Vol. 51â1997 - NorthEastern Weed Science Society

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60 CHEMICAL CONTROL OF YELLOW NUTSEDGE: EFFECT ON CORN SILAGE YIELD AND WEED BIOMASS J.M. Jemison,Jr. 1 and MH. Wiedenhoeft 2 ABSTRACT The ntrol of yellownutsedge(CyperusesculentusL) is becominga problemfor corn produ rs in the Northeast. Throughnutletsand rhizomes,nutsedgeis easilyspreadto many fields n tractors and tillageimplements.Whilemanyproducts are registeredfor use on nut e, their effectivenessvariesdependingon the time of applicationand environmental condi ons. Ultra-lowrate herbicidesare availablethat maybe environmentallysaferto use than e more leachableherbicidesused at higherrates. Thesestudieswere designedto assess the re :tiveeffectivenessof differentproducts andtimesof application. The p ominantweeds in this studywere yellownutsedge,mustard,and quackgrass. We ed three control strategies: pre-plantincorporated,preemergence,and post emergence measures. Each treatment containedproduct combinationsdesignedto controlthose •es,and all productswere appliedat recommendedrates. Each treatmentwas with a backpacksprayerat 20 gpa and 30 psi. Weedbiomasswas sampledat canopy closur and silagewasharvestedby hand at maturity. For the preplantincorporatedand preem rgencetreatments,we used metolachlorandatrazine. In the postemergence treat halo ts, we compareddifferentmodes of actionsand timesof application.We compared ron and nicosulfuronappliedearlyand late postemergence(earliestand latesttimes ended). We compareda singleapplicationofbentazon with an applicationofLaddok by bentazonat the recommendedstagesof corn development.Lastly,we also ed nicosuIfuronwith pyridateas anothertotal postemergenceprogram. We had hand and untreated controlplots. , environmentalconditionswere verywet and cool whichinfluencedboth com and e growth and development. Nutsedgebiomassand relativecontrolare presentedin . We foundadequatenutsedgecontrolwith metolachIorand atrazinepre-plant inco rated and appliedpreemergence. ApplyingLaddok earlypostemergencefollowed with a secondapplicationofbentazon also providedgood nutsedgecontrol. The combination ofhat sulfuronand nicosuIfuronappliedearlypostemergenceburnedbackthe nutsedge foliag and controlledother weed speciespresent. Allother combinationsandtimesof appli :tionwere generallyineffective. Highestcornyieldswere foundwith the preplant inco rated treatments. Mixingthe herbicidein the biologicallyactivezonein the soilhelped contr I nutsedge andother weeds early,allowingthe com to get wellestablishedwithless comp .tion. We found statisticallyequivalentsilageyieldswith alltreatmentswhere nutsedge contr I wasover 95% comparedto the untreatedchecks. By waitingto applyherbicidesuntil the was 6 - 8 inchestall,weed competitionwas too great and yieldswere impacted. Condi ionswere extremelyfavorablefor nutsedgedevelopmentin 1996. Nutsedgewas not comp elyeliminatedwith the use of anyof these products or timesof application. By h th r wa vi Ien ed e in all lots. 1 ciateExtensionProfessor- Universityof MaineCooperativeExtension 2 Ass ciateProfessor - Departmentof AppliedEcologyandEnvironmentalSciences
61 Table 1.Eff ct of WeedControlTreatmenton WeedBiomassandCom SilageYields Produ Rate Nutsedge % Control Otberweed % Control Silage biomass Yields ozlac Iblac Iblac tons/ac Contro 2012.6 a 1364.5 15.7a Handw ed 14.7 b 99.3 2 99.9 22.13 b metolachlo and 32/64 50.8 b 97.5 640 53.0 22.29b atrazine - PPI meto1achlo and 32/64 81.5 b 96.0 0.1 99.9 19.17 abe atrazine- Pre Laddok+b :lazon (38/64) + 80.9 b 96.0 51 96.2 18.99 abe 38 1.0/0.66 100.9 b 95.0 0.8 99.0 19.73abe 38/64 1883.6 a 6.4 384.8 71.2 14.25 c halOisuUiJrP 1.0 I 0.66 1190.0 ab 40.9 303.2 77.8 17.66be 8.0 I 0.66 1867.6 a 7.2 70.1 94.8 15.79e Weed biom approximat s was sampled at canopy dosure Iy 8 weeks after planting.
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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
Page 9 and 10: 9 I CONTROLLING QUACKGRASS WITH CLE
Page 11 and 12: BELTSV~LLE 11 SUSTAINABLEAGRICULTUR
Page 13 and 14: Ii 13 I The 1996NEWSSCollegiateWeed
Page 15 and 16: 15 EFFECTOF rREPLANT TILLAGEANDNICO
Page 17 and 18: 17 i PENNMUjLCH, A NEW MULCH FOR TU
Page 19 and 20: 19 cover the sta~es in the Northeas
Page 21 and 22: 21 I TABLEt CORN WEED CONTROL EFFIC
Page 23 and 24: 23 COMMON LAMBSQUARTERS CONTROL IN
Page 25 and 26: I I 25 I Table 2. Effectivaness of
Page 27 and 28: 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: 59 HERBICIDE TRATEGIES FOR CONTROL
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 80 and 81: ~---------_._-~---_.._--- 80 A NEW
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
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110 POSTEMERGENCEWEEDCONTROLIN SOYB
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112 E FECTS OF REPEATEDLATE-WINTERH
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114 GSNOW ECOSYSTEl\1 PROJECT: NITR
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116 RESULTS AND DISCUSSION GI fosin
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---------T---~~-- 118 EVALUA ON OF
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120 B USB CONTROL PROVIDED BY LOW V
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------- 122 W VOLUMEWEED AND BRUSH
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124 EVA UATION OFGLYPHOSATEFOR DORM
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126 E ALUATION OF IMAZAMETH FOR WEE
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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. 51â1997 - NorthEastern Weed Science Society