Vol. 16â1962 - NorthEastern Weed Science Society
Vol. 16â1962 - NorthEastern Weed Science Society Vol. 16â1962 - NorthEastern Weed Science Society
492 corresponding plots on este.bl1~4~,. but were ~~ll not .o.s effectiveaa the other materiaJ.s included in thei!le triaJ.s. Another point t1;lat is feltd)~;:ieof SUfficient~:¢t to be reported here is tha.t when the annuaJ. sr$BN began to devel~ in the poor turf area, it was obs~rved thEtt approx1mo.1;G~;LOi of the gro.s.were that of corn- . grass, Pan1CU1l1d:l.chotcu1flor:um.· '~s is an annual JfRlecies of grass that, OJ.th~not cOIDIIIQn, 1.s apparent~ t'oundas 0. lo.~ ~a. iJl some areas on '. Long I,sland. This was first b~;t, to our attant* severnl years ago quring post-emergence crabgrass control trials at our research plots (3). zvtron anddacthaJ, gave excellentcpntrol of this ~ srass (m).Cnlchm arsenate, however, did not appear to be effe:ct~ve end the FanicUlll continued to develop.wi1;hin the13e plot. even thoughc~ass control was excellent • It appears, ·there:t'ore,.t~ cal,oium arse~ ,10 mqre selective. in its toxicity to tho various -SPftc~s.·of annuaJ. gr~8e~ ~e.n either qtronor dacthaJ.. ~is ~ ~an :U/i)Ortrmt consideration ill ,~as where Panicum species are 0. problem. It should be emphasized th~,:the8e are only one years observations. NOtutf' inJlri:y- ratings couldb.mado for BDYofthe chemicals within this area becwse of the lack of Ilutticient st-ands Orthe desirable grasses to make accUrate ratings. , , Under the conditions of thes,e trials, a ll\IlI1ber"~1;he pre-emergence. crabsrass. control chemicals gave soQd cOlXtrol ot ~sto.ss. ~ron and .' dacthal continued to givc excellent. crabgrass cont~~ (96to 100%)althoUgh slight to moderate turf injury was noted. Turf inJul-y by these materiaJ.s was confined to red fescue and bell:l;.p-.asswith nOI\lli~ent injury to Kentucq bluegrass. , Calcium arsenate was ',~so effective 111,~rolling crabgrass. (96to 99il. Chlordane and .the ars~icaJ.-fertllizel fOrmulation gave goo9., control of crabgrass on established:. turf althoush ~ degree of control ~ reduced in ,trials on poor tUrf'WhG~ larger populat~pns of crabgrass ...•. developed. Diphenc.trlle gave, on:Iy .:~ intemcdiate, ';j!ve:L of control at,1;~~ '. recommended rate although the degree of control incr~ased proportionately . as the raw of ll,p;plication was incrilased. CalciUlllWopyl arsonate gave only negligible crabgra.ss control. ."." Pan1cum dichotOlll1florum wase~;f'ectively contr64ed by dacthaJ. and zy'ti-on but was not controlled in plots treated with calciuilf arsenate. . Literature Cited 1. Mower, Jl,. G. and J. F. Cornman. 1961. EltPerilneij'i;s11l pre-emergence crabgrass control. Froc,H.E. Weed contt=91C6nf. 15:264-267. qrabgrass control. . . 3. .' 1959. 9b¥rve.t~ons on pre-emergence' and post-emergence crabgrass ~ontfOl, etC.Proci~N.E. Weed Control Conf. 13: ise-rn, "
COMPARISONOF CHEMICALSroJ{'''''EMBRGENCE JobD1t'. HaVis 2 ~SS CONTROLIN TURF l ':: 493 The area used for this t.at had been ..... dto a fairway mixture about fifteen years previously~ The grasses present were mostly bluegress and fescues. Miscellaneous weeds were present, includlQ8 dandelion and plantain, but very little natural: crabgrass. During the first two week. of April, 19&1, the grass was mowed to 1 1/2 inches, fertilized with 10-6-4, and a light top dressing of soil was applied. The area ¥as then seeded Wf.th5 pounds of weed seeds having a high perceDtapof crabgrass, ,l'the area, 32 x 60 fe.t, was dlvided tnto24 plots '1:'FliO feet in siH/le This provided plott for 8 treatllle!