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No insect biocontrol agents are available for hoary alyssum. <br /> Digging and hand pulling can provide effective control if persistent. <br /> I loary alyNsum invades a field near Lste.Park <br /> A Top <br /> Hoary cress (Cardat-ia draba) & Perennial pepperweed (Lepidium latifolium) <br /> Hoary <br /> ka Cress <br /> ' and <br /> dt <br /> .x <br /> Photo tak. n in Ptah <br /> :n tlt:rnic,tatton r,hoa;% cr,c> <br /> 1'c:err,ral E>�1'}�.t;:ccd <br /> perennial pepperweed are perennial plants of the mustard family.These species are <br /> problem weeds in rangeland,pasture and roadsides.Perennial pepperweed is <br /> generally more common on moist sites.Hoary cress greens up and blooms quite early. <br /> The most effective herbicides for controlling these perennial mustards are Escort,Perspective,Plateau/Panoramic,and Telar. <br /> Herbicide application needs to occur at flowering for most effective results.Mustard species are frequently referenced in the <br /> herbicide guide because of this plant family's unique tolerance to numerous herbicides used for managing noxious weeds. <br /> No insect biocontrol agents are available for control of these species.Mustards are generally not palatable to livestock. <br /> Hand pulling and digging are generally not effective for control of these perennial weeds unless persistent.Mowing can provide <br /> suppression and reduced seed production. <br /> 1 Top <br /> Dalmatian toadflax (Linaria dalmatica, Lirraria genistifolia) <br /> A member of the snapdragon family that was introduced to this country from Eurasia as an ornamental plant.Dalmatian toadflax <br /> is termed an'escaped ornamental',a former garden species that has become an invasive weed problem in rangeland and natural <br /> areas. <br /> Dalmatian toadflax is particularly abundant on the shallow,rocky soils along Colorado's front-range.This perennial plant <br /> reproduces from seed and vegetative root buds.Seeds can remain viable in the soil for at least 10 years.Plants grow to 3 feet tall <br /> and produce yellow flowers throughout the summer. <br />