Landscape Management, December 2014
WEEDWATCH STANDING SENTINEL TO PROTECT PLANT HEALTH Recommended Dow AgroSciences Trademark of The Dow Chemical Company Dow or an affliated company of Dow State restrictions on the sale and use of Defendor apply Consult the label before purchase or use for full details Always read and follow label directions 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 solution Defendor specialty herbicide Recommended Dow AgroSciences solution Defendor specialty herbicide ContRol tipS Clean up any established black medic with a postemergent herbicide containing forasulam Time your application in spring or fall Black medic germinates when soil temperatures are between 50 F and 75 F Apply a preemergent herbicide containing dithiopyr prior to germination or just after elimination via postemergent control Nitrogen fertility and aeration also can help encourage a dense turf stand minimizing black medic establishment BlACk mEDiC Medicago lupulina iDentifiCAtion tipS This lowgrowing winter annual has trifoliate leaves similar to white clover T repens Leafets have prominent veins with the terminal leafet on a short stem Short hairy slender stems are reddish in color and have a tendency to sprawl Bright yellow fowers grow in clusters each producing a single seed Active growth begins with cooler temperatures and increased moisture ContRol tipS Apply a postemergent systemic herbicide that will move from the treated foliage throughout the plant and into the extensive root system to completely control this weed Consider adjusting your fertility program to include more nitrogen and less phosphorus Proper turf maintenance also will greatly reduce clovers prevalence In addition to fertilization proper mowing and watering will encourage healthy turf iDentifiCAtion tipS This creeping summer annual is common in lawns stressed from compaction heat and drought Often confused with clover Trifolium spp black medic is distinguished by its bright yellow fowers and leaf arrangement The leaf is similar to clover and other legumes with three leafets but black medics center leafet is on a separate petiole Prostrate stems 1 in to 2 in long grow from a taproot lArgE Hop ClovEr Trifolium campestre LANDSCAPEMANAGEMENT NET December 2014 16 Photos s AsKEW
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