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

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44 WEED CONTROL WITH TOPRAMEZONE PROGRAMS IN CORN. W.B. O’Neal, R.M. Porter, P.D. Vaculin and J.E. Orr, AMVAC Chemical Corporation, Newport Beach, CA. ABSTRACT Topramezone is a 4-HPPD inhibitor herbicide for postemergence weed control in corn (Zea mays L.). Topramezone is effective against many broadleaf weed species, and also active against several grass weed species common to US and Canadian corn production. Field research trials were conducted to study tank mix combinations of topramezone with other postemergence herbicides in corn. Topramezone used in these studies was formulated in a 2.8 lb/gallon suspension concentrate. Combination programs were studied with products offering different modes of action including acetolactate synthase, EPSP synthase and photosystem II inhibitors. Topramezone was evaluated at rates of 0.011 to 0.016 lb/A with full and reduced rates of companion products. These trials have demonstrated practical utility of these combinations for enhancement of performance against a broader spectrum of weed species. By encompassing more than a single mode of action, these combination programs can also reduce selection pressure for resistant weed biotypes. 26
45 THE IMPACT OF CULTIVATION TIMING AND INCREASED PLANT POPULATION DENSITY ON WEED CONTROL IN ORGANIC SOYBEANS. S.C. Reberg-Horton, North Carolina State Univ., Raleigh. ABSTRACT Weed management remains one of the most challenging aspects of organic crop production. This study was undertaken with the help of organic soybean farmers to examine the effectiveness of the most common weed management tools on their farms: stale seed bedding, blind cultivation and increased seeding rates. In one experiment, soybean seeding rates of 187,500, 312,500, 437,500, and 562,500 were planted under organic and conventional weed management. Plots were arranged in a split-plot design with weed management systems serving as the main plot factor and seeding rate as the subplot factor with six replications. The largely grass weed community in Plymouth, North Carolina, did not show a significant response to soybean seeding rate in the organically managed plots. The pigweed dominated community in Goldsboro, North Carolina, however, showed a marked response. Pigweed densities decreased linearly with increased seeding rate from a high of 4.0 end-of-season plants m -2 to a low of 1.3 plants m -2 . A second experiment combined stale seed bedding, accomplished with pre-plant passes of a rotary hoe, with post-plant use of a rotary hoe. The plots were arranged in a split-block design with six replications. Three levels of stale seed beds were implemented: four weeks, two weeks and zero weeks of pre-plant cultivation. Five levels of blind cultivation were used: zero, one, two, three and four passes with a rotary hoe after planting. In all treatments, rotary hoe frequency was approximately once every 5 days. Post-plant rotary hoe use was far more effective in reducing weed populations at both locations than pre-plant passes. No detectable differences among pre-plant treatments were present at Goldsboro. Post-plant cultivation frequency was inversely related to percent weed cover, ranging from a high of 30% to a low of 13%. In Plymouth, the pattern was similar with a high of 53% cover to a low of 2.9% cover. Preplant cultivations had an appreciable impact in Plymouth when no post-plant cultivations were used, but were considerably less effective than a single pass of the rotary hoe after planting. While increasing the number of cultivation passes resulted in better weed control, returns on investment decreased rapidly. Overall, increased seeding rates and multiple passes with a rotary hoe after planting exhibited the highest returns to farmers. 27
Page 1 and 2: 1 Proceedings of the Sixty-first An
Page 3 and 4: 3 NORTHEASTERN WEED SCIENCE SOCIETY
Page 5 and 6: 5 SECTION CHAIRS Agronomy Chair: J.
Page 7 and 8: 7 CARFENTRAZONE AND QUINCLORAC FOR
Page 9 and 10: 9 THE EFFICACY AND CROP TOLERANCE O
Page 11 and 12: 11 EVALUATION OF HERBICIDES FOR CON
Page 13 and 14: 13 BEING HEARD BY THE IR-4 PROJECT.
