Vol. 16—1962 - NorthEastern Weed Science Society

~______ ,
53S
Table 1: Control of crabgrass by chemicals applied before
emergencfl.
1
'1
j. j'
Chemica-I
Zytron
Zytron
Dacthal
(liq.)
(gran,.)
(W-50)
Dact.ha.L (gran)
Calcium propyl
arsonate
(No-Crab)
Diphenat~ile
(Lilly)
Trifluralin
(Lilly J! ..'
Dipropalin
(Lilly)
Pax (36.5%
metallic
arsenic)
Dipheny1ace~onitri1e
(Agrico)
Chip-Cal (50~
Tricalcium
ar-senabe) .
'
Rate
Ib/A*'.
8
:1.6;
5
1.
15
.20
40 60
20
3')
40
.;:)'}1 r' ":
Cr~bgr.a~s C~ntro1 Rating·*'
July 21 Augugtr c'23
4
··4"
,.4. 4:
4- ,
4-'
3
4
'4 4
'4 r J
4 4:
68 4'
4
10*'
20*'
30*'
25 50
75
,10*'
15*
20*',
o
1
4
O'
1
3
i~
4'
4
4
1
1
J
Turf
InjuloY
None
II
II
" "
"
" "
"
II
"
Slight'
Heavy
Heavy
None ,
" II
J.. __
"
"
1 I
1
.:P "ro
"fI
fI
" Slight
Rates a~e 'pounds 'of activ~ material per i~e - except Pax and
Chip-Cal ,~1hi'ch are pOunds'of pro duct per~,J.OOO sq. ft.
** 4. 100% 00 ntrol; 3 = over 90?~; 2 = 60-90;::; 1: = 25-60%
o = less than 25% control.,,! rt.
I.:'}