Vol. 51â1997 - NorthEastern Weed Science Society

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48 EVALUATIONS OF ISOXAFLUTOLEAS A POSTEMERGENCE HERBICIDE IN TURF R. B. Taylorson- ABSTRACf Fie d experiments were conducted during 1995 and 1996 to evaluate control of crabgrass (Di it ri ischaemum (Schreb.) Muhl.), broadleaf weeds and turfgrass tolerance to isoxafl tole (R-P EXP 31130A). Studies were conducted at the URI turf research farm on a mixed urf containing about 70 percent Jamestown II Chewings fescue (Festuca rubra var. comm tata) maintained at 1.25 inches. Additional studies were conducted on an old athletic field tu of Kentucky bluegrass (Poa pratensis L.) mowed at 1.75 inches. Experiments were rando ized complete block designs with four replicates. Plots were five feet wide by eight feet 10 g with a two foot untreated strip between plots. Soils were Bridgehampton silt loams, Treatm nts were applied with a backpack sprayer in 40 GPA. All rates are given in lb ai/A. Cr grass was treated at the early- and mid-postemergence stage. Broadleaf weeds were treated on June 9 and July 5, 1996. <strong>Weed</strong> stands were moderate-heavy in all cases. Broadl af weeds consisted mainly of white clover (Trifolium repens L.) and dandelion Tarax cum officinale Weber). <strong>Weed</strong> control ratings were on a scale of 0-10 with 10 being perfect control and
I" i 49 j PFMERGENCE CONTROL OF PROSTRATE KNOTWEED , J. C. Neall ABSTRACT Prostrate kno eed (Polygonum aviculare L. NPOLAV) is a common weed in turfgrass thinned due to compactio , traffic, athletic use or pest damage. It is difficult to control postemergently with available herbici and is best controlled preemergently. Although, commonly associated with hot, drought-pronesi , prostrate knotweed germinates very early in the spring - typically before preemergent herb cides are applied. In my previous research, many preemergent herbicides labeled for prostrate kno eed control failed to provide adequate control in golf course fairway turf when applied in early s ring. In this study, we investigated the effectiveness of late fan applications of labeled herbicide as compared to spring treatments for preemergence control of prostrate knotweed. Herbicides w re applied on November 30, 1995 or April 12, 1996 to a predominantly Poaonnua and perennial rye rass (Lolium perenne) golf course fairway mowed at th inch. November applications were about 7 weeks after the last mowing for theseason. April treatments were only 2 days after snow c er had melted from the plots but prostrate knotweed seedhad already germinated; most of thegermi ated seed were on thesoil surface and the primary roots had not yet penetrated the soil surface. The soil surface and 2 inch depth temperatures at the time of thespring treatments were 53 F and 45 F, pectively. The herbicides applied included prodiamine (Barricade) at 0.75 and 1.1 Ib ail A, isoxaben (Gallery) at 0.75 and 1.0 Ib ailA, and pendimethalin (pre-M) at 1.5 Ib ailA. Late fall appl cations of each herbicide controlled prostrate knotweed better than spring treatments. Late all-applied prodiamine controlled 50 and 83 % of the prostrate knotweed at 0.75 and 1.1 IblA, res tively; spring applications provided only 33% and 43 % control. Similarly, late faU application 0 pendimethalin controlled prostrate knotweed 98% but only S5% with spring treatment. Iso n provided complete control at 0.75 IblA with fall applications but no control with the spring tments. In a separate tudy, the effects of late fan preemergent herbicide applications on spring overseeding was valuated. In that test, prodiamine and isoxaben were applied on November 30, 1995 at the same tes as in theprostrate knotweed study. The area was treated with Roundup on May 1 and slit s ed with perennial ryegrass on May 9, 1996. Plots were rated once a month. Prodiamine redu turfgrass cover ~~ by 70% in July ratings. By theend of August turfgrass had partially recover with only 20 to 33 % reduction in cover from 0.75 and 1.1 lb ailA, respectively. In contrast, isoxa n caused no stand reduction in June or August ratings. In July ratings, a slight (18%) reduction as observed with 1.0 Ib/A isoxaben. In August 1996 ratings, other weeds from seed controlled b * November applications of isoxaben at 0.7S IblA included creeping woodsorrel, (Oxalis comicu ll), broadleaf plantain (Plantago major) and white clover (Trifolium repens) from seed. These data s wed that several herbicides were effectively controlled prostrate knotweed when applied in late fal , including prodiamine, pendimethalin and isoxaben. But only isoxaben did so without iDlederir with springoverseeding, ---1--- 'Assoc. Prof.1Dept. of Horticultural Sci., N.C. State Univ., Raleigh, NC 27695
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 and 8: 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: I POTENTIAL I I 47 USE OF EXP-31130
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 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
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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.,
Page 188 and 189:
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