Vol. 54â2000 - NorthEastern Weed Science Society

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Table 1 STATISTICAL SUMMARY OF THE VASCULAR FLORA OF BISCAYNE NATIONAL PARK, FLORIDA Fernsand Fernallies Conifers Dicots Monocots Total Families 5 I 70 16 92 Genera 8 1 195 57 278 Species 9 1 276 94 380 Native 8 1 226 63 298 Species Non-Native 1 0 50 31 82 Species 72
EVALUATION OF AZAFENlDIN FOR PREEMERGENCE WEED CONTROL UNDER GUIDERAILS J.M. Johnson, A.E. Gover, and L.J. Kuhns' ABSTRACT A studywas establishedto evaluateazafenidinaloneandin combinationwithother herbicidesforpreemergenceweed controlunderhighwayguiderails. The studywas located along SR 33, near Nazareth, PA. Treatments were applied to 5 by 25 ft plots using a C02 poweredbackpack sprayer equipped with a single Spraying Systems OC-12 spray tip, delivering 40 GPA at 34 psi, on May 6, 1999. Treatments were arranged in a randomized complete block design with three replications. Treatments included an untreated check; 3.2,4.8,6.4, and 8 ovac azafenidinaloneor in combinationwith either2.25 ozlac sulfometuronmethylor 102 ozlac diuron; 2.25 o'Ziacsulfometuronmethylor 102 o'Ziacdiuronaloneandin combination;anda commercial premix of 12.4 ovac imazapyr plus 100 ovac diuron 2J. All treatments except the untreatedcheck included24 oz ae/aeglyphosate" to controlexistingvegetation. Greencover ratings and cover by crownvetch (Coroni//a varia L.) were taken on May 13,7 days after treatment (DAT); June 10,35 DAT; July 7, 62 DAT; August 5, 91 DAT; September 2, 119 DAT; andOctober14. 161 DAT. Predominantweed species werecrownvetch,Canadathistle(Cirsium arvense L.). prostrate spurge (Euphorbia humistrata Engelm), spotted knapweed (Cen/aurea macu/osa Lam.), goldenrod(Solidago spp.),dandelion(Taraxacum officinale Weber),common burdock (Arc/ium minus (Hill) Bernh), dropseed (Sporoboius vaginifiorus Torr.), kochia (Kochia scoparia (L.) Scbrad.), and chicory (Chicorium intybus L.). The baselinerating7 DAT accountedforvegetationpresentat treatment,andshowedthere wereno significantdifferencesamongthetreatmentsat the initiationof the study,with average greencover ratingsbetween 30 and55 percent. At the otherratingdates,from35 DATto 161 DAT, all treatments had significantly less weed cover thanthe untreated check. By 161 DAT, 4.8 ozlac azafenidin, 2.25 oziac sulfometuronmethyl,andazafenidinat either3.2 or 4.8 plus diuronat 102 o'Zlachada significantlyhigherpercentageof weeds thanthebest treatments. Althoughtherewere no statisticaldifferencesamongmost of the treatmentsafterthe 7 OAT rating,by 161 DAT thereweretrends. At all ratesof application,azafenidin aloneprovided controlcomparableto azafenidin plus diuron. Addingsulfometuronmethylto all ratesof azafenidin providedless weed coverthanazafenidinalone. Thosetreatmentscontaining azafenidinplus sulfometuronmethylhad4 percentor less greencoverby weeds even 161 OAT. Similar studies performed in 1997 and 1998 also suggest that azafenidin plus sulfometuron methylprovidesexcellent long tenn weed control. Azafenidinwould serve as a suitable replacementfordiuronin the standard2.25 o71acsulfometuronmethylplus 102 ozlac diuronmix usedin this experiment. 11ProjectAssociate, ProjectAssociate, and Professorof OrnamentalHorticulture,respectively,The Pennsylvania StateUniversity,UniversityPark,PA. 2J Sahara,7.78% imazapyrplus 62.22%diuron,AmericanCyanamidCompany,Parsippany,NJ. 3/ RoundupPro, isopropylaminesalt of glyphosate, 3 Ibaelgallon, MonsantoCompany,St. Louis, MO. 73
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WEED REMOVAL TIMING WITH ROUNDUP RE
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EFFECT OF HERBICIDE RATES AND IRRIG
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40 Effect of Pronone Applied with A
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Comparisonof Sulfosateand Glyphosat
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N 1175 feet Roundup Ready Studies R
Page 11 and 12:
VIRGINIA TECH'S ONLINE WEED IDENTIF
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WEED CONTROL AND YIELD OF CUT FLOWE
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Table I. Effect of napropamide and
