Vol. 16—1962 - NorthEastern Weed Science Society

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66
iJ . f. third treatmeQt involVed the placingot, tIiIi h.rbicid. 011
tbe pec1uDc'le.' midway,bet:weelfl'lthe rillchl •• ':ptrdUQote base. '1be
ten' m:fiCl"oliterck'oJ)let' ..... cIed'ioto' t'".equal parts aa4
.aCh .pat:t;'''Pp1t8d to d1ffere.": pedUDc1".'1b1W'~t:hre. p.chmc18s
-of th&'Uiabetll""trest~' With the total clo... ·beldS 0.5
mierocutte •• ' 'No tritOn "',u'ed. ~lban appa1.' tfo a 7S per cant' "
sture' ·t.liiRl fol" '.three.clay tnatment p.rf:04itlt' wa.trAn.- .
locat.d up the peduncle aactl!achll and lnto.st1ke. NoDewa.-':'
lIIOVeddown tbe peduncle. fib•• imilarly applied to a mature
umbe'l,tbe tIIlMlli\8ntwa. agaiU-f.&1tothe apike-.f'bUt there •• al.o
a .Uzht· aiovemeat dCM1"tbe ptdunc1e ~ . . ,0,' c . ' .
.-.... . .
\ ,. , .
Field plant. which vera tr8atecloo AuCU.t 17: eXhib:Lted a
l114t:kcldcblfttseititheir app.aruce by Aueult2t.lnthe plot 1'••.
ceiv1Dgtwo pOUlld. per .. e'. thawtera.s luuI:~a1oped a a1:Lgbt
chlorod.; planta in the four pound plot were darker yellow, and,
tho.aid eM eight pound plot wara nearly Uub-=bI'own·. '
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I.~ Had' harvest t:l.me;Sapt8lllber 1 811411>':,the planta that Me
sprayedOl1I.ugu.t2G hed .bOuttb .... colot!' as :those :Lnthe chMk
plota but those that hed 'baeD'Ipnyad ,011 Aupt, 17w8n st111' 'I
chlorotic. It was noted that the plants sprayed on Aucust 17 hed
fewer .alde 'p.inflorescence and plane. tr •• cecl with eight pound.
of tl1e cbelllica1 pl'Oduced Ollly:wenty ..f1ve puJ·CleIt'of the yield
barvested from:the two pOund tr.eatllleDt. ;.,",., '
Analyats of thedat. ar8l'pre .. nted in' Tablet[; '1't is reedUy
appareatthat emina tri.BOle ·-.pray. had a deieten.ou. and sten:LU·
.cant effect 'onaead serm1natton •. Hhen the tna'tlll8tits a~e compared.
it is leen that seed from the check plotl 8~aated .isnif1cently'
greater than tho.e from any of the otber treatments. A lineal effect
extsts 8IIIOngthe rate. of applicat:Lon, with the higher rates of the
ob8lllical giv:Lng the pooreat g4mDination. Seed from plots treated
on Auguat 17 1dth e1ght pounds of amino tr:LallOle germinated only
ZS-30per .,ceat' es well as' 'thNe from me.cbedc·p'blts. ~1hen· oompar·
:Lns the·d.o£appl1catloNl,1t CIIDbe 't:h&tl~be'Auguat 17
. ,:'" . 'tr.atment., gftmil\4-red onlyqiftty per oen1: 11 .s,>those tba-t·
were treat" on Augu,s~t 2.·.;'mu.d1ff~r8llC8 i.hi'sJ11y~lg1lit1cau1: •
In th... teaCa, the time of.ti8!V'.•• t had .1\0idl~" On·the rate
. of' germination. "Jj- ;, '
.'-S"m'n
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. The autorad10gratlhic taelmique was U8.4-'4lO diet.l'IIiinet1'i.~.t
of tranalOC&t:Lon of C14 IIID1ncrtrt.Bole inNol'_J:In nutgrllss, The
:I.IllaZe1l1'evealed that this .ch-.d.cal istrand.-tea froDlthe p01n1:
of application to thesead l;t1lies .'l'he8l'l101itlt:Slibch1ngtha spika
depend. onthac118tancefrOlll·,the point of.,.sltcadon it muat t1:'8II'el.
The grMe.lt·.acCUIlIUlatioa ,tn 'theapik. occ.a i. _ appl1cation 11
to the peduncle, while the least aC4U11lUlat:LoD.:OcCur.whenapplied '
to the bract leaves.