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A WEED REPORT from the book Weed Control in Natural Areas in the Western United States Perennial pepperweed <br /> quicker burndown.Telar can be used near water,but cannot be applied to water.Chlorsulfuron is <br /> included with aminocyclopyrachlor in Perspective.This combination(i.e.,formulation)is expected to <br /> provide good control,but has not been reported. <br /> imazapic Rate:8 to 12 oz product/acre(2 to 3 oz a.e./acre) <br /> Plateau Timing:Postemergence from seedling to flowering stage.Most effective from the bud to the late <br /> flowering stage. <br /> Remarks:Imazapic gives effective control with some soil residual activity.It can be used in <br /> combination with giyphosate(premix trade name of Journey).Selective to most native grasses.Nigher <br /> rates may suppress seedings of some cool-season grasses.Add a methylated seed oil.imazapic is not <br /> registered for use in California. <br /> Imazapyr Rate:1 to 2 qt product/acre(0.5 to 1 lb a.e./acre) <br /> Habitat Timing:Postemergence from seedling to flowering stage.Most effective from the bud to the late <br /> flowering stage. <br /> Remarks:Habitat is registered for aquatic use.Also effective following early season mowing and/or <br /> disking.It is nonselective,has long soil residual activity,and leaves more bare ground than other <br /> treatments,even a year after application.Add a spray adjuvant. <br /> Metsulfuron Rate:1 to 2 oz product/acre(0.6 to 1.2 oz a.i./acre) <br /> Escort Timing:Postemergence from seedling to flowering stage.Most effective at flower bud and flowering <br /> stage. <br /> Remarks:Metsulfuron has similar activity compared to chlorsuifuron.Metsulfuron has some soil <br /> residual activity.Always use a surfactant.Metsulfuron can be tank-mixed with 2,4-D for quicker <br /> burndown.Other premix formulations of metsulfuron can be used at similar application timing.These <br /> include Cimarron Max(metsulfuron+dicamba+2,4-D)and Cimarron X-tra(metsulfuron+ <br /> chlorsulfuron).Metsulfuron is not registered for use in California. <br /> Propoxycarbazone- Rate:0.9 to 1.2 oz product/acre(0.63 to 0.84 oz a.i./acre) <br /> sodium Timing:Postemergence to young,rapidly growing plants. <br /> Canter R+P Remarks:Propoxycarbazone is a broad-spectrum herbicide that will control many species.It will <br /> provide only partial control of perennial pepperweed.Perennial grass species vary in tolerance.A non- <br /> ionic surfactant should be added at 0.25 to 0.5%v/v solution. <br /> RECOMMENDED CITATION:DiTomaso,J.M.,G.B.Kyser et al.2013. Weed Control in Natural Areas in the Western United States. <br /> Weed Research and Information Center,University of California.544 pp. <br /> 3 of 3 2013 <br />