Landscape Management, Weed Watch 2014
WEEDWATCH STANDING SENTINEL TO PROTECT PLANT HEALTH WILD CARROT Daucus carota 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 JUNE 2012 32 PHOTOS BY DR SHAWN ASKEW FAR LEFT L L BERRY BUGWOOD ORG Recommended Dow AgroSciences solution Dimension specialty herbicide Recommended Dow AgroSciences solution Lontrel specialty herbicide numerous small white lat topped lowers CONTROL TIPS Apply a post emergent herbicide when the wild carrot is in the seedling stage Yearly applications are necessary to control the young seedlings that emerge from the seed bank This weed species thrives in sandy and undisturbed areas A well maintained lawn with thick dense turf can outcompete the establishment of wild carrot State restrictions on the sale and use of Dimension and Lontrel apply IDENTIFICATION TIPS This low trailing summer annual can act as a perennial in some conditions It is common in lawns stressed from compaction heat and drought Often confused with clover black medic is easily distinguished by the bright yellow lowers and leaf arrangement The leaf is similar to clover and other legumes with three lealets but black medics center lealet is on a separate petiole Prostrate stems 1 to 2 in in length grow from a taproot CONTROL TIPS Clean up any established black medic using a post emergent herbicide containing two or more auxinic herbicides such as clopyralid triclopyr or luroxypyr Time your application in spring or fall Control starts with elimination of seed production as each plant can produce thousands of seeds Black medic germinates when soil temperatures are between 50 F and 75 F Apply a pre emergent herbicide prior to germination or just after elimination via post emergent control IDENTIFICATION TIPS This biennial resembles a garden carrot in its rst year of growth Also known as Queen Annes lace it produces a rosette of lobed deeply dissected leaves in the rst year of growth Leaves have long petioles hairless on the upper surface but may have hairs on the veins and margins of the lower surface The foliage has a carrot like odor During its second year the plant starts producing stalks with umbels of BLACK MEDIC Medicago lupulina
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