Vol. 16â1962 - NorthEastern Weed Science Society

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450 OJJJCfIVES A major aim of the toxicolDC!aal~ttudles con4~ br.the Institute during 1961 has been to determine Whether or not the field application to' milfoil of attaclay pellets impregnated with the butoXT_ethanol_ester of 2,4-D causes lethal effects upon species of~ommercial importance that occur in the Chesapeakearea. A second objective was to determine if herbicide residues are present lal tissues' of ·food sp.des held in experi. , mental plots durinc aad after treaUlent. An addit1_1objectivehas beellc the accumulation of"dati. concernliii,~the etfect of treatment on other aquatic aniJilals and plants natlvelto' the treated ar ... ~~ ~ ,.:,X ~ -, '1 ~, This particular f'ormulatiOl1of a,4-Dwas Ielect4citor the study be;.;·':: cause ear11er research .(Beaven,1,601Steenis andStotti., 1961) had' ' demonstrated its etfectiveneu and apparent safet", •• used'for mllfolli control in local tldalareas. '1'" . fl' ;' rl ~ LOCATIONOFUPElUMENTALPLO!l'Sj I ·i.- -"t' \ .' 'fl. Important commercial:fisherits!or the easte·rn-,zofster (Crassostrea rM:inica), the blue crab (CallipHttssapidus )ud.-ahe softshell clam M arenaria) occur in the saltier waters invaded bVmilfoil. For this reason, the primary area selected for st1,1dywall..tb.t1,lower PotomacRiver where these three species occur. Field trips were madein early spring to selectll1llfoll irifestedcreslts:ol" 'coves where onwcll. plots could be laid out. It wasessentia.l that [the.e be well sheUtJ!edand subjected to a minimumof water dispersal from:tlde and wind moveMnt. The three most suitable Potomactributaries meetlng·these specificatloDs were St.Patrlck Creek and 'Wblte Neck Creek on the Ma17landshore amULOwerMachodocCreek on the Virginia slde.In each of ,these, oysters aril:planted~ commercial crabbing and f1shlngarepracticecl taM.'beds of naUte,sottshell clams are present although not exploited commercially. An additional area, Dundee Creek near the head of the Chesapeake, was chosen for observations in fresh to barely brackish tidal water. ' :':; "J. r:,.," In the'potomacexperiments't~l'ee replications 9'l-itreatments were \", madeduring late spring at 3Ellbu:,acid equivalentdt 2.4-D per acre. 60 Ibs. AElAandof'untreated control plots. A single plot treated at th.'~ rate of 120 Ibs. AE/Aand a fourth control plot .werf,lIalaolOCated in this;' area. These provided observations of applications, madeduring the most favorable period for herbicide effectiveness, at double and quadruple the quantity shownby'priorexperiBlen\t,(30 Ibs. AE!A):te,beaufficient for . good contro~. SUbsequentobse~at10's this lear (Slfenls et al 1962) have shownthat over large plots, 20 Iba. :AE/Acan supptijiAlillfollunder proper conditions of application. ;:.;." J\'" : Each one-acre plot was roUBblf"square in shapeJ.-d"contained dense" beds of milfoil. Plots were measured with floatingpolTethylene rope and' corners markedby stakes set firmly in the bottom aDd projecting eight or more feet above the surface. Each plot was designated by a number. Average depth was apprOXimately3 feet with tidal fluctuations of a little
more than 2 feet. ExceptionalUdes several feet ~yond the normal ran~ occasionally occur. ' Nosingle creek in the lower Potomachad suffIciently extensive mil. foil beds to accommodateall ofth~ replicated plots and provide adequate buffer zones betweenthem. Tbethree creeks selected were as nearly alike as possible but had slight differences in salinity-and in other characteristics of minor importance. Since it was moredesirable to replicate measurementsof the differences in 'mortality betw~n groups of animals etposed to zero, 30and f:IJLbs, AFJAof 2,4-D than tOrepl1cate identical! treatments, a complete series of the three treatmen~swas placed in each creek. Hence, plot numbersfor one each of thethfee treatments were chosen separately and at randomfor the individual' .creeks. The site of· 1 the 120 Ibs. AEtAtreatment and'of a control were¢rawnfrom plots near J the mouthof \'lhite NeckCreek. Plots for each typ~f of treatment in the i low salinity habitat of DundeeCreekalso were chal$enat random. " WATERTElJ,FERATURE ANDSALINITY Collection of certain envlronmentaldata begaa·in early spring when the plot sites were se~ected. ~ing the period o~test-animal exposure, the salinity of the MarylandPotomactributariesu~ually varied between 7 and 9 parts per thoulland, whllethat of plots in]he upper portionot the LowerMachodocwas ap~roximatelY two parts lo~r. salinity in Dundee Creek remainedwell under 1 ppt or essentially tr~~h. ThePotomacvalues were about twoppt below the seasonal normal tpr that area. j' . Water temperatures rose irregularly during the study period and generally were below seasonal normal. At the time of.herbicide application in the MarylandPotomactributaries (May29-June I), water temperatures ranged between18.5° and 21.5° C. , During the preceding week, they ran from one to twodegrees higher. Whenthe Machodoc:plotswere treated on June 7, water temperatures were unrecorded'at the time of application but were ranging in the low to mid.twenties as determined from parallel data. During the subsequent period of observation, water temperatures ranging up to 27.5° were recorded in the Potomacplots. In DundeeCreek the water temperature was l6.~o C whenherbicide was' applied on May20 at 5:30 A.M. Higher temperature~ had occurred at this location a tew days earlier and on'May21 the tem~ature was 18.5°. No further temperature readings"were taken in the'to%\cological study plots' at this location. " HOLDING QFExpERIMENTAL ANIMALS In each treatment plot, cages of experi~ental animals were placed near the center, about 10 ft. outside the plot boundaryand at a point about 200 ft. outside the plot. Oncontrol plots, animals were held near the center. Limitations of time and personnel did not permit replication of cages at each holding site. 4.51
