Landscape Management, Weed Watch 2014
WEEDWATCH STANDING SENTINEL TO PROTECT PLANT HEALTH WILD VIOLET Viola spp CORN SPEEDWELL Veronica arvensis IDENTIFICATION TIPS This low growing winter annual thrives in open turf and often appears in solid stands It has small lower leaves that are rounded and toothed the upper leaves are pointed The plant which is entirely covered in ne hairs grows small bright blue lowers with white throats A distinctive heartshaped seedpod grows below the lowers Corn speedwell does not typically last long after lowering and cannot live in high temperatures CONTROL TIPS Increase turfgrass density and minimize open turf areas with proper fertilization mowing and irrigation Because winter annuals germinate in the fall treat this weed prior to germination in late summer or early fall with a preemergent herbicide containing dithiopyr If speedwell is established treat early stages of growth with a product containing clopyralid or triclopyr IDENTIFICATION TIPS This low growing clumping perennial can reach heights of up to 5 in It grows from a dense brous root system Small pansy like lowers feature ve blue violet lilac or white petals Heart shaped leaves with scalloped edges are often cupped toward the petiole to form a funnel shape Its most often found in cool shady moist fertile soil CONTROL TIPS Wild violet is dif cult 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 AUGUST 2013 46 PHOTOS F YELVERTON LEFT ROB ROUTLEDGE SAULT COLLEGE BUGWOOD ORG Recommended Dow AgroSciences solution Dimension specialty herbicide Recommended Dow AgroSciences solution Tur on Ester Ultra specialty herbicide to control because of its aggressive growth waxy leaves and resistance to many herbicides Apply a postemergent broadleaf herbicide as soon as violets reach the two leaf growth stage Repeat applications may be necessary if the violets are well established In turfgrass and sites labeled for use apply a postemergent herbicide containing triclopyr either alone or in two and three way combinations with other broadleaf herbicides Trademark of The Dow Chemical Co Dow or an af liated company of Dow State restrictions on the sale and use of Dimension specialty herbicide products and Turlon Ester Ultra apply Consult the label before purchase or use for full details Always read and follow label directions
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