Landscape Management, Weed Watch 2014
WEEDWATCH STANDING SENTINEL TO PROTECT PLANT HEALTH For more information regarding these and other turf weeds and related control technologies and tips please visit www DowProvesIt com or call 800 255 3726 BROUGHT TO YOU BY LANDSCAPEMANAGEMENT NET DECEMBER 2013 50 PHOTOS S ASKEW LEFT ROB ROUTLEDGE SAULT COLLEGE BUGWOOD ORG Recommended Dow AgroSciences solution Lontrel specialty herbicide Recommended Dow AgroSciences solution Defendor specialty herbicide CONTROL TIPS Long term cultural control requires removing existing plants before they lower and produce viable seed Hand weeding followed by a layer of mulch works well in landscape settings To control in turfgrass or bare ground areas apply a postemergent herbicide containing lorasulam when catchweed is actively growing Florasulam can be applied at the same time the rst fertilizer and liquid preemergent applications of the season are made CATCHWEED Galium aparine IDENTIFICATION TIPS Purple cudweed is a lowgrowing winter or summer annual or sometimes biennial as some plants will survive into the second year to achieve maturity It overwinters as a basal rosette but it usually grows from an upright stem in the spring Seed leaves and rst true leaves have white to light gray woolly hairs Mature plants are sparsely branched and grow 8 in to 20 in tall Flower heads are crowded spiked and densely arranged on the stems or at the base of leaf stalks CONTROL TIPS Cudweed is a relatively easy weed to control First maintain a dense actively growing turf through proper mowing fertilization and irrigation Its best to control purple cudweed in the spring or fall when actively growing Two three and four way herbicides containing clopyralid provide good postemergent control Apply to the plant before seed stalk formation IDENTIFICATION TIPS Also known as rough bedstraw this annual is commonly found in moist shady areas Seed leaves are oblong to egg shaped with slightly notched tips Mature leaves are whorled with six to eight leaves per whorl Small downward curved prickles cover the stems and leaves Small four parted white or greenish white lowers grow on short branches originating in the leaf axils on the upper parts of the plant PURPLE CUDWEED Gnaphalium purpureum Trademark of The Dow Chemical Company Dow or an af liated company of Dow State restrictions on the sale and use of Defendor and Lontrel apply Consult the label before purchase or use for full details Always read and follow label directions
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