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PRESENTANDFUTtJU OF AQUATIC'. WIlD
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Complete reports from 12 Nor~heaste
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The reawakening in aquatic weed con
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,10.1ng -2,4.,;iD (19), 2,4~5.T (4)
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9 The Role of the State in Res idue
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,., 1'4 keep developmental work in
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In addition to a review of field an
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State workers have to consider resi
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The vigorous regrowth of quackgrass
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during t,he sUllllller.is l,ower ll
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5. llslapon and other chlorine,ted
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23 • ·i INTRODUCTION: !!'he Bear
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Some damage to runners rssul ted fr
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27 CELLSTRUCTUREANDPLANTGROWTHCRMON
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pel'fQ.,..d,-.ear17M1932. that the
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a copious precipitate deposits afte
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B) A general review of the subject
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This narrative of ineptitude must b
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does Jo run a recreational facility
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Another pote1U:ialuse for chemicals
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Newapproaches in the use of herbici
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43 sentence would bear this out". T
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More and more each year since the a
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11. Rice, E. J. The effects of cUlt
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PFSI'ICIDESUSED - - - - - - - - - -
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__..:I whether or not these apparen
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Dosage. Ib./acre Dimethyl tetrachlo
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~ ~_~ __ L L Table 2. Weed Susceoti
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- - - - - - - - ~, - - - - --- - -
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Table 7.. Weed Control in :l:!c,Ql1
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Table '1. Rat.1lISstI 'Of carrot an
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H , 'ta~l!. g,._~e~_O!~ut~• .:.:.
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65 plant press and dried in a f~ced
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67 Tablet. 'lIi! EFFECT'or AN'INO'l
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69 THE INFLUENCE JIt P.I!ll'ROLEUM
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71 1 CDEC(Ee) 2 " " 3 4 " 5 " " 6 7
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!a~l~ 1._ ~!:.c!: :!!1~hJl!:e.::m~d
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75 EFFECT;OFCOMPOSITIONANDVOLUMEOF
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A LOGARITHMICSPRAlERFORSMALLPLCflSY
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79 Do~ Calculations The actual init
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Selective Herbicides for Several Cr
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83 Susceptible weeds Tolerant weeds
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85 Marion Market 9 9 9 9 9 9 9 9 Da
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Table 5. Bai
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weeding of Lima Bean. With Chemical
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EFFECTOF HERBICIDESONQUALITYANDYIEL
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Results Date treated: 9/6/61 Soil m
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95 Date planted: 915/61 Date treate
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Table 3. Yield Data on Hanover and
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Weeding of Carrots With 'pre-lilanU
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101 WEEDCONTROLSTUDIESIN SEElED ONI
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Weather conditions at the two locat
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In contrast to the damage noted in
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107 Literature Cited 1. Althaus. R.
