Vol. 16â1962 - NorthEastern Weed Science Society
Vol. 16â1962 - NorthEastern Weed Science Society Vol. 16â1962 - NorthEastern Weed Science Society
524 PRE.._RGENCE AMU' POsT-EHERGENCICWBGRASS ,',' . . . :0'. CONTROl.XJ"TURFGWS" 1~: i: , "):t 2 C. D. Kesler. R. H.'lole, and C. E. Phillips The objective of this study was to evaluate the effectiveness of severa1chem1cals ...• far;the control:," crabgrass on " established Kentucky b1uegra" turf. :'~;; . 'c . > Materials and Methods ., '-. " 'J~J1' . The experimental area.,.. -located on tIbe l\8r1cul tural Experiment Station Farm at· ... rk. Delawan.'Chemicals were; applied to a Kentucky blue'g'tatls·turf heavlJ,:tnfested with cribgrass the previous season. 'rb- crabgrass t()pulation cons1ste~ , of approximately 90 percent smooth crabgran ~Digitaria ischaemum,. and 10 percent common crabir~s, Digit!rl",~ulnalis. The plot layout .. a randomized block designlQ9Qf sting of2 r.p~ications and 17 treatments. hch plot mea."red 12 feet by 20':Jee~. 'fl':, '; The soil was a Matapeake silt 10amofjWledium fertilltywtth a pH of 6.0. Fertilizer was applied in the early spring as indicated by soil tests. The area was mowed once a week to a height of 1 1/2 inches. Pre-emergence uterial. were applied .. March 20. Emul.ifiable concentrates and wettable powders W8~.,:applied in water ·1jith a modified bicY
The area was not irr~•• · Within 24C'ltobl's after the application of the first and second post-emergence treatments, there were .70 laches and :1t,l::rlnches of. precip:Ltation, respe~ tively. No precipitation ,ococ.rred withio' days after the third post-emergence application. ~ j l ;J 525 Periodic obs.rvations" for turf injury and crabgrass con-:'::· trol were made following application of the chemicals. Dis- .'::; . coloration readinss were taken 5 days after each p08t-emerg ... ~~ application. ' The>percentq •• of crabgrass contrl:)l and turf ..r.~li', grass injury weredeterminid by averaging Httutes of three '.::'L" independent observers. : :.\, ~;_ {:I':« ', The herbicidal materials used and rate of active ingre- :h dients per acre are included with the data in tables land '2.,'1 Results and Discussion Table.laa.d 2 show the ..esults obtaldta With the chemi';"~C' cals used in this experimeltt~·, ;,m~' : None. of t\\ .• pre-emergent. chemicals produfed any obserY~:.~· able turf discOloration ort","f injury.Zytron liquid formulations were the only trea~dts producirta excellent control of crabgra .. dUring the entire growing season. Granular zytron and,dacthal W-50 gave goodeontrol.' '1::1: Tricalcium arsenate and calcium propyl arsonate produceef: 1 excellent control early in the season. By mid-summer, contr
- 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$'Contr01 in
- Page 516 and 517: 516 ,';1:".i'"'f'!r": :~,j i: .. r
- Page 518 and 519: . ~lS residual cemtrol of crabgrssi
- Page 520 and 521: 520 - . \.. ; ."," ,
- Page 522 and 523: 5~2 'rab4t13.· ~gtnc. ·QGabtiol:o
- Page 526 and 527: 526 Table 1. 'l'a):lsra,. ContrO.k1
- Page 528 and 529: 528 Pre- andpost ..emergejljCec:rab
- Page 530 and 531: 530 Prior to each chemical applicat
- Page 532 and 533: u 532 3) Those trea.t,mellts which
- Page 534 and 535: Table I (Coot'd) 27. JSc.F,~iOe t$~
- 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~
The area was not irr~•• · Within 24C'ltobl's after the<br />
application of the first and second post-emergence treatments,<br />
there were .70 laches and :1t,l::rlnches of. precip:Ltation, respe~<br />
tively. No precipitation ,ococ.rred withio' days after the<br />
third post-emergence application.<br />
~ j l ;J<br />
525<br />
Periodic obs.rvations" for turf injury and crabgrass con-:'::·<br />
trol were made following application of the chemicals. Dis- .'::; .<br />
coloration readinss were taken 5 days after each p08t-emerg ... ~~<br />
application. ' The>percentq •• of crabgrass contrl:)l and turf ..r.~li',<br />
grass injury weredeterminid by averaging Httutes of three '.::'L"<br />
independent observers. : :.\,<br />
~;_ {:I':« ',<br />
The herbicidal materials used and rate of active ingre- :h<br />
dients per acre are included with the data in tables land '2.,'1<br />
Results<br />
and Discussion<br />
Table.laa.d 2 show the ..esults obtaldta With the chemi';"~C'<br />
cals used in this experimeltt~·, ;,m~' :<br />
None. of t\\ .• pre-emergent. chemicals produfed any obserY~:.~·<br />
able turf discOloration ort","f injury.Zytron liquid formulations<br />
were the only trea~dts producirta excellent control<br />
of crabgra .. dUring the entire growing season. Granular zytron<br />
and,dacthal W-50 gave goodeontrol.'<br />
'1::1:<br />
Tricalcium arsenate and calcium propyl arsonate produceef: 1<br />
excellent control early in the season. By mid-summer, contr
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