Proceedings of the Sixty-first Annual Meeting of the Northeastern ...

52
Table 1. Results of 2006 container experiment with granular herbicides. *
Weed counts/3 pots
Hydrangea
macrophylla
No. Herbicide lbs 4WAT-1,7/19/06 4WAT-2,10/11/06
Prod crabgrass groundsel poa annua groundsel Injury (0-10) Vigor (0-10)
per A No % control No % control No % control No % control 7/6/06 8/9/06 8/31/06
1 Untreated - 719 0 250 0 502 0 18 0 0 0.7 9.3
2 OHP 100 126 82 30 88 48 91 0.3 99 2.5 2.2 7.6
3 31906 200 27 96 5 98 52 90 0.3 99 2.8 2.5 7.2
4 400 1 99+ 0 100 8 98 0 100 3.5 4.7 5.7
5 OH-2 100 73 90 38 85 71 86 0 100 3.0 1.6 8.1
6 Snapshot 150 60 92 30 88 18 96 5.0 71 1.3 2.5 7.8
7 Weedfree 100 107 85 36 86 86 83 0.5 97 2.8 1.3 8.3
8 75 200 15 98 4 98 6 99 0 100 2.8 3.8 6.4
9 BroadStar 150 15 98 5 98 51 90 0 100 2.8 2.3 7.4
10 Showcase* 100 66 91 42 83 - - - - 2.3 1.3 8.6
11 Showcase* 200 8 99 3 99 - - - - 2.8 3.0 6.8
12 Ronstar 2G + 200 7 99 51 80 20 96 2.0 88 2.3 2.8 7.3
Devrinol 10G 40
*Herbicides were applied on 6/21/06 and 9/7/06
34