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Table 1. Weed control: stand of pla
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Results and Discussion. The data, p
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CIPO, Vegadex, and Randox Singly or
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Table 1•. Wa. control, stand of p
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'Ihree experiments were conducted i
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a- Table 2_"COIIlpartsonof' Several
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fJ Table 3. CcBparison of Several.
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c
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Table 1. Seeding and Weed Counts on
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WEEDCONTROLANDTHE IMPROVEMENT OF SE
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Following emergence of the tomato s
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indicates that several of the treat
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DISCUSSIONOF RESULTS Transplant Tom
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harvest was covered with weeds, and
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An additional 2 years of tests on f
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~ Table 2 .--l Average Number and P
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~ Table 4 Total Yields in Number an
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"" ~ Table 6 Bvalu~t1.on of S&l~nto
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of weed eoneee I without inj ury 't
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1. Associate Research Specialist in
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Stulllll&ry A study was lh1tlatedto
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Table 2. The residual effects of se
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FURTHEROBSERVATIONS ONCONTROL OF TH
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Table 3 - Mean per cent brake contr
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lAssociate Research Spec1alist in W
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PRE-E~mRGENCE WEEDCONTROLTEST IN RE
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161 Table 2. Tolerance of Beets and
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163 Results generally were good wee
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USE OF GRANULAR CHl!H[CALAPPLICATOR
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u.s. #1 potatoes and weed control e
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0' ~ Table 2. Pre-emergent weed con
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Table 3. Post-hilling weed control
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~/Pe.nt>:r lITn. h.7(L T1o:oTl.,:r+
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In table 2 are presettted weed a*1'
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Since rec1root is only one of the I
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w.l.th 3 and 4 Ibs. ot Randox per a
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181 CONTROLOF ANNUALWEEDSIN pOTATOE
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The following comments on the vario
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185 S\:U!U!1fryand ConclWtlon No he
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187 Table 2. Potato YIelds Followin
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Residue analysis of potatoes treate
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soil temperatures at the time the m
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( ( ~able 2. Effect of Several Che~
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195 PROBLEMSIN THEAPPLICATIONOF HER
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197 scale tests on 2 cOlJllllercial
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l!!!! Experiment A factorial experi
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frOlll plot. at .horter i*nalt (~ t
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6.50 Table 1. Effe,ct of p"e- an
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205 EVALUATION0It' DACTHAL * HERBIC
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The 1959 and 1960 replicated field
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209 TABLEII Average Weed Cont~l Exh
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Where the weed eompleJl;conststs of
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...... 1.67, 213 Table 1. Effect of
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215 Table 2. Bffect of pre-plant he
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.217 Pive pre-plant herbicide. were
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219 Table 1. Effect of pre-p1anthel
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Table 2. tilat' of pre-plantbftb.tc
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l EVALUATIONOF THREEHERBICIDESONPnE
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TABLE2. TIll HIGHESTlATEOFHERBICIDE
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Because of the lush growth of quack
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Table 2. Effects of Herbicides on Q
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Table 3. Effects of Herbicides on A
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233 The inhibitory activity was ass
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non-polar solvents. Table 5 shows t
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237 Figure I Bioassay of cbrOlll4to
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239 Weed Control and Residual Effec
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Rototilling was done in June·' SO
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243 in the spring of 1961 preceedin
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WEEDCONTROL.AR
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Li£erature Cited 1. Chappell. W. E
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Tl'eatments ghing un.811~!8facto%'y
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Table 1. Designa t ion Am1l:)en .\
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Table 3. Percent Broadleat Weed Con
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,255 CONTROLOF ANNUALWlmDSIN swDT C
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of Casoron per acre was statistical
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~.-! _ 1.37 ~ Table 2. Sweet Corn Y
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Table 4. Peroent Control ot Ann.ual
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EVALUATIONOF FIVE _~p>I!:S FOR KILL
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265 STRAWBERRY HERBICIDEINVESTIGATI
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267 Table 2. Eftect Of'herbicidet~e
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'h ", 4. Tillam lOG at 5 lb/A a.i.
