Landscape Management, Weed Watch 2014
WEEDWATCH STANDING SENTINEL TO PROTECT PLANT HEALTH Common burdock Arctium minus 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 April 2014 54 PHOTOS J M Garg Wikimedia left University of Illinois Extension Recommended Dow AgroSciences solution Confront specialty herbicide Recommended Dow AgroSciences solution LockUp specialty herbicide emerges from the center of the rosette A corolla of rose purple flowers covered in slender hooked bracts form at the top of the stalks in late spring to mid summer Control tips Postemergent herbicides containing penoxsulam are most effective when applied in the first year during the rosette stage Hand pulling or digging can be an effective control method for small infestations if conducted prior to seed production Identification tips This mat forming perennial is commonly found south of the transition zone and along coastal areas Opposite leaves with small teeth at the outer tip grow on hairy branching stems Its stem is angular and rigid when rolled between the fingers Purple to white flowers emerge around the tip of a brown seed stalk forming a match head appearance Matchweed spreads by seeds and stolons along prostrate stems Control tips For optimum control use a selective postemergent herbicide containing triclopyr and clopyralid when matchweed is in the four leaf to flower stage of growth Maintain a healthy lawn by fertilizing and mowing at the proper height and frequency Healthy grass can outcompete matchweed for light water and nutrients to reduce the population Matchweed prefers low moist areas Improve aeration to prevent infestations Identification tips Also known as wild rhubarb this biennial weed reproduces by seed Seedlings emerge in early spring The light green fleshy leaves are oval and slightly notched at the tips In the second year plants emerge from the root and can grow as tall as 10 feet Adult leaves are triangular and coarsely veined The upper surface is green and covered with stiff straight hairs The lower surface is whitish and woolly A branched flower stalk Matchweed Lippia nodiflora Trademark of The Dow Chemical Company Dow or an affiliated company of Dow Confront is not for sale or use in Nassau and Suffolk counties New York Other state restrictions on the sale and use of Confront apply Consult the label before purchase or use for full details State restrictions on the sale and use of LockUp apply Consult the labels of products containing LockUp before purchase or use for full details Always read and follow label directions
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