Vol. 15—1961 - NorthEastern Weed Science Society

141.
Results - .l2.22
Table 2 shows the treatments, the weeding dates. and the effects on
the three ericaceous plants at' the end of the first season.
The check plots needed weeding six times during the season. The use
of herbicides reduced the number of weedings to two or three. except that
plots receiving slmazine needed only one weeding for the season.
Stand counts and height mea8ure~nt8were made September 25, 1959.
No differences we~e found for Taxus and Juniperus.
The results for the ericaceous plants are shown in Table 3. Using
survival counts and plant height as criteria of injury. EPTCand amiben
were the most injurious chemicals. CDECcaused injury at the high rate
only; no injury resulted from CIPC or simazine •
......................................................................., .
1
2
3
4
. TABLE2. HERBICIDESANDRATESATTIMEOF SETTINGPLANTSIN
THELINING-OUTBEDWITHDATESOFWEEDING
REQUIRED
DATEOF
TREATMENT FIRST SECOND APPLICATIONDATESOFWEEDING
WEEDINGOF HERBICIDE SECOND THIRD
EPTC4 lb./A
EPTC6 lb./A
EPTC8 Ib./A
EPTC5 1b./A
5 EPTC10 Ib./A
6 COEC5 Ib./A
7 COEC10 Ib./A
8 Amiben 4 lb./A
9 Amiben 8 lb./A
11 Simazine 2 Ib./A
12 CIPC 8 lb./A
(incorporated)
"
II
(surface)
"
"
"
"
"
"
"
7/6
7/6
7/6
7/6
7/27
7/1
7/6
7/6
1/6
7/27
7/1
EPTC5 lb./A
None
None
None
None
CORC7 lb./A
Repeated
Repeated
Repeated
Repeated
CIPC 10 lb./A
10 Check Weeded 6/8. 6/22, 7/6. 8/5, 8113, 9/21
••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
(surface) 8/18
8/13
8/13
8/18
9/21
8/18
8/18
9/21
9/21
••
8/13
9/21
9/21
9/21
9/21
9/21
9/21
9/21