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

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40 TRINEXAPAC-ETHYL INFLUENCES EFFICACY AND FOLIAR ABSORPTION OF BISPYRIBAC-SODIUM. P. McCullough and S. Hart, Rutgers Univ., New Brunswick, NJ. ABSTRACT Bispyribac-sodium (BS) selectively controls annual bluegrass in cool-season turf but efficacy may be influenced by management practices, such as plant growth regulator (PGR) use. Experiments were conducted in New Jersey to investigate efficacy and absorption of BS applied with a PGR, trinexapac-ethyl (TE), for annual bluegrass control and creeping bentgrass tolerance. In laboratory experiments with annual bluegrass, creeping bentgrass, and perennial ryegrass, tank mixing TE with 14C-BS increased foliar absorption 43% from non-TE treated while absorption quadratically increased with TE rate. Differences in 14C-BS were not detected among emulsifiable concentration (EC), microencapsulated concentration (MC), and wettable powder (WP) TE formulations. In field experiments, two BS applications at 111 g ai/ha reduced annual bluegrass cover 93% from non-BS treated. TE applied before plus tank-mixed with BS averaged 67% greater annual bluegrass control than non-TE treated and reduced creeping bentgrass chlorosis up to 15% from BS alone. Tank mixing EC, MC, or WP TE formulations with BS provided similar annual bluegrass control and creeping bentgrass quality. Applications of BS reduced dollar spot (DS) cover 63% from non-BS treated over both years while TE reduced DS cover 50% from non-TE treated in 2005. Overall, regular TE use appears to have beneficial effects with BS for mitigating creeping bentgrass chlorosis, DS control, and improving efficacy for annual bluegrass by increasing foliar absorption. 22
41 DOES BT CORN BENEFIT FARMERS IN MAINE: A ONE-YEAR, TWO LOCATION EVALUATION. J.M. Jemison, Jr., L. Titus and M. Titus, Univ. of Maine, Orono. ABSTRACT In 1998, the Maine Board of Pesticides Control voted to not accept a petition to allow Bacillus thuringiensis (Bt) corn to be grown in Maine. Reasons for this decision included: 1) no insecticidal spraying was being done for corn borer control in silage corn; 2) concern over Bt resistance issues; and 3) lack of local data to support the need for these hybrids. With renewed interest from dairy producers and new Bt events coming into the market, we evaluated three hybrids (with and without the Bt gene) compared to a silage blend at two locations in Maine to provide growers and state decision makers with information on the cost and benefits of these new lines. One location was a field that had been in continuous corn for over ten years, and the other field had been in corn the previous year, but was regularly rotated with potatoes. Study hybrids included Golden Harvest H6395 and H6466 CB/GT, Monsanto DK440 and DK4442Bt, Pioneer 38H67 and 38H64Bt, and a Pioneer silage blend (37D02). The Pioneer Bt line provided corn borer and cut worm control. The other two lines had corn borer control. No lines selected provided activity against root worms. Data collected included population, cutworm damage, insect damage (stalk, leaf, and tassle), yield, silage quality and mycotoxin levels in silage. Corn was planted at both sites on 31 May 2006. Harvest was taken on 18 September 2006 on the rotated field and 25 September 2006 on the continuous corn field. Insect pressure at both locations was light to moderate. We found significantly higher cutworm (and apparent cutworm) activity in the continuous corn field compared to the field in rotation with potatoes. However, mortality in the most heavily impacted hybrids was less than 2.5 percent of that planted, and this damage did not affect yield. Across locations, there was significantly less insect feeding damage in the leaf or the stalk with the hybrids containing Bt (Table 1). We found leaf miner, northern corn root worm adults, and corn borer insects during our evaluations. There was significantly higher overall insect pressure in the rotated field compared to the continuous corn field. Yields of Bt isolines across locations were not significantly higher that the non Bt isolines. Yields were significantly higher in the rotated corn field likely due to apparently higher fertility. Maturity of the Pioneer and DeKalb hybrids were significantly longer than the Golden Harvest hybrids which likely affected overall corn silage yield and quality. If Bt corn is approved for use in the state, Maine producers should consider lines that are shorter in maturity to match the typical growing season climate. Despite the significantly reduced insect pressure likely caused by the presence of Bt, we did not find silage with significantly reduced levels of vomitoxin. Grain corn growers have typically found yield benefit with Bt lines in years with significant corn borer pressure, but silage corn growers have seen less benefit (Ma and Subedi, 2005). A potential secondary benefit could be improved silage mycotoxin levels (Wu, 2006). However, we found no significant improvement in Bt isoline silage quality. 23
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 42 and 43: 42 Table 1. Insect feeding damage,
Page 44 and 45: 44 WEED CONTROL WITH TOPRAMEZONE PR
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
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90 Table 1. Morrow's honeysuckle (L
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92 EVALUATION OF HERBICIDES FOR CON
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94 EVALUATION OF HERBICIDES FOR CON
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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
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106 YELLOW NUTSEDGE CONTROL WITH SU
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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
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120 NATURAL PRODUCT POTENTIAL FOR W
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122 THE IR-4 PROJECT: UPDATE ON HER
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124 PEDIGREE OF A PESTICIDE. D.R. S
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126 SEEDHEAD SUPPRESSION OF ANNUAL
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128 APPLICATIONS FOR SULFENTRAZONE
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130 HORSEWEED: FROM OBSCURITY TO TH
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132 RECENT FINDINGS ON THE FIELD BE
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134 HORSEWEED RESPONSE TO NO-TILL P
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136 THE MASSACHUSETTS EXAMPLE: ONE
Page 138 and 139:
138 Supplemental NEWSS Abstracts (p
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140 ABSTRACTS AND BIOGRAPHIES FOR P
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142 EVALUATION OF AN HERBICIDE APPL
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144 ALUMINUM TREATMENT FOR PHOSPHOR
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146 BIOLOGICAL CONTROL OF AQUATIC W
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148 THE 2002 FARM BILL AND ITS EFFE
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150 LAND USE PRACTICE IMPACTS ON NO
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152 A NEW STANDARD FOR DEFINING AQU
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154 PORTRAIT OF THE HEALTH STATUS O
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156 TEN YEARS OF VARIABLE WATER MIL
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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
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168 d) Resolutions Committee Appoin
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170 2005, Hilary Sandler and Brent
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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
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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
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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