Landscape Management, Weed Watch 2014
WEEDWATCH Recommended Dow AgroSciences solution Lontrel specialty herbicide COMMON SOWTHISTLE Sonchus oleraceus sowthistle Sonchus like lowers and stems that produce a milky sap Common sowthistle has a taproot and reproduces Leaves are bluish green alternate clasping the stem with prominent rounded spiny lobes Bright yellow lowers bloom from June through August and turn into white puffballs similar to dandelions CONTROL TIPS Identify whether you have annual or perennial sowthistle Herbicides registered for control of one form of sowthistle may not control the other Check the label carefully Clopyralid controls both annual and perennial sowthisthle Tillage and low mowing help control annual sowthistle BROUGHT TO YOU BY PHOTOS COURTESY DR RUSS KLEINMAN WESTERN NEW MEXICO UNIVERSITY DEPARTMENT OF NATURAL SCIENCES AND THE DALE A ZIMMERMAN HERBARIUM LEFT DR RONALD CALHOUN STANDING SENTINEL TO PROTECT PLANT HEALTH Recommended Dow AgroSciences Tur on Ester Ultra BROADLEAF PLANTAIN Plantago major solution specialty herbicide IDENTIFICATION TIPS This annual is hard to distinguish from perennial arvensis because both species are tall weeds with yellow dandelion only by seed IDENTIFICATION TIPS This plant has a short thick taproot that forms a rosette of leaves that lay lat to the ground The broad oval shaped leaves have three to ve prominent parallel veins and are attached to the root system by a brous celery shaped petiole Flowers appear on leafless unbranched stalks that originate from the base of the plant It adapts well to most sites including dry or wet conditions heavy soils and very low mowing heights CONTROL TIPS This species typically requires repeat applications of triclopyr or twoor three way mixtures of 24 D containing products Helpful turf management practices include conducting soil aeration avoiding overwatering and using the proper mower cutting height for each turf species Once under control dense stands of turf and ornamentals will shade the soil surface making establishment of new plantain seedlings more 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 9 JULY 2010 LANDSCAPEMANAGEMENT NET
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