Proceedings of the Sixty-first Annual Meeting of the Northeastern ...

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128 APPLICATIONS FOR SULFENTRAZONE USE ON GOLF TURFS. S.J. McDonald, Turfgrass Disease Solutions, Pottstown, PA and P.H. Dernoeden, Univ. of Maryland, College Park. ABSTRACT Sulfentrazone was labeled for use on turfgrasses in 2006 and is sold under the trade name of Dismiss ® . According to the label, creeping bentgrass (Agrostis stolonifera), red fescue (Festuca rubra), tall fescue (Festuca arundinacea), perennial ryegrass (Lolium perenne), Kentucky bluegrass (Poa pratensis), bermudagrass (Cynodon dactylon) and zoysiagrass (Zoysia japonica) are tolerant of sulfentrazone. The label, however, does not specify different rates based on turfgrass species. The herbicide’s primary use in turf is for postemergence control of yellow and purple nutsedge (Cyperus spp.), and green and false green Kyllinga (Kyllinga spp.). Numerous broadleaf weed species are listed as being controlled or suppressed. To our knowledge, this herbicide has not been formally evaluated for use on turfgrasses in the Philadelphia to Washington D.C. corridor. Initial studies in College Park, MD, showed that sulfentrazone (0.375 lb ai/A) applied in May 2006 was highly effective in controlling yellow nutsedge (C. esculentus) in perennial ryegrass maintained to a height of 2.5 inches. On creeping bentgrass golf course fairways maintained to a height of 0.5 inches in Lothian, MD a single application of sulfentrazone in July killed exposed leaves, but the yellow nutsedge recovered either from stems or tubers. The aforementioned observation suggests that under low mowing insufficient leaf area is exposed, which may result in less herbicide uptake and therefore inadequate translocation of active ingredient to stems and tubers. Sulfentrazone (0.125, 0.250, and 0.375 lb ai/A) was applied once in August 2006 to “Crenshaw’ creeping bentgrass and Tufcote bermudagrass maintained at 0.5 inches in College Park and no injury was observed. The same rates applied to ‘Zenith’ zoysiagrass maintained at 0.5 inches elicited an objectionable level of injury for about two weeks, especially the high rate. Sulfentrazone (0.125, 0.250, and 0.375 lb ai/A) was applied either once or twice to a golf course fairway in Pottstown, PA beginning on 17 August and sequential treatments were applied 31 August 2006. The fairway consisted of approximately 45% creeping bentgrass, 30% perennial ryegrass, 5% annual bluegrass (Poa annua) and 20% goosegrass (Eleusine indica). The 6 to 8 tiller, seedhead bearing goosegrass was severely injured, but even at the highest rate (0.375 + 0.375 lb ai/A) only 42% control was achieved. Sulfentrazone elicited unacceptable injury to the perennial ryegrass following the sequential application at the highest two rates. Injury to creeping bentgrass was slightly objectionable following the sequential application of the high rate. While the level of goosegrass control was poor, data and observations suggest that an earlier sulfentrazone application to less mature goosegrass may be effective. More research also is needed to elucidate the impact of mowing height and application timing on sulfentrazone performance and the influence of air temperature on the sensitivity of mid-Atlantic turfgrasses to this herbicide. 110
129 SELECTIVE REMOVAL OF CREEPING BENTGRASS WITH MESOTRIONE. J.E. Kaminski, Univ. of Connecticut, Storrs. ABSTRACT Creeping bentgrass (Agrostis stolonifera L.) is a major weed problem in home lawns, athletic fields, and golf course roughs. The influence of mesotrione and triclopyr were assessed for their ability to selectively remove creeping bentgrass from Kentucky bluegrass (Poa pratensis L.). This study was conducted at the University of Connecticut Plant Science Research and Education Facility located in Storrs, CT. An average of 39% creeping bentgrass was present when the study was initiated. Triclopyr and mesotrione each were applied at two rates on a 14-day interval for a total of two, three or four applications. All treatments were applied using a CO 2 pressurized sprayer calibrated to deliver 467 l/ha water. Regardless of herbicide rate, all plots treated with triclopyr and mesotrione exhibited significant injury with 4 and 7 days following treatment, respectively. Three months after the initial treatment (19 September), creeping bentgrass populations within all herbicide-treated plots were reduced when compared to the untreated control. On most rating dates, excellent control (≤ 5% bentgrass) was achieved within plots receiving ≥ 3 applications of mesotrione (0.125 and 0.187 lb ai/A) and three (1.0 lb ai/A) or four (0.5 and 1.0 lb ai/A) applications of triclopyr. Plots treated with two applications of mesotrione (0.187 lb ai/A) resulted in moderate levels of creeping bentgrass control. On the final rating date, there were no differences in creeping bentgrass cover among plots treated with two (0.5 and 1.0 lb ai/A) or three (0.5 lb ai/A) applications of triclopyr or two applications of mesotrione (0.125 oz lb ai/A) and the untreated control. Unlike triclopyr, mesotrione did not appear to inhibit regrowth of Kentucky bluegrass into areas void of turf. 111
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1 Proceedings of the Sixty-first An
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3 NORTHEASTERN WEED SCIENCE SOCIETY
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5 SECTION CHAIRS Agronomy Chair: J.
