Landscape Management, Weed Watch 2014
WEEDWATCH STANDING SENTINEL TO PROTECT PLANT HEALTH Chamberbiter Phyllanthus urinaria 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 February 2014 52 Photos R Calhoun Left Rebekah D Wallace University of Georgia Bugwood org Recommended Dow AgroSciences solution Dimension specialty herbicide Recommended Dow AgroSciences solution Snapshot specialty herbicide Control tips In turf apply a preemergent herbicide containing isoxaben prior to germination For landscape or container grown ornamentals use a product containing isoxaben and trifluralin Apply preemergent products labeled for chamberbitter first in early spring and again two to three months later for season long control Hand weed any plants that may have emerged prior to application Identification tips This summer annual germinates when soil temperatures reach a consistent 55 F It features rolled vernation and a prostrate growth habit It can be distinguished from large crabgrass D sanguinalis by the absence of hairs on the leaves and sheaths Both species will grow under close mowing but smooth crabgrass can survive and set seed at mowing heights as low as 025 in Control tips When soil temperatures approach 55 F in late winter or spring apply a preemergent crabgrass herbicide Look for products containing the active ingredient dithiopyr It provides season long preemergent and early postemergent crabgrass control Consult the appropriate product label for recommended rates for your area as well as reseeding and overseeding recommendations Identification tips This summer annual is often found in ornamentals and landscape beds but has recently become more problematic in turfgrass Its also known as gripeweed leafflower or little mimosa among other names As a member of the spurge family chamberbitter reproduces by seed found in the fruit attached underneath the branch Its a small erect plant with grooved stems thin leaves and smooth margins It grows from a well developed taproot Smooth crabgras Digitaria ischaemum Trademark of The Dow Chemical Company Dow or an affiliated company of Dow State restrictions on the sale and use of Dimension specialty herbicide products and Snapshot apply Consult the label before purchase or use for full details Always read and follow label directions
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