Annual Grass and Broadleaf Weeds

Preplant surface, preplant incorporated, or preemergence

sulfentrazone + pyroxasulfone (Authority Supreme)

Supplemental label

Rate 0.141 to 0.5 oz ai/a (4.3 to 15.4 oz/a Authority Supreme)

Time May be applied in the fall for crops planted in the fall or for crops planted the following spring. In spring, may be applied from 30 days before planting up to 3 days after planting.

Remarks In early preplant and fall applications, Authority Supreme can be applied in sequential programs, but do not exceed the maximum use rate per year. Where weeds are emerged, use appropriate tank mixtures for control of the weed species present. Crop seeds must be planted at least 1 inch deep. Do not incorporate greater than 2 inches deep.

Caution Some adverse crop response may occur on coarse textured soils with low organic matter (less than 1.5%) and pH of 7.8 or higher, or on highly eroded soils, or in areas of calcareous outcroppings. Authority Supreme use rates should be reduced in those areas. Inadequate seed furrow closure or shallow planting (less than 1 inch) may result in undesirable crop response. Verify selectivity of Authority Supreme on your variety before applying to avoid injury to sensitive varieties.

Site of action (sulfentrazone) Group 14: protoporphyrinogen oxidase inhibitor; (pyroxasulfone) Group 15: inhibits very long chain fatty acid synthesis

Chemical family (sulfentrazone) Aryl triazinone; (pyroxasulfone) Isoxazoline

Preplant incorporated or preplant surface

pendimethalin + metribuzin (Tripzin ZC)

Rate 0.91 to 1.31 lb ai/a (29 to 42 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.

Remarks Apply in 10 to 40 gal/a water. Thorough incorporation, either by rainfall or mechanical means, is essential for weed control. Applications may be made in late fall when soil temperatures are 45°F or below.

Caution Do not use on clay knobs or poorly covered subsoils.

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

imazethapyr (Pursuit or other trade names)

Rate 0.047 lb ai/a (3 oz/a Pursuit)

Time Apply preplant incorporated within 1 week of planting. Do not incorporate more than 3 inches deep. Apply preemergence after planting but before crop emerges. Application may be followed by shallow incorporation to improve control. Do not make more than one application per year.

Remarks May be tank-mixed with metribuzin to help control lambsquarters or mayweed. Rain is required to move surface applications into weed germination zone. If adequate moisture is not received within 7 days of application, control escaped weeds with rotary hoeing or cultivation.

Caution Consult current label for specific crop rotation restrictions. Do not feed treated garbanzo bean hay or straw to livestock. Do not harvest chickpea within 60 days of application.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Imidazolinone

pendimethalin (Prowl 3.3EC, Prowl H2O, or other trade names)

Rate 0.75 to 1.5 lb ai/a (1.8 to 3.6 pints/a Prowl 3.3EC) or 1.5 to 3 pints/a Prowl H2O). Use lower rate on coarse soils, higher rate on fine soils.

Time Apply up to 60 days preplant and incorporate as label instructs. Up to 1.5 pints/a Prowl H2O may be applied postplant preemergence within 2 days of planting garbanzo beans. Do not apply more than once per cropping season.

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. Consult label for specific crop rotation restrictions.

Caution Do not apply to pea, lentil, or garbanzo bean forage, silage, hay, or straw grown for feed.

Site of action Group 3: microtubule assembly inhibitor

Chemical family Dinitroaniline

saflufenacil + imazethapyr (Optill)

Rate 0.016 lb ai/a saflufenacil + 0.047 lb ai/a (1.5 oz/a Optill)

Time Apply up to 30 days before planting for burndown activity or up to 1 week before planting if mechanically incorporated; do not incorporate more than 3 inches deep. Apply preemergence immediately after planting but before crop emergence.

Remarks Burndown control of emerged grasses or additional broadleaf weeds not listed on the label will require a tank-mix with another herbicide such as glyphosate. Methylated seed oil plus ammonium sulfate is required for burndown applications. See label for more information on adjuvants and tank-mixes.

Caution Do not apply when legumes have reached the cracking stage or after emergence or severe crop injury will occur. Do not make more than one application of Optill per cropping season. Do not apply more than a maximum cumulative amount of 0.045 lb ai/a saflufenacil or 0.047 lb ai/a of imazethapyr per cropping season.

Site of action (saflufenacil) Group 14: protoporphyrinogen oxidase (PPO) inhibitor; (imazethapyr) Group 2: acetolactate synthase (ALS) inhibitor

Chemical family (saflufenacil) Pyrimidinedione; (imazethapyr) Imidazolinone

S-metolachlor (Dual Magnum or 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 cut for hay within 120 days after application. Do not use for forage within 60 days after application.

Site of action Group 15: inhibits very long chain fatty acid synthesis

Chemical family Chloroacetamide

Preplant surface or preemergence

dimethenamid-P (Outlook or 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 precipitation before weed seedlings emerge. Do not apply Outlook early postemergence on garbanzo bean.

Caution Do not apply through any 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

pyroxasulfone (Zidua SC)

Supplemental label

Rate 0.081 to 0.106 lb ai/a (2 to 3.25 oz/a Zidua SC)

Time Apply preplant surface or preemergence.

Remarks Do not apply to coarse-textured soils. Use in combination or sequentially with other herbicides for a broader spectrum of weed control and/or control of emerged weeds.

Caution Do not apply to emerging or emerged chickpea as severe crop injury will occur. Before applying to chickpea, verify with your local seed company (supplier) the selectivity of Zidua SC on your variety to avoid potential Injury.

Site of action Group 15: inhibits very long chain fatty acid synthesis

Chemical family Isoxazoline

Preemergence

linuron (Lorox)

Idaho and Washington only

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