Vol. 51â1997 - NorthEastern Weed Science Society

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8 Table 1. Di ferences between ratings of percent green cover on chewings, hard, and creeping red fes ues taken prior to application on October 23, 1995~ and when rated on May 22 and July 6, 1996. Differences in % Green Coverl/ Rate Chewings Hard Creeping Red Chemical (lbs/A) 5/22 7/9 5/22 7/9 5/22 7/9 Control lOa 13a 23a 33 a 22 a 27 a Clethodim 0.25 lOa 23a 3 b 26 a o ab 13a Clethodim 0.25 -3 a lOa -8 be 17 ab -5 ab 10 ab +NIS (0.2 5 v) Clethodim 0.25 -30 b -15 ab -23 c 20 a -12 b 5 ab + cae (1. ) Clethodim 1.0 -68 c o ab -53 d 6 ab -53 c 8 ab Clethodim 1.0 -63 c -7 ab -62 d -28 c -58 c 4 ab + NIS (0.2 %) Clethodim 1.0 -86 c -33 b -65 d -15 be -75 c -18 b -coc (1.0 v) 11 Means w thin columns, followed by the same letter, do not differ at the 5% level of significance (DMRT). Table 2. P rcent green cover in chewings, hard, and creeping red fescues treated on May 31 and e aluated on July 9, 1996. Rate % Green Cover11 -=--:---=---; (lblA) Chewings Hard Creeping Red 90a 95 a 93a 0.25 70 a 85 ab 83 b 0.5 40b 75 abe 67 c 1.0 38 b 55 c 60 cd 0.25 73a 78 abe 80 b 0.5 72 a 62 bc 62 cd hodim 1.0 30 b 30 d 58 d OC (1.0%) 11 Means ithin columns, followed by the same letter, do not differ at the 5% level of significance (DMRT).
9 I CONTROLLING QUACKGRASS WITH CLEfHODIM Larry J. Kuhns and Tracey L. Harpster" ABSTRACT I The objective of this study was to determine the optimum conditions under which to apply clethodim to achieve control of quackgrass (Elytrigia repens (L.) Nevski). Clethodim was applied at 0.125 or 0.18811j>/ain the morning and evening, with or without ammonium sulfate. Clethodim was applied in cOrrl.binationwith sethoxydim, each at O.094lb/a, in the morning and evening. Sethoxydim was applied alone at O.I88lb/a in the morning and evening for comparison. All treatments includ~croP oil concentrate at 1% vlv, They were applied to a mix of perennial grasses including uackgrass on May 20, 1996. The quackgrass was 10-18 inches tall. A randomized compf te block design with four replications was established. Treatments were applied with a CO2 powered test plot sprayer with an 8004E nozzle, at 30 psi, in 45 GPA. Morning applicaticns were made between 9:00 and 10:00 AM; evening applications between 8:00 and 8:30 PM. Percent quackgrass stand reduction was rated on July 8 and August 23. By July 8, ~Il of the treatments had caused a significant reduction in the amount of quackgrass (Table 11). However, no consistent differences occurred between any of the variables. When the average ~f all AM treatments were compared to PM treatments, there were no differences. The only distinctive difference was sethoxydim applied in the PM was more effective than when apPliedJ' n the AM. The addition of ammonium sulfate caused faster decline of the quackgrass, but di not result in increased stand reduction. The combination of low rates of clethodim and sethoxydim was as effective as any other treatment By August 123, the quackgrass had regrown and there was no difference between any of the treatments and the control. These treatments should have been applied several weeks earlier when the quackgrass wassmaller, and a repeat application would be necessary for more thorough control. i I I I I I I I I I I I 1 Prof. of Omamentalj Horticulture and Research Associate, Dept. of Horticulture, The Pennsylvania State University, University Park, PA 16802
Page 1 and 2: 1 DE~LOPING BEST MANAGEMENT PRACTIC
Page 3 and 4: 3 MATERIALSANDMETHODS Experiments w
Page 5 and 6: I 5 I Table 3. Stand density of oat
Page 7: 7 TaL~NCEaFHNE~CU~TaCL~HarnM Larry
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
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59 HERBICIDE TRATEGIES FOR CONTROL
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61 Table 1.Eff ct of WeedControlTre
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63 DETECTION ND MOVEMENT PATTERN OF
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65 TRAILERING AFETY: A TRAINING COU
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67 EV ALUATIO OF WIT..DFLOWER ESTAB
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69 LlNGSNOW ECOSYSTEM PROJECT: MICR
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71 TABLE 1: Tree . jury provided by
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74 GSNOW ECOSYSTEM PROJECT: WHITE S
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16 cherry (Pnmus se otina ranks fou
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.J 78 Table 1. Density, (D), relati
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~---------_._-~---_.._--- 80 A NEW
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82 WEED AFFINITY GROUPS AS A TOOL I
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84 NEW TE HNIQUE TO COMPARE EFFICAC
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86 PRO UCTION PERFORMANCE OF GLYPHO
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88 Managing nterseeded Cover Crops
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-----------t----~--- 90 Since weed
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92 The mechanistic model (equ. I) a
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94 Exploring the Feasibility of Pro
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96 INHIBI ING THE DEVELOPMENT OF CI
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98 However it .ncreased the control
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100 LIVERWORT AND PEARLWORT MANAGEM
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102 ULFENTRAZONEAND HALOSULFURON:HE
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104 estern New York Nursery IPM Pro
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106 C MMONRAGWEEDCONTROLIN FIELD CO
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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. 51â1997 - NorthEastern Weed Science Society

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Vol. 51â1997 - NorthEastern Weed Science Society