to 1.375 lb ai/A (29 to 44 oz/A Tripzin ZC).
Time Apply up to 60 days preplant and incorporate within 7 days of application. Do not apply more than once per cropping season. Do not apply when the air temperature is below 45°F.
Remarks Apply in 10 to 40 gal/A water.
Caution Do not use on coarse-textured soils, sandy soils, or soils with less than 1.5% organic matter. Do not apply to "Estin" lentils.
Site of action (pendimethalin) Group 3: microtubule assembly inhibitor; (metribuzin) Group 5: photosystem II inhibitor
Chemical family (pendimethalin) Dinitroaniline; (metribuzin) Triazine
Preplant incorporated or preemergence
pendimethalin (Prowl 3.3EC, Prowl H2O, and other trade names)
Rate 0.75 to 1.5 lb ai/A (1.8 to 3.6 pints/A pendimethalin 3.3EC; 1. 5 to 3.0 pints/A Prowl H2O). Use lower rate on coarse soils, higher rate on fine soils.
Time Apply up to 60 days preplant, and incorporate by following label instructions. Prowl H2O may be preplant surface applied up to 30 days prior to planting in reduced tillage systems.
Remarks Incorporate thoroughly 1 to 2 inches deep. Apply in at least 10 gal/A water, or in 20 gal/A or more liquid fertilizer. Adequate rainfall or irrigation after surface application prior to weed germination will provide the most effective weed control. Herbicide performance from surface application may be decreased compared to soil incorporated applications.
Caution Do not apply to pea or lentil forage, silage, hay, or straw grown for feed.
Site of action Group 3: microtubule assembly inhibitor
Chemical family Dinitroaniline
S-metolachlor (Dual Magnum and other trade names)
Rate 0.95 to 1.91 lb ai/A (1 to 2 pints/A Dual Magnum)
Time Apply preplant incorporated or preemergence.
Remarks Application rate depends on soil type and organic-matter content.
Caution Do not exceed an incorporation depth of 2 to 3 inches. Do not cut for hay within 120 days after application.
Site of action Group 15: inhibits very long chain fatty acid synthesis
Chemical family Chloroacetamide
Preplant or preemergence
dimethenamid-P (Outlook and other trade names)
Rate 0.56 to 0.98 lb ai/A (12 to 21 oz/A Outlook)
Time Apply preplant or preemergence.
Remarks Consult label for application rate in relation to soil type. Use lower rate on coarse-textured soils with low organic matter or low cation exchange capacity (CEC). Control is best if incorporated into soil by overhead moisture or light tillage (1 to 2 inches deep) before weed seedlings emerge. Do not apply Outlook early postemergence.
Caution Do not apply through any type of irrigation system. To avoid injuring sensitive varieties, before applying Outlook consult your local seed company supplier about your variety's sensitivity.
Site of action Group 15: inhibits very long chain fatty acid synthesis
Chemical family Chloroacetamide
Preemergence
linuron (Lorox)
Rate 0.5 to 1.0 lb ai/A (1.0 to 2.0 lb/A of Lorox)
Time Apply after planting but preemergence to the crop.
Remarks Use lower rates on coarse-textured soils and higher rates on heavier-textured soils. For Idaho and Washington only: winter wheat and winter barley may be planted 4 months after application; do not apply more than 1.25 lb/A Lorox if the field will be rotated to winter wheat or winter barley in the fall or winter and average annual precipitation is less than 16 inches.
Caution Do not apply to sand or loamy sand soil types or to soils with less than 1% organic matter.
Site of action Group 7: photosystem II inhibitor
Chemical family Urea