Page 15 and 16: 15 ABSTRACTS FROM THE 7 TH CONFEREN
Page 17: 17 HERBICIDE NAMES: COMMON, TRADE,
Page 20 and 21: 20 INTEGRATING WEED CONTROL STRATEG
Page 22 and 23: 22 GIANT HOGWEED ERADICATION IN PEN
Page 24 and 25: 24 EFFECTS OF EMERGENCE PERIODICITY
Page 26 and 27: 26 PRODUCER AND PRODUCTION IMPACTS
Page 28 and 29: 28 A SIMPLE METHOD FOR CLEANING TUF
Page 30 and 31: 30 EMERGENCE AND PERFORMANCE OF TWO
Page 32 and 33: 32 CARFENTRAZONE AND QUINCLORAC FOR
Page 34 and 35: 34 2006 NEWSS SUMMER WEED CONTEST R
Page 36 and 37: 36 INVASIVE AQUATIC WEEDS IN NORTH
Page 38 and 39: 38 AMMONIUM PELARGONATE AS A BIOHER
Page 40 and 41: 40 TRINEXAPAC-ETHYL INFLUENCES EFFI
Page 42 and 43: 42 Table 1. Insect feeding damage,
Page 46 and 47: 46 ROTARY HOE EFFICACY IN CORN: INF
Page 48 and 49: 48 ALFALFA/GRASS FORAGE MIXTURES US
Page 50 and 51: 50 CONTROL OF NEW WEED SPECIES IN T
Page 52 and 53: 52 Table 1. Results of 2006 contain
Page 54 and 55: 54 TOLERANCES OF ORNAMENTAL SHRUBS
Page 56 and 57: 56 2006 WEED MANAGEMENT TRIALS IN C
Page 58 and 59: 58 THE RESPONSE OF FIELD AND CONTAI
Page 60 and 61: 60 THE EFFICACY AND CROP TOLERANCE
Page 62 and 63: 62 Table 2. Plant quality ratings o
Page 64 and 65: 64 EVALUATION OF PROLINE-LINKED PEN
Page 66 and 67: 66 ANNUAL BLUEGRASS AND DOLLAR SPOT
Page 68 and 69: 68 Table 1. Autumn 2005 versus spri
Page 70 and 71: 70 A PRELIMINARY STUDY OF THE NON-N
Page 72 and 73: 72 native species, covering and smo
Page 74 and 75: 74 EFFECTS OF BUCKWHEAT RESIDUE ON
Page 76 and 77: 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
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98 SEEDHEAD SUPPRESSION OF ANNUAL B
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100 ROUGHSTALK BLUEGRASS CONTROL WI
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102 EFFECT OF DEW AND GRANULAR FORM
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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
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110 PUMPKIN RESPONSE TO HALOSUFSULF
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112 Figure 1. Grass cover following
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114 CHEMICAL CONTROL OF APPLE ROOT
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116 STRAWBERRY PLANTING YEAR WEED C
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118 WEED CONTROL IN NO-TILL PUMPKIN
Page 120 and 121:
120 NATURAL PRODUCT POTENTIAL FOR W
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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 128 and 129:
128 APPLICATIONS FOR SULFENTRAZONE
Page 130 and 131:
130 HORSEWEED: FROM OBSCURITY TO TH
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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
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160 meeting attendance numbers have
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162 members or to members of the Ex
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164 primary areas that had increase
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166 1 st place: Evaluation of Kentu
Page 168 and 169:
168 d) Resolutions Committee Appoin
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170 2005, Hilary Sandler and Brent
Page 172 and 173:
172 (Ornamentals), Rakesh Chandran
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174 Total Expenses $38,227.24 Total
Page 176 and 177:
176 PUBLIC RELATIONS Brent Lackey A
Page 178 and 179:
178 • 2 nd place team: Guelph tea
Page 180 and 181:
180 WSSA REPRESENTATIVE Jeffrey Der
Page 182 and 183:
182 b. Legislative Visits training
Page 184 and 185:
184 b. Selection of a WSSA Member f
Page 186 and 187:
186 WSSA Provides Comments to the C
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188 $179 million, in contrast to a
Page 190 and 191:
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
Page 196 and 197:
196 1991 1 Elizabeth Maynard Cornel
Page 198 and 199:
198 COLLEGIATE WEED CONTEST WINNERS
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200 1996 - Penn State Agronomy Farm
Page 202 and 203:
202 RESEARCH POSTER AWARDS 1983 1.
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204 1998 1. Weed Control Studies wi
Page 206 and 207:
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
Page 212 and 213:
212 1985 1. Peach Response to Sever
Page 214 and 215:
214 Chris Benedict Cornell Universi
Page 216 and 217:
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
Page 222 and 223:
222 Thomas Molloy University of Mai
Page 224 and 225:
224 John Roy RWC, Inc. PO Box 876 2
Page 226 and 227:
226 John R. Teasdale USDA-ARS Build
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228 HERBICIDE NAMES: COMMON, TRADE,
Page 230 and 231:
230 Common Name Trade Name Chemical
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
238 COMMON PRE-PACKAGED HERBICIDES
Page 240 and 241:
240 Trade Name Resolve SG Rhino Rou
Page 242 and 243:
242 COMMON AND CHEMICAL NAMES OF HE
Page 244 and 245:
244 Heck, G.R., 114 Henry, G.M., 15
Page 246 and 247:
246 MAIN SUBJECT INDEX (Herbicides,
Page 248 and 249:
248 glyphosate, 29, 38, 39, 57, 70,
Page 250:
250 shepherd's purse, 56 s-metolach
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