Vol. 51â1997 - NorthEastern Weed Science Society

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~---------_._-~---_.._--- 80 A NEW BROADSPECTRUMHERBICIDEFOR SPECIALTYCROPS JRC. Leavitt,D. Ganske,C. Morton, D. Delaney,M. Link, S. Rick' ABSTRACT nidin(DPX-R6447)herbiciderepresentsa new familyof chemistryto be used for weed con 01in apples (MalusdomesticaBorkh.), stone fruits (prunus spp.), and other specialty crops. It' an highlyeffectiveherbicidecharacterizedby low use rates. Preliminarytoxicology studiesin icatethis herbicidehas low acute oral and dermaltoxicity. Apples,establishedstone fruits, and other specialtycrops have demonstratedexcellenttoleranceto azafenidinwhenused for preem rgence or postemergenceweed control. Studiesto date indicateno phytotoxicityor maturity laysresultingfromthe use of this herbicide. Preemergenceapplicationsofazafenidin, or postem rgence applicationstank mixedwith glyphosateor paraquat, haveresulted in controlof manypro lemweeds including: commonlambsquarters(ChenopodiumalbumL.), redroot pigweed anthusretrotlexus L.), groundsel(SeneciovulgarisL.), QueenAnne's lace maucus c ota L.), Pennsylvaniaand ladysthumbsmartweed(polygonumpensylvanicumand~. persicaria ), red sorrel (Rumexacetosella.L.),commonragweed (AmbrosiaartemisiifoliaL), common ickweed(StellariamediaL.), giant foxtail(SetariafaberiHem), barnyardgrass (Echinoc oa crus-galli(L.) Beauv.), large crabgrass(Digitariasanguinalis(L.) Scop.), and yellow nutsedge C rus esculentusL.). IB.I. DuP nt de Nemours and Co., Inc., Wilmington,DE 19808
81 COMPARSON OF ATRAZINEANDPROSULFURONCOMBINATIONSWITH PREEMERGENCEHERBICIDES IN SWEETCORN Frank J. Himmelstein, Robert J. Durgy 1 ABSTRACT A stud was initiated for fresh market sweet corn (Zea mays saccharata .) to determine optimum reduced rate combinations of standard la eled herbicides and to evaluate unlabeled and recently la eled herbicides as alternatives to the standards. A 1996 field rial conducted on the Plant <strong>Science</strong> Research Farm in Storrs, ct valuated four preemergence herbicides applied alone and in co 'nation with atrazine applied preemergence or prosulfuron (Peak) applied postemergence. The study was a split plot desig with three replications. The main plots were atrazine applied at 1.0 lb ai/A, prosulfuron applied at 0.036 lb ai/A, and the preeme ence herbicide (PRE) treatments applied alone. The sub-plot t atments and applied rates were: metolachlor[(Dual II) 2 and 2.5 ai/A],dimethenamid [(Frontier) 0.94 and 1.17 lb ai/ A], alachl [(Lasso MT) 2 and 2.5 lb ai/A], and pendimethalin [(Prowl) a 1.25 and 1.5 lb ai/A]. Sweet corn "D'Artagnan" was planted on ~ne 12. Preemergence treatments were applied on June 13. Prosul ron was applied on July 11, when the sweet corn was at the 8-9 leaf stage, 25-40 cm in height. Herbicides were applied wi a CO 2 backpack sprayer delivering 20 gpa at 32 psi. <strong>Weed</strong> contr 1 was assessed by visual ratings, and weed biomass samples ta en from a 2.25 ft 2 quadrat from the center of each plot. The ominant weed species were common lambsquarters (Cheno odi m album L.), common ragweed (Ambrosia artemisiifolia L.), redro t pigweed (Amaranthus retroflexus L.), and large crabgrass Digitaria sanguinalis (L.) Scop.] The atrazine and prosulfuro treatments gave greater control of redroot pigweed and common lambs quarter compared to the PRE treatments. Common ragweed co trol was 100% for the prosulfuron treatments. There were no di ferences in common ragweed control between the atrazine a d PRE treatments. Large crabgrass control was similar among the ain treatment effects. Alachlor gave 100% control of redroot pi eed although pigweed biomass was similar between herbicide reatments. Pendimethalin gave greater lambsquarters control co pared to the other herbicides. All herbicide treatments gave similar control of large crabgrass and common ragweed. W ed control was similar between the low and high herbicide ates for all weed species. A single harvest of all ears from wo 10 foot center rows indicated the sweet corn yield from the p osulfuron plots were reduced 20% compared to the atrazine a d PRE treatments. There were no differences in sweet corn yield among the SUb-plot treatments or application rates. Culls were not determined for each plot. A random sampling of sweet corn ears indicated the yield reduction attributed to the prosulfuro treatments was more likely due to delayed maturity rather tha actual kernel loss. Further studies will be needed. Extens10n Educator-Integrated Crop Management, and Res. Asst., respective y, University of connecticut, storrs, CT 06269
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1 DE~LOPING BEST MANAGEMENT PRACTIC
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3 MATERIALSANDMETHODS Experiments w
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I 5 I Table 3. Stand density of oat
