flufenacet + metribuzin (Axiom DF)
Rate 0.136 to 0.34 lb/a flufenacet and 0.034 to 0.085 lb/a metribuzin (4 to 10 oz/a Axiom DF)
Time Apply from wheat germination to the two-leaf growth stage.
Remarks For best results: 1) Plant wheat after the first flush of weeds has emerged and is destroyed by tillage; or in no-till winter wheat, apply a nonselective herbicide to control emerged weeds at or before planting; 2) Apply Axiom before the weeds' one-leaf stage; 3) Use the highest specified rate depending on soil texture. Less than 0.5 inch of rainfall or irrigation within 2 weeks following application may result in reduced weed control. For optimum Italian ryegrass control, apply a spring postemergence grass herbicide such as Axial Bold or Osprey.
Caution Winter wheat must be planted at least 1.5 inches deep. Certain wheat varieties are sensitive to Axiom; see label. Do not exceed 10 oz/a Axiom DF per season.
Site of action (flufenacet) Group 15: inhibits very long chain fatty acid synthesis; (metribuzin) Group 5: photosystem II inhibitor
Chemical family (flufenacet) Oxyacetamide; (metribuzin) Triazine
mesosulfuron + thiencarbazone (Osprey XTRA)
Suppression only of rattail fescue
Rate 0.013 to 0.018 lb ai/a (3.2 to 4.75 oz/a Osprey XTRA)
Time Apply to winter wheat from wheat emergence to the two-node stage. Apply from one-leaf to two-tiller growth stage. See label for application timing and weed size.
Remarks Use the 4.75 oz/a rate for Italian ryegrass and rattail fescue. Treat heavy infestations of grassy weeds before they compete with the crop. Use only a non-ionic surfactant and a nitrogen source for adjuvants. Do not apply Osprey XTRA more than once per crop year.
Caution For winter wheat only.
Site of action Group 2: acetolactate synthase (ALS) inhibitor
Chemical family Sulfonylurea
pyroxasulfone (Zidua or Zidua SC)
Rate 0.053 to 0.093 lb ai/a (1.0 to 1.75 oz/a Zidua) preplant surface or preemergence; 0.037 to 0.106 lb ai/a (0.7 to 2.0 oz/a Zidua) delayed preemergence; 0.074 to 0.133 lb ai/a (1.0 to 2.5 oz/a Zidua) early postemergence
Rate 0.041 to 0.106 lb ai/a (1.25 to 3.25 oz/a Zidua SC) preplant surface or preemergence; 0.041 to 0.081 lb ai/a (1.25 to 2.5 oz/a Zidua SC) delayed preemergence; 0.057 to 0.130 lb ai/a (1.75 to 4 oz/a Zidua SC) early postemergence
Time Apply preplant surface or preemergence (supplemental label for Idaho, Montana, Oregon, and Washington only); or delayed preemergence as a broadcast spray to the soil surface when 80% of germinated wheat seeds have at least 0.5-inch long shoots up to wheat spiking; or early postemergence from wheat spiking up to 4 tillers.
Remarks Do not apply preplant surface or preemergence to coarse-textured soil. Wheat must be planted 1.0- to 1.5-inches deep when using preplant or preemergence applications. Otherwise, wheat must be planted 0.75 to 1.5 inches deep with good seed row closure and soil coverage to avoid injury. Activity may be reduced if crop residue soil cover exceeds 25%. Must be incorporated with rainfall or irrigation after application for optimal weed control. For herbicide resistance management, particularly for Italian ryegrass, apply a spring postemergence grass herbicide such as Axial Bold or PowerFlex.
Caution Do not exceed a total of 2.5 oz/a of Zidua or 4 oz/a Zidua SC per season. Do not apply Zidua SC preemergence if 0.25 inch or more of rain is expected within 48 hr after application. Do not apply to Durum wheat. Do not apply preplant incorporated. Do not apply delayed preemergence to broadcast seeded wheat.
Site of action Group 15: inhibits very-long-chain fatty acid synthesis
Chemical family Isoxazoline
pyroxasulfone + carfentrazone (Anthem Flex)
Rate 0.063 to 0.141 lb ai/a (2.0 to 4.5 oz/a Anthem Flex)
Time Apply 30 days preplant through fourth tiller. See label for application timing, soil type, and rate information.
Remarks For Italian ryegrass control. Apply preplant through preemergence only to soils with a CEC greater than 15, pH less than 7.5, and organic matter greater than 2%. If soils do not meet these requirements, Anthem Flex must be applied as a delayed preemergence or postemergence treatment. Results are best when applied prior to weed emergence. Wheat must be planted a minimum of 1 inch deep. Must have a minimum of 0.4 inch of rain to activate. May be applied as a single treatment or sequential treatments. May be applied with other labeled herbicides. For herbicide resistance management, particularly for Italian ryegrass, apply a spring postemergence grass herbicide such as Axial Bold or PowerFlex.
Caution Do not exceed a total of 4.5 oz of Anthem Flex per season. Do not apply to Durum wheat. See label for rotational restrictions. Do not make postemergence applications to foliage that is wet from dew, rain, or irrigation, as increased speckling may occur.
Site of action (pyroxasulfone) Group 15: inhibits very-long-chain fatty acid synthesis; (carfentrazone) Group 14: protoporphyrinogen oxidase inhibitor.
Chemical family (pyroxasulfone) Isoxazoline; (carfentrazone) Triazolinone