Vol. 16—1962 - NorthEastern Weed Science Society

In table 2 are presettted weed a*1' C%'Opresponses'topOm:-emergence appll.
cations. ODeoft!le 1IIOB'tII'tr1ld.rlg''WlIIed:-~1't'e occur1'edon mila. Here, no
weeds developed after la:y'ooby. This ,vas undoubtedly due to the rapid heavy' ,
foliage growth of the pota1ioes plU& ,the relatively e81'!tbarvest.The ~-,!'at.
ings which are in the table were taken approximately six weeks follow1ng trdtiDg.
Ratings taken at harvest are not presented in the table, but were practicall,y "
identical. This indicates that ear1:Ychemical' aet1vitt plus crop shading can
give sufficient control of weeds under Upstate condit1oDs.
~a'e..l~ ~',.. ~~a~o,..&rii_WfJ..~ ::.e2Jl2.nr:i~!.t:.e!!!::.~C!. !!,e::.b!.c!:.d!s.:.
____
WeedRat ' , ,,' Cr2;P Yield
MuCk'::"- - Mineral "MuCk
Chemical Lbs. B.L:--Grasa B.L. Grass " 'Bii':
- - Mineral
iiU•. -
--------------------------~~,-,~----------~
Am1ben 4 No weeda2J 7.2 7.2 536 424
EPl'C 6 " 7.2 7.7 '..21 ...£J
Ti1l8lll 6 " 7.0 7.2 526 360 ,"
Herc. 7175 3 " 8.7 9.0 ' 195 9j
93
" 7531 4 " 7.5 8.5 3879: 423
" " 8 7.5 9.0 390
Falone gran. 4 6.0 5·7 390
CDEC+CDAA 4+4 " 7.0 6.5 454 ,422
DN ~. 5 " 8.5 7.5 658 405
DN+Dal. 5+7.5 " 8.7 7.7 406 39;
Tr1etzaine 4 " 7.7 6.7 401 450
Dacthal 10 " 7.0 7.2 615 392
Zytron 10 4.0 5.2 317
R&HF-34 6 7.0 7.5 404
CDEC+CDAA 4+4 6.7 7.0 447
(gran.)
!C~ c~!. :. 2·1 5.:.5__ :.. _ 23~ 32 6 _
r QClt
9/3ee table 1 for species.
!/9=eomplete control; 7-eommercial control; 5-l1nSccept&ble control; 3- poor
control; l-J:leavy rank growth.
~Thorough tillage plus rank top growth prevented subsequent weed developnent.
£tParts of these plots were harvested at 3 intervals for'residue ~seslhence
A ,accurate yields are I1nSvailable.
~ 6 lbs. instead of 4 lbs. of 8043.
, ,
r __
175