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Asparagus The results of weed contr
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273 TABLEII. ~1EED CONTROLANDYIELD
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~ C'l TABLE tv. lIEE» OON1T..OLAND
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WEEDCONTROLIN TRANSPLANT TOMATOES (
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279 ·QUACKGRASSCONTROL S.M. Raleig
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281 table II. The control of:'4oaek
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no cultivation during the growing s
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SummaryandConclu.1Qp' 1. A quackgra
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If or where farmer acceptance of a
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,~, ~ Tab1.e II. Chemical. Treatmen
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so11 per plot at each sampling date
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418' 293 Table III Main Eff,ects of
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Table V, }nt ...... e..• ,fa~, I;
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plots showed smaller decreases with
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FURTHEREVALUmONor HERBICIDESFal· W
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301 In the SUIIIIIlf)1' seeding, th
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The results were similar to those o
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In another experiment, loam soil wa
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apparently due to severe competitio
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ab1e 2. Average dry weight of corn
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311 The most strllt~Mrr~ct. ~fiIIJI
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313 RE9lfm'$~lfI)DI3CtlSSION '1.",
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315 LrrERATURECITED 1. Fertig, Stan
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.~ pattern following applications o
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Ratings at the time of'gJ;Vllst; al
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THERESPONSEOF NUTGRASS TO HERBIC~I)
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'\.......- TABLE2. Ratings of Nutgr
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All treatments produced si~1f~c~tly
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A 327 WEBDe
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. Eli'FECTSali' WEEDSON YIELD AND"G
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Pollen Maturity: ",l. ,. Broadleaf
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'--' The applicators were tested un
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335 Figure 1. The effeetof partic1e
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337 SRFeader 1 On this spreader onl
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Table 4. The effect of speed, p~~cl
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Table 1: Herbicidal treatments used
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·000 .000, I II ! WEEDCONTROLRATIN
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2.5000 CORNINJURY EXPRESSEDAS SQUAR
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347 1. 2. Danielson. l , ;4. L. Ef~
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',-- 34~ 3-(3 ..4-Dichlorophenyl)-1
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weed control with adequate safety t
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Untreated Table 2. Directed Post-E"
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.s .... __ Table 7. Pre-Emel'ae~eWe
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experiment is reported herE!. Trifl
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Results are given. in Table 4~J'Rot
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In Princeton fine sand, tritlupalin
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Included in the lima. bean test wer
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Table 1. The Effects ofS8veral form
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Table 3. The effects of several for
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369 Table 5. The effects of sev~ral
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• ~ : .• \ • ' -' ..,,:- ',-"
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Heights of barley were significantl
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Table 2. The effe,cts of s~\I'~ral
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Table 4. 377 The effects of aevel8.
Page 379 and 380:
,:' A PROGRESSREPORTONCOMIo!ERCIAL
Page 381 and 382:
4. Undesirable dead stem.,lio not r
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areas under service conditionsa~ va
Page 385 and 386:
We ,prpbablyhave no speeie of g~owt
Page 387 and 388:
control. At the end of the third ye
Page 389 and 390:
initial defoliation was evident lat
Page 391 and 392:
OBJECTIVE In 1958 an experiment was
Page 393 and 394:
Replicates DlO 810 I 2.0 0.5 II 1.5
Page 395 and 396:
DISCUSSION One Year After Applicati
Page 397 and 398:
1. Button, E.F. Bndwrfg'h~';J .L. ,
Page 399 and 400: 399 The treatment consisted of appl
Page 401 and 402: 401 FIELD PROCEDURES Although. the
Page 403 and 404: 403 In the light of these data it a
Page 405 and 406: 405 ...·1!MLE I SAMPLECHARACTERIST
Page 407 and 408: 407 , '.". '.·',',~'l~rL,i;'. "\"
Page 409 and 410: dltterent l"atespacaoreand"~"at thr
Page 411 and 412: 411 RESULTS ireatmentettect was det
Page 413 and 414: , 413 ;. ' "1 ' "':j " • made wit
Page 415 and 416: ( ( . Table 3. Effectiveness on Spe
Page 417 and 418: 417 FENURQlt,A PROMISINGNEWTOOL FOR
Page 419 and 420: There are a number of reaso~ for un
Page 421 and 422: .n_ots, "'hhin a few months after:
Page 423 and 424: sater method ot tree-killing close
Page 425 and 426: Material ~izone is a,mixedf~g.. t w
Page 427 and 428: 427 On November 16, 1961, at the en
Page 429 and 430: CHBMI-THINNINGWITH,AIrlINES IN THED
Page 431 and 432: These tests show once aaaiJithe nee
Page 433 and 434: Th:Ls ch!~ca1. tx'eatme:n1!_1IhClJ.