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The Effect of Total Postemergence H
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with commercial fertilizer. In gene
Page 21 and 22: HERBICIDE APPLICATIONS VERSUS HANDW
Page 23 and 24: exceeded 4. The success of training
Page 25 and 26: _u ____ Table2: Estimatesof herbace
Page 27 and 28: DOUBLE CROP CORN WEED CONTROL IN VI
Page 29 and 30: ANNUAL WEED AND GRASS CONTROL IN CO
Page 31 and 32: MANAGING QUACKGRASSINFESTATIONSAS C
Page 33 and 34: USING HERBICIDE RESISTANT HYBRIDS T
Page 35 and 36: NICOSULFURONIRIMSULFURON COMBINATIO
Page 37 and 38: GLYPHOSATE ALONE AND PRECEDED BY PR
Page 39 and 40: ROUNDUPVS. LIBERTY:WHATHAVE WE LEAR
Page 41 and 42: In summary, application timing for
Page 43 and 44: INFLUENCE OF TIMING ON WEED MANAGEM
Page 45 and 46: IMPACT OF GLYPHOSATE TIMING AND COR
Page 47 and 48: PREEMERGENCE HERBICIDES INFLUENCE W
Page 49 and 50: COMPARISON OF WEED CONTROL SYSTEMS
Page 51 and 52: Table I Mean Percent Weed Control V
Page 53 and 54: SMALL GRAIN WEED CONTROL - NEW WEED
Page 55 and 56: MODE OF ACTION, ABSORPTION, TRANSLO
Page 57 and 58: INFLUENCE OF CROWNVETCH WITH AND WI
Page 59 and 60: lRUMPETCREEPER, HONEYVINEMILKWEED,A
Page 61 and 62: FLUFENACET PLUS METRIBUZIN PLUS ATR
Page 63 and 64: CONTROLLING ASTERACEAE WEEDS WITH R
Page 65 and 66: 0... Figure1. GerminationRateof Roo
Page 67 and 68: BIOLOGICALLY BASED WEED CONTROL STR
Page 69 and 70: NON·NATIVE VASCULAR FLORA OF BISCA
Page 71: principally in ruderal sites. lawns
Page 75 and 76: AUTOMATING MONITORING OF ROADSIDE W
Page 77 and 78: Table I: Swnmary of brush managemen
Page 79 and 80: Table I: Sequence codes and general
Page 81 and 82: IR-4 ORNAMENTAL RESEARCH PROGRESS F
Page 83 and 84: personnel with many of the illegal
Page 85 and 86: TOLERANCE OF ORNAMENTAL GROUNDCOVER
Page 87 and 88: MUGWORT CONTROL WITH CLOPYRALID AND
Page 89 and 90: POTENTIAL WEEDINESS OF SEVERAL NEW
Page 91 and 92: Table I: Identification, morphologi
Page 93 and 94: Trifolium tricolor 232 26 62 0 18 S
Page 95 and 96: NUTRIENT REMOVAL BY WEEDS IN CONTAI
Page 97 and 98: CONTROL OF POAANNUA FROM MULTIPLE S
Page 99 and 100: ANNUAL BLUEGRASS (PDaannual CONTROL
Page 101 and 102: LATERAL DEVELOPMENT OF PLANT oaowra
Page 103 and 104: RE-ROOTING OF FOUR VARIETIES OF CRE
Page 105 and 106: Table 2. Top growth weights (fresh)
Page 107 and 108: CONTROL OF DALLISGRASS IN COOL SEAS
Page 109 and 110: Kentucky bluegrass was rated to hav
Page 111 and 112: Table 2. Fresh weight (grams) barve
Page 113 and 114: MANAGING FENOXAPROP RESIST ANT CRAB
Page 115 and 116: ADVANCED FORMULATION TECHNOLOGY FOR
Page 117 and 118: Table I. Preemergence smooth crabgr
Page 119 and 120: 0.57EW at O.l21bs ai/A plus Confron
Page 121 and 122: EFFICACY OF DITHIOPYR FORMULATIONS
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EFFECTS OF DROUGHT ON THE INTERFERE
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WEED MANAGEMENT WITH HALOSULFURON I
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WEED CONTROL IN SWEET CORN WITH CAR
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COMPARISON OF USING LEAF AREA AND W
Page 131 and 132:
RESULTS OF NEW YORK VINEYARD TRIALS
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HERBICIDE TOLERANCE IN CRANBERRIES
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Classification based on action on a
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EFFECTS OF SEVERAL POTENTIALLY USEF
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Supplement of the 53 rd Annual Meet
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with society activities to anyone.
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WINTER SQUASH CULTIVARS DIFFER IN R
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INCORPORATING QUINCLORAC IN AUTUMN
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Control efforts aim to eradicate bo
Page 149 and 150:
Table I Weed canopy, insect and dis
Page 151 and 152:
Table 1: Percent mortality of respr
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Vol. 54â2000 - NorthEastern Weed Science Society

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Vol. 54â2000 - NorthEastern Weed Science Society