Vol. 15—1961 - NorthEastern Weed Science Society

Table ;.
Visual RatiDgs and Stand Counts on Lea!'Y Spurge, Zahn Farm
Visual Rat:Lng* Stand counts - Av. No.
May 13, 1960 per square foot **
Treatment Chemical Rate/A. Regrowth Seed Stage Regrowth
No. Used lbe. A.E. stage (only) stage
i "
1 ..Ammate..,X 600 4.5 5·4 4.0
2 Amitrol-T (retreated) :; 8.0 0·7 0·7
; Check' , 0 0.0 7·0 6.0
4 Amitrol-T 15 2·5 ;.0
t l
5 Amino Tr1azole 5 6., 4.0 5·0
6 Amino Triazole P 10 '.5
3·9 4.5
7 Amino Triazole p) 15 4.0 4.'
8 ACPM-103-A (retreated}lO 6.0 5·2 6.4
9 ACPM-1O;-A 20 ;.0 9.4 5·5
10 ACPM-;54 10 5·5 7·0 ;·7
11 ACPM-;54 20 7.0 ./ . ;
12 2,4,5-TP (retreated) 20 9·0 4.4 0.5
1; 2,4,5 ..TP 40 8.0 5·; 5·0
14 Check 0 0.0 10·5 6.0
. "~ -, -(
,* Rat ing values: o :: No control
10 =Complete control
** Average of the 4 replicates
On July 10, 1959, a second series of treatments vas established onHanother
area of Leafy Spurge in Jefferson County. The c.hemicals used and re.tl;ls per
.acre'are shown in Table 4.
Visual ratings were made on these plots on May 12, 1960 and stand counts
on September, 14 and OCtober 1;, 1960. Table 4.
Table 4. Visual Ratings and Stand Counts on Leafy Spurge, SpragUe 'Farm
Visual Rating-made Stand 'count. -made
May 12, 1960*, Sept •. 1960**
Tre.atment Chemical Rate/A. SandY Silt loam Sandy Silt loam
No. Used lbs •. A.E. soil soil soU soil
1 2:..4,5-TP 5 9.0 5·0 1.1 7·5
2: 2,4,5-TP 10 10.0
2.;
5..'
'9·0
; Am1trol ...T 5 7·0 4.0 0.6 ;.8
4 Amino 1'riazole (p) 5 7·0 .4.0 0.;; 2.;
5 Atrazine 5
,
2.0 l~O ;.0 7·;
6 Benzac 1281 5 7·5 5·' 2., 6.5
7 Fenac ~.o 5·0 ;.4 6.1
8 Fenac 10 9·5 7·0 2.; 5·;
9 Check 0 0.0 0.0 6.; 4.4
* Ratings values: 0 = No control
10 = Complete control
** Average of 2 sq. ft. quadrat counts per plot.