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7 CARFENTRAZONE AND QUINCLORAC FOR
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9 THE EFFICACY AND CROP TOLERANCE O
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11 EVALUATION OF HERBICIDES FOR CON
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13 BEING HEARD BY THE IR-4 PROJECT.
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15 ABSTRACTS FROM THE 7 TH CONFEREN
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17 HERBICIDE NAMES: COMMON, TRADE,
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20 INTEGRATING WEED CONTROL STRATEG
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22 GIANT HOGWEED ERADICATION IN PEN
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24 EFFECTS OF EMERGENCE PERIODICITY
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26 PRODUCER AND PRODUCTION IMPACTS
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28 A SIMPLE METHOD FOR CLEANING TUF
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30 EMERGENCE AND PERFORMANCE OF TWO
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32 CARFENTRAZONE AND QUINCLORAC FOR
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34 2006 NEWSS SUMMER WEED CONTEST R
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36 INVASIVE AQUATIC WEEDS IN NORTH
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38 AMMONIUM PELARGONATE AS A BIOHER
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40 TRINEXAPAC-ETHYL INFLUENCES EFFI
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42 Table 1. Insect feeding damage,
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44 WEED CONTROL WITH TOPRAMEZONE PR
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46 ROTARY HOE EFFICACY IN CORN: INF
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48 ALFALFA/GRASS FORAGE MIXTURES US
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50 CONTROL OF NEW WEED SPECIES IN T
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52 Table 1. Results of 2006 contain
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54 TOLERANCES OF ORNAMENTAL SHRUBS
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56 2006 WEED MANAGEMENT TRIALS IN C
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58 THE RESPONSE OF FIELD AND CONTAI
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60 THE EFFICACY AND CROP TOLERANCE
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62 Table 2. Plant quality ratings o
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64 EVALUATION OF PROLINE-LINKED PEN
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66 ANNUAL BLUEGRASS AND DOLLAR SPOT
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68 Table 1. Autumn 2005 versus spri
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70 A PRELIMINARY STUDY OF THE NON-N
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72 native species, covering and smo
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74 EFFECTS OF BUCKWHEAT RESIDUE ON
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76 Japanese knotweed control 28 DAT
Page 78 and 79: 78 ENHANCED TOLERANCE TO WEED COMPE
Page 80 and 81: 80 EFFECTS OF PLANTING AND TERMINAT
Page 82 and 83: 82 A UNIFYING FRAMEWORK FOR SPECIES
Page 84 and 85: 84 BIOLOGY OF MULTIFLORA ROSE: AN I
Page 86 and 87: 86 AN OUNCE OF PREVENTION. M.J. Van
Page 88 and 89: 88 HERBICIDE COMPARISON IN WET BLAD
Page 90 and 91: 90 Table 1. Morrow's honeysuckle (L
Page 92 and 93: 92 EVALUATION OF HERBICIDES FOR CON
Page 94 and 95: 94 EVALUATION OF HERBICIDES FOR CON
Page 96 and 97: 96 HOT WATER SYSTEMS FOR VEGETATION
Page 98 and 99: 98 SEEDHEAD SUPPRESSION OF ANNUAL B
Page 100 and 101: 100 ROUGHSTALK BLUEGRASS CONTROL WI
Page 102 and 103: 102 EFFECT OF DEW AND GRANULAR FORM
Page 104 and 105: 104 USE OF TRICLOPYR TO REDUCE ANTI
Page 106 and 107: 106 YELLOW NUTSEDGE CONTROL WITH SU
Page 108 and 109: 108 PRE AND POST EMERGENT ANNUAL BL
Page 110 and 111: 110 PUMPKIN RESPONSE TO HALOSUFSULF
Page 112 and 113: 112 Figure 1. Grass cover following
Page 114 and 115: 114 CHEMICAL CONTROL OF APPLE ROOT
Page 116 and 117: 116 STRAWBERRY PLANTING YEAR WEED C
Page 118 and 119: 118 WEED CONTROL IN NO-TILL PUMPKIN
Page 120 and 121: 120 NATURAL PRODUCT POTENTIAL FOR W
Page 122 and 123: 122 THE IR-4 PROJECT: UPDATE ON HER
Page 124 and 125: 124 PEDIGREE OF A PESTICIDE. D.R. S