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7 TaL~NCEaFHNE~CU~TaCL~HarnM Larry
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9 I CONTROLLING QUACKGRASS WITH CLE
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BELTSV~LLE 11 SUSTAINABLEAGRICULTUR
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Ii 13 I The 1996NEWSSCollegiateWeed
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15 EFFECTOF rREPLANT TILLAGEANDNICO
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17 i PENNMUjLCH, A NEW MULCH FOR TU
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19 cover the sta~es in the Northeas
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21 I TABLEt CORN WEED CONTROL EFFIC
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23 COMMON LAMBSQUARTERS CONTROL IN
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I I 25 I Table 2. Effectivaness of
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27 PERFORMANCE OF PREEMERGENCE TREA
Page 29 and 30: I i I i I I 29 EFFECT OF TANK-MIXIN
Page 31 and 32: I 31 I EVALVATIONOF WEED CONTROLA
Page 33 and 34: I I i 33 I EFFECT$ OF EXP 31130A AN
Page 35 and 36: 35 Effect OfPO~T ApplicationTimingo
Page 37 and 38: II I ! I ! Ii I I 37 PREE~ERGENCE C
Page 39 and 40: I 39 U+ OF SLUDGE BASED FERTILIZERS
Page 41 and 42: i I 41 I EFFECT OF fSOXABEN APPLIED
Page 43 and 44: I 43 ~STCRABGRASS CONTROL AS lWO os
Page 45 and 46: I II 45 iI Gallery* f,r Weed Preven
Page 47 and 48: I POTENTIAL I I 47 USE OF EXP-31130
Page 49 and 50: I" i 49 j PFMERGENCE CONTROL OF PRO
Page 51 and 52: 51 TIIE E...·rL"",,- L OF TRINEXAP
Page 53 and 54: 53 PERF011MANICEOF ISOXAFLUTOLE IN
Page 55 and 56: 55 ISOXAFL OLE COMBINATIONSWITH PRE
Page 57 and 58: 57 Weed Interference in Full Season
Page 59 and 60: 59 HERBICIDE TRATEGIES FOR CONTROL
Page 61 and 62: 61 Table 1.Eff ct of WeedControlTre
Page 63 and 64: 63 DETECTION ND MOVEMENT PATTERN OF
Page 65 and 66: 65 TRAILERING AFETY: A TRAINING COU
Page 67 and 68: 67 EV ALUATIO OF WIT..DFLOWER ESTAB
Page 69 and 70: 69 LlNGSNOW ECOSYSTEM PROJECT: MICR
Page 71 and 72: 71 TABLE 1: Tree . jury provided by
Page 74 and 75: 74 GSNOW ECOSYSTEM PROJECT: WHITE S
Page 76 and 77: 16 cherry (Pnmus se otina ranks fou
Page 78 and 79: .J 78 Table 1. Density, (D), relati
Page 82 and 83: 82 WEED AFFINITY GROUPS AS A TOOL I
Page 84 and 85: 84 NEW TE HNIQUE TO COMPARE EFFICAC
Page 86 and 87: 86 PRO UCTION PERFORMANCE OF GLYPHO
Page 88 and 89: 88 Managing nterseeded Cover Crops
Page 90 and 91: -----------t----~--- 90 Since weed
Page 92 and 93: 92 The mechanistic model (equ. I) a
Page 94 and 95: 94 Exploring the Feasibility of Pro
Page 96 and 97: 96 INHIBI ING THE DEVELOPMENT OF CI
Page 98 and 99: 98 However it .ncreased the control
Page 100 and 101: 100 LIVERWORT AND PEARLWORT MANAGEM
Page 102 and 103: 102 ULFENTRAZONEAND HALOSULFURON:HE
Page 104 and 105: 104 estern New York Nursery IPM Pro
Page 106 and 107: 106 C MMONRAGWEEDCONTROLIN FIELD CO
Page 108 and 109: 108 CGA-77102: A New Herbicide for
Page 110 and 111: 110 POSTEMERGENCEWEEDCONTROLIN SOYB
Page 112 and 113: 112 E FECTS OF REPEATEDLATE-WINTERH
Page 114 and 115: 114 GSNOW ECOSYSTEl\1 PROJECT: NITR
Page 116 and 117: 116 RESULTS AND DISCUSSION GI fosin
Page 118 and 119: ---------T---~~-- 118 EVALUA ON OF
Page 120 and 121: 120 B USB CONTROL PROVIDED BY LOW V
Page 122 and 123: ------- 122 W VOLUMEWEED AND BRUSH
Page 124 and 125: 124 EVA UATION OFGLYPHOSATEFOR DORM
Page 126 and 127: 126 E ALUATION OF IMAZAMETH FOR WEE
Page 128 and 129: 128 Presidential Address Delivered
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130 Ho much land can ten billion pe
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Waggone December 24, 1994 132 count
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Waggone December 24, 1994 134 25 Pa
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Waggone December 24, 1994 136 which
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December 24, 1994 138 sets the pecu
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----------+---- Waggone December 24
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Waggone December 24, 1994 142 soil
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Waggone December 24, 1994 144 ~oo~
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Waggoner December 24, 1994 146 350
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148 Appendix Calculate the environm
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150 alone ac eptably controls typic
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152 opportu ity to use sethoxydim a
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---------+----------- 154 IMPACT OF
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156 The STS® time line: • 1986 -
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-------_. __ ._._--- d •••..
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-----_._~-_._.__.- 160 SYNCBRONYTM.
