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Dennis C. Odero, Jose V. Fernandez, and Nikol Havranek

L.) ( Legal Information Institute, 2010 ). Recently, S -metolachlor was registered for preemergence weed control in root and tuber vegetable crops Group 1B under Special Local Needs 24 (c) registration through the Third Party Registrations, Inc., a

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Matthew A. Cutulle, H. Tyler Campbell, Monica Farfan, and Phillip A. Wadl

flumioxazin, S -metolachlor, clomazone, and two graminicides (sethoxydim and clethodim). Although napropamide and dimethyl tetrachloroterephthalate are registered for sweetpotato, they provide inconsistent and often inadequate weed control ( Weir, 2001 ). S

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Darren E. Robinson, Kristen McNaughton, and Nader Soltani

pigweed ( Amaranthus retroflexus L.), common ragweed ( Ambrosia artemisiifolia L.), common lambsquarters ( Chenopodium album L.), and eastern black nightshade ( Solanum ptycanthum Dun.). Napropamide, trifluralin, chlorthal dimethyl, and s-metolachlor

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Wheeler G. Foshee III, Collin W. Adcock, Glenn R. Wehtje, Charles H. Gilliam, and Larry W. Wells

Effects of combining labeled rates of halosulfuron (Sandea) and s-metolachlor (Dual Magnum) were evaluated as a preemergence (PRE) application in a randomized complete block designed experiment at the Wiregrass Experiment Station in southeastern Alabama. Treatments were assigned in a factorial arrangement of four levels of halosulfuron (0.0, 0.009, 0.018, and 0.036 lbs. a.i./acre) and six levels of s-metolachlor (0.0, 0.25, 0.50, 0.75, 1.0, and 1.25 lbs. a.i/acre). The purpose of the study was to ascertain possible synergistic effects from combining these two herbicides to control nutsedge at a possible lower cost. Two repetitions were completed in 2005 with data pooled in analysis. Results found no interaction between the halosulfuron and the s-metolachlor and therefore no synergistic affects. Analysis of the main effects revealed that the highest labeled rate of either herbicide gave the highest percent control relative to the nontreated control. Soil activity of halosulfuron in controlling nutsedge has been shown to be less effective than foliar applications. Our own LD90 greenhouse studies confirmed this to be true. We examined four application techniques of halosulfuron (POST both soil and foliar, POST foliar only, POST soil only, and PRE soil only) to determine the LD90. Results revealed that halosulfuron had the lowest LD90 from the treatments with a foliar application. However, some soil activity was observed. Results from field studies indicated that PRE applications of halosulfuron must be at the highest labeled rate to provide effective control. S-metolachlor was equal to halosulfuron on percent control and is lower in cost on a per acre basis.

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Thierry E. Besançon, Baylee L. Carr, and Albert Ayeni

included tigernut cultivars and herbicide application. PRE herbicide treatments consisted of 1.43 lb/acre S -metolachlor (Dual Magnum; Syngenta Crop Protection, Greensboro, NC), 0.25 lb/acre oxyfluorfen (GoalTender; Corteva Agriscience, Indianapolis, IN

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Brian J. Schutte, Abdur Rashid, Israel Marquez, Erik A. Lehnhoff, and Leslie L. Beck

lb/gal, suspension concentrate (Goaltender; Corteva Agriscience, Indianapolis, IN)], pendimethalin [3.8 lb/gal, capsule suspension (Prowl H 2 O, BASF Corp.)], and S -metolachlor [7.62 lb/gal, emulsifiable concentrate (Dual Magnum; Syngenta Crop

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Giovanni Antoniaci Caputo, Sandra Branham, and Matthew Cutulle

. Group 15 herbicides or very-long-chain fatty acid biosynthesis inhibitors such as S -metolachlor and pyroxasulfone would be beneficial to use in direct-seeded Brassica crops if injury could be reduced with a seed treatment. S -metolachlor controls

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Jialin Yu, Nathan S. Boyd, and Peter J. Dittmar

, DCPA, napropamide, and sethoxydim are registered for over-the-top applications ( Zotarelli et al., 2016 ). S-metolachlor controls annual broadleaf and grass weeds and suppress nutsedge species ( Anonymous, 2014 ; Bellinder et al., 1989 ; Sikkema et al

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Russell W. Wallace and John C. Hodges

-scale commercial production. Two herbicides currently registered for nursery production are s -metolachlor and pendimethalin. However, commercial growers are in need of additional herbicides that control adapting weed species or that have longer soil residual

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Erick G. Begitschke, James D. McCurdy, Te-Ming Tseng, T. Casey Barickman, Barry R. Stewart, Christian M. Baldwin, Michael P. Richard, and Maria Tomaso-Peterson

Schmidt (1983) determined that a high rate of oxadiazon (6.7 kg·ha −1 ) slightly reduced hybrid bermudagrass root growth, although adequate root growth was apparent for proper plant function. McCullough et al. (2012) determined that S- metolachlor (1