Page 126 and 127: 126 SEEDHEAD SUPPRESSION OF ANNUAL
Page 130 and 131: 130 HORSEWEED: FROM OBSCURITY TO TH
Page 132 and 133: 132 RECENT FINDINGS ON THE FIELD BE
Page 134 and 135: 134 HORSEWEED RESPONSE TO NO-TILL P
Page 136 and 137: 136 THE MASSACHUSETTS EXAMPLE: ONE
Page 138 and 139: 138 Supplemental NEWSS Abstracts (p
Page 140 and 141: 140 ABSTRACTS AND BIOGRAPHIES FOR P
Page 142 and 143: 142 EVALUATION OF AN HERBICIDE APPL
Page 144 and 145: 144 ALUMINUM TREATMENT FOR PHOSPHOR
Page 146 and 147: 146 BIOLOGICAL CONTROL OF AQUATIC W
Page 148 and 149: 148 THE 2002 FARM BILL AND ITS EFFE
Page 150 and 151: 150 LAND USE PRACTICE IMPACTS ON NO
Page 152 and 153: 152 A NEW STANDARD FOR DEFINING AQU
Page 154 and 155: 154 PORTRAIT OF THE HEALTH STATUS O
Page 156 and 157: 156 TEN YEARS OF VARIABLE WATER MIL
Page 158 and 159: 158 Northeastern Weed Science Socie
Page 160 and 161: 160 meeting attendance numbers have
Page 162 and 163: 162 members or to members of the Ex
Page 164 and 165: 164 primary areas that had increase
Page 166 and 167: 166 1 st place: Evaluation of Kentu
Page 168 and 169: 168 d) Resolutions Committee Appoin
Page 170 and 171: 170 2005, Hilary Sandler and Brent
Page 172 and 173: 172 (Ornamentals), Rakesh Chandran
Page 174 and 175: 174 Total Expenses $38,227.24 Total
Page 176 and 177: 176 PUBLIC RELATIONS Brent Lackey A
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178 • 2 nd place team: Guelph tea
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180 WSSA REPRESENTATIVE Jeffrey Der
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182 b. Legislative Visits training
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184 b. Selection of a WSSA Member f
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186 WSSA Provides Comments to the C
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188 $179 million, in contrast to a
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190 NEWSS PAST PRESIDENTS Gilbert H
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192 1986 John R. Havis University o
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194 DISTINGUISHED MEMBERS 2002 Brad
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196 1991 1 Elizabeth Maynard Cornel
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198 COLLEGIATE WEED CONTEST WINNERS
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200 1996 - Penn State Agronomy Farm
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202 RESEARCH POSTER AWARDS 1983 1.
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204 1998 1. Weed Control Studies wi
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206 INNOVATOR OF THE YEAR 1986 Nath
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208 1960 The Influence of Cultivati
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210 1975 1. Control of Jimsonweed a
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212 1985 1. Peach Response to Sever
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214 Chris Benedict Cornell Universi
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216 Robert A. DeWaine Monsanto 505
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218 Robert Hedberg USDA/CSREES Scie
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220 Brian G Lackey Weeds Inc. 250 B
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222 Thomas Molloy University of Mai
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224 John Roy RWC, Inc. PO Box 876 2
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226 John R. Teasdale USDA-ARS Build
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228 HERBICIDE NAMES: COMMON, TRADE,
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230 Common Name Trade Name Chemical
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238 COMMON PRE-PACKAGED HERBICIDES
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240 Trade Name Resolve SG Rhino Rou
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242 COMMON AND CHEMICAL NAMES OF HE
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244 Heck, G.R., 114 Henry, G.M., 15
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246 MAIN SUBJECT INDEX (Herbicides,
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248 glyphosate, 29, 38, 39, 57, 70,
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250 shepherd's purse, 56 s-metolach
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