Page 435 and 436: : if.. . ' A Comparative Study of t
Page 437 and 438: 'j 437 petioles, now elongated,f'or
Page 439 and 440: Helisoma, Menetus, fhYSa andValvata
Page 441 and 442: i s. The benth1c populat1Q~ W¥", O
Page 443 and 444: 443 Eurasian. wa~lfoil a W8t.f~~ ap
Page 445 and 446: Empb4sis was on testing DOD-volatil
Page 447 and 448: 447 . , , -. I':'V'est~a.ti
Page 449: FIELDOBSERVATIONS UPONESTUARINE ANI
Page 453 and 454: TABLE1. Responseof oysters t~ diffe
Page 455 and 456: In the'Dundee Creek series. ,one of
Page 457 and 458: workers. springer (1961) cite8& num
Page 459 and 460: OBSERVATIONSONTHE OCCURRENCE' ANDPE
Page 461 and 462: 461 TABLE! Chemical Water QuaU1?::r
Page 463 and 464: TABLEIII Threshold Taste and Odor C
Page 465 and 466: (1.1-) Burttschell, R.H. , et al.,
Page 467 and 468: Code A - seeded June 29 B - seeded
Page 469 and 470: SUIIIIJ~, ~ Conclusions 5' 469 The
Page 472 and 473: III. Average turf scores l' of thre
Page 474 and 475: 474 PIft'J'OTOXICBlFBQTS'QJe'CBRTAI
Page 476 and 477: 476 MERIONBLUEGBASS• T!BATANDsgD
Page 478 and 479: 478 In general. the treatments appl
Page 480 and 481: 4BJ days follow:lng the ohemical tr
Page 482 and 483: ') ') ' :_B!.ue~s•. Fescue au:l~"
Page 484 and 485: :". ',J P~E~ C!',. O~.C~G~S 'F.~HEM
Page 486 and 487: Lima and ferd'1izer applications sh
Page 488 and 489: 4es 1'.o~~1ty, ", .ewf!r''''rsenc.
Page 490 and 491: } ) Table 1. Besu):ta.Qf 1961 pre-e
Page 492 and 493: 492 corresponding plots on este.bl1
Page 494 and 495: 494 ae.u!s,'I!IIDi,cua.:Lon leUllll
Page 496 and 497: 496 D±!3pa,~n~ Resul te)I? .,l-ta,
Page 498 and 499: 498 1 . 1 J. E. Gallagher and n. J.
Page 500 and 501:
500 Da1;ejJ01 e~uations ~,a.;t'ollC
Page 502 and 503:
502 TADLEIt Comparison of "severalc
Page 504 and 505:
504 TADLE3: Pre-oemergence and poet
Page 506 and 507:
506 Table 1. Re8eeding Resulte:afit
Page 508 and 509:
5"8 d1propalin ortrifluralin 'at ':
Page 510 and 511:
510 aUlIPIl iri '-1: ' D" "" Diphen
Page 512 and 513:
Fall ve. spriif ~nts .. 'Ibe",obl1.
Page 514 and 515:
514 ~ Tab1e2. Cr&bgraS$'Contr01 in
Page 516 and 517:
516 ,';1:".i'"'f'!r": :~,j i: .. r
Page 518 and 519:
. ~lS residual cemtrol of crabgrssi
Page 520 and 521:
520 - . \.. ; ."," ,
Page 522 and 523:
5~2 'rab4t13.· ~gtnc. ·QGabtiol:o
Page 524 and 525:
524 PRE.._RGENCE AMU' POsT-EHERGENC
Page 526 and 527:
526 Table 1. 'l'a):lsra,. ContrO.k1
Page 528 and 529:
528 Pre- andpost ..emergejljCec:rab
Page 530 and 531:
530 Prior to each chemical applicat
Page 532 and 533:
u 532 3) Those trea.t,mellts which
Page 534 and 535:
Table I (Coot'd) 27. JSc.F,~iOe t$~
Page 536 and 537:
536 EXPERIMENTS ONTHECHOOCALCOIm'l)
Page 538 and 539:
~______ , 53S Table 1: Control of c
Page 540 and 541:
54' In a similar po st-ell1~rgence
Page 542:
542 da~hal and diphenatrile) at ear
Page 545 and 546:
.. ";' -:' il; JT!.: .'\ i~'J" ; ~J
Page 547 and 548:
541 Distr:tbution of radioacti~tl t
Page 549 and 550:
549 •RESULTS The distribution of
Page 551 and 552:
GRAPHII: Comparison of the~.tl;'i~u
Page 553:
"-...-.. J.4 The distribution of r~
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Vol. 16â1962 - NorthEastern Weed Science Society

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Vol. 16â1962 - NorthEastern Weed Science Society