Vol. 16—1962 - NorthEastern Weed Science Society

84
COmbinations· of CIIlC and CDA!prQved safe on ~ • However, weed colll'Ol
was in most looatklDa· sl.1ptl;y l.cMIr than ttiat obtatniQ.
with .eit.her DaotJl&l.Qr ·Zytroa. Weed specie toleraDQeand susceptibility
followed about the Slime pattern with the combinationS as noted above with
Dacthal and Zytron.
Yield data of good reliability is not generaJ,l;y .v.uable from these .tests
because of the need for harvesting plots differentially depending on residue
sample needs. Incom,plete yield records, however, tended to bear out the visual
ratings of crop response.
Samples for residue analYsis were obtained frOIDiau lOcations. All slll,Ples
were submitted to the appropriate comp8llylaboratory. Detailed results are not
yet ~va1lable, however, the pre11miJ:l!l.rypicture locke. Vilry good for Dacthal·and
for CDEC-CDAAcombinations.
Cabbage Var~ety
Reseses.,
A county apnt work.~ with the slime treat~8," those in the 15 teats
described above, reported severe CI8mllgefromZytroncm:seeded cabbage. An
investigation was made of such factors as soil, environmeo:l;, rate, etc., butno
cause for this trouble was evident. Two .factors vere suspect: the formulation
used in the ageo:l;'s work was somewhat different from that used in the 1960
Cornell work; the cabbage varietywu a newl;y introClucedYellows Resistant 8Lory.
Tests were iIIIIIled.iatel;yconducted 0110cabbage and brocaol:l to determine if tor.. '
mulat10n -were a faC'\ior. These tests.indicaUdno differential response beUeen
1959 and 1960formulat,ions regardles" of rate. A tee1;, involVing five var:let:Les
of cabbage was then conducted. Marion Market was inoluded because it was the
variety on whic;h an.previous CorneU.berblcide wOrkh14 been done. In add1'Uon .
to the new YeUowa.Resistant .~~ yv~y wb,ich l:la4.-.en'damaged, two B'tabaard .
strains of Danish Ballhead were included, one of which was yellows resistarlti.
Also included was a new hybrid C~.
The exper1meo:l;al design for chemicals was a randomized block with 4repj.1­
cations •. Dacthal and Zytron wer•. iLnc1udedat 12 po\Dldaeacb. Individual. plots
were 6x2o feet and the f:lYe ,var:Le1:lt,.verf:plwecl •• .ayatematic order
lengthwise of eBlOlapl... Plot.' were fitted, seeded • treated JulY 11. The
sandy loam soil was moist and in excellent physical condition. Light shovers
followed plao:t;1ng.Tb,1spluswarlll weather promoted rapid germination and an
almost perfeet .stand resulted •. ,.libeJlt.be plant8 llIl!l:re.wall-eatablished the7 .re
tbinned.tO.a~tely,one.per toqt e>trow.'
. . .. ,. .
,"The variety :L"e.poDSesare presented in T-.ble .3. It is readily apparebll
that· Dacthal. badDO adver,e eff~C't on any variety. HlMmtr,. Zytron was 'Y&l'1eble.
Mar1onMll.rketwas.llI:)t.inJ~ed. ,Iiles:a..tant Glory&Q4aedstaDt Danish,. bowYer,
gave severe s)'lll}YtQlll8 in eertainr.i¢ates and DOt-~j;he others. The otber
var1et.1esvere, .not1Dflu.e&ced~~c"it -.ppears tbati,the Zytron damage re ...
ported from the field, was poa.ib;Ly d.lMtto diftereDt:t.a. varietal response.