¢s, ll\clud1ng.'a,reheck, replica_ three times. The' area had a slight pitch to the east but not _fieient to cause excessive washing. Seven granular pre-emergence herbicides were applied April 14 at rates racollllll8ndedby tu "'lWfacturers, a.':.11ows: Per 1,000 Sq. Ft. ,:"H (Pounds) PAX- "new" formul~~ (more arsenic~ •. Less N) 20 Bandane 7.5% 6.1 Tricalcium Arsenate 48% (1961 formu1tlion) 16 Dactha1 2.3% 10 Zytron 4.4% 8 Ca1~i~ Propyl Arson.~a 20% :r£., 5 Diphenatrile 11. S% 6 Irrigation was not available. The spr1Dg weather was cool and moist, rainf,dl during May"measuring 4.67 1...... Crabgrass in.the test plots germinated about JUne 15. The fiutweek of July the turf area was given a second appl1cation of fertiliser and sprayed with 2,4-D to kill broad-leaved weeds. The grass was mowedweekly at 1 1/2 inches. 0,1 L. t.e., lContribution Number1331. Maiiachusetts Agridaltural Experiment Station. 2Department of Horticulture, University of Massachusetts, Amherst.
- 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 and 450: FIELDOBSERVATIONS UPONESTUARINE ANI
- Page 451 and 452: more than 2 feet. ExceptionalUdes s
- 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 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
COMPARISONOF CHEMICALSroJ{'''''EMBRGENCE<br />
JobD1t'. HaVis 2<br />
~SS CONTROLIN TURF l<br />
'::<br />
493<br />
The area used for this t.at had been ..... dto a fairway mixture<br />
about fifteen years previously~ The grasses present were mostly<br />
bluegress and fescues. Miscellaneous weeds were present, includlQ8<br />
dandelion and plantain, but very little natural: crabgrass.<br />
During the first two week. of April, 19&1, the grass was mowed<br />
to 1 1/2 inches, fertilized with 10-6-4, and a light top dressing of<br />
soil was applied. The area ¥as then seeded Wf.th5 pounds of weed<br />
seeds having a high perceDtapof crabgrass, ,l'the area, 32 x 60 fe.t,<br />
was dlvided tnto24 plots '1:'FliO feet in siH/le This provided plott<br />
for 8 treatllle!¢s, ll\clud1ng.'a,reheck, replica_ three times. The'<br />
area had a slight pitch to the east but not _fieient to cause<br />
excessive washing.<br />
Seven granular pre-emergence herbicides were applied April 14<br />
at rates racollllll8ndedby tu "'lWfacturers, a.':.11ows:<br />
Per 1,000 Sq. Ft.<br />
,:"H<br />
(Pounds)<br />
PAX- "new" formul~~ (more arsenic~ •. Less N) 20<br />
Bandane 7.5%<br />
6.1<br />
Tricalcium Arsenate 48% (1961 formu1tlion)<br />
16<br />
Dactha1 2.3%<br />
10<br />
Zytron 4.4%<br />
8<br />
Ca1~i~ Propyl Arson.~a 20% :r£.,<br />
5<br />
Diphenatrile 11. S%<br />
6<br />
Irrigation was not available. The spr1Dg weather was cool and<br />
moist, rainf,dl during May"measuring 4.67 1...... Crabgrass in.the<br />
test plots germinated about JUne 15. The fiutweek of July the turf<br />
area was given a second appl1cation of fertiliser and sprayed with<br />
2,4-D to kill broad-leaved weeds. The grass was mowedweekly at<br />
1 1/2 inches. 0,1<br />
L. t.e.,<br />
lContribution Number1331. Maiiachusetts Agridaltural Experiment Station.<br />
2Department of Horticulture, University of Massachusetts, Amherst.
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