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162 Government approvals for Roundu
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HH i ! 164 AG6101 l.oundup Ready®
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166 n Lib rty LinkTM soybeans will
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168 IMITMCORN YIELD PERFORMANCE* (H
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170 to $15 an ere depending upon ho
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172 e recent occurrence has been th
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174 He bicide was added to the tiss
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176 it can at ti es be a weed in Ke
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178 ty's main campus that Rhizocton
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180 weight conclu qualit treatm and
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182 during the st or 2nd growing se
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184 TABLE 1. Mean raspberry cover (
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186 (A) STEM VOLUME - SPRING TRTM.,
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188 concluded at 5.1 em of simulate
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190 ACKNOWLEDGEMENTS ank United Agr
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192 AGRICULTURE NEEDS MORE WEED SCI
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194 Who is going to provide the edu
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20 18 - 16 A v 14 e r 12 a g 10 e s
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198 50th Annual Business Meeting of
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200 • Graduate team winners were:
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202 solclose to the New Year, as it
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----~------ 204 e Committee Reports
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! I 206 I Administration $1,527.23
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208 Glickman comments that his "hig
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210 York Sta~e. It is still unclear
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I I I Bingham, SamuJ Wayne Virginia
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214 Cianessi, Leonard Nat. Center o
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L I • I I I I Langston, Vemon Dow
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__________ m---+---m__ .... 218 Rie
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-----------~ I I 220 Whalen, Mark Z
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Helicopter Applicators, Inc. Martin
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224 Employers of NEWSS members in 1
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.l I I I I 226 NEWSSPASTPRESIDENTS
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228 AWARD OF MERIT 1971 1972 1973 1
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1995 I I I 230 Fra~cis J. Webb •
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II II 232 1995 1'R~chard Ashly Univ
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234 1991 1992 1993 1994 1995 1996 1
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I, I 236 1989 - AmeriJan Cyanamid,
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--------_.~-------- 238 RESEARCH PO
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1995 1 - iAComparison of Broadleaf
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242 1960 1961 1962 . The Influence
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244 1975 1 - Control of Jimsonweed
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246 1984 1 - Pre-TransplantOxyfluor
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248 Common or Code name trade Name
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250 Common or Code name , rrade Nam
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252 I Common ot Code namel I I flur
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254 Common o~ Code name' I I i Trad
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256 Common or i Code name I Trade N
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258 , Ackley, J.A .• 7 Adams, R.G
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260 1 I 2,4-D 2, 14, 1~, 22, 23,28,
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262 I Agrosticpalus(ris 47, 48 Agro
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SUBJECT INDEX Application T~mings 4
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266 WEED INDEX Abutilon theop~rosti
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Vol. 51â1997 - NorthEastern Weed Science Society

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Vol. 51â1997 - NorthEastern Weed Science Society