Research Report
Tenacity + Princep + Pennant Magnum for Goosegrass Control in Bermudagrass Table 1. Injury to Tifway 419 bermudagrass from the applied treatments. Tifway 419 Bermudagrass Injury (1–9 scale) (1 = no injury, 4 = unacceptable injury, 9 = complete death)
1 Untreated Check
3 DAT 7/25/14
9 DAT 7/31/14
16 DAT 3 DAT (2) 8/7/14
24 DAT 11 DAT (2) 8/22/14
31 DAT 18 DAT (2) 8/22/14
37 DAT 24 DAT (2) 8/28/14
45 DAT 32 DAT (2) 9/5/14
1.0
1.0
1.0
1.0
1.0
1.0
1.0
2 Tenacity, plus Princep, plus Capsil
5 fl. oz./a 8 fl. oz./a 0.25% v/v
AB AB
2.8
5.9
4.3
6.5
6.4
6.6
3.5
3 Tenacity, plus Princep, plus Pennant Magnum, plus Capsil
5 fl. oz./a 8 fl. oz./a 21 fl. oz./a 0.25% v/v
AB AB AB AB
2.8
6.6
4.5
6.6
6.4
6.6
3.1
4 Tenacity, plus Princep, plus Capsil
5 fl. oz./a 16 fl. oz./a 0.25% v/v
AB AB
2.8
5.4
4.0
6.6
6.0
6.3
2.9
5 Tenacity, plus Princep, plus Pennant Magnum, plus Capsil
5 fl. oz./a 16 fl. oz./a 21 fl. oz./a 0.25% v/v
AB AB AB AB
3.0
6.6
5.0
7.5
7.1
7.4
4.3
6 MSMA, plus Sencor
2 lb. ai/a 5.3 oz. wt./a
AB AB
4.0
2.5
2.8
2.8
4.9
5.3
2.6
0.6
1.1
0.6
0.9
0.8
0.6
0.7
LSD (P = .05)
Table 2. Injury to TifSport bermudagrass from the applied treatments. TifSport Bermudagrass Injury (1–9 scale) (1 = no injury, 4 = unacceptable injury, 9 = complete death)
1 Untreated Check
3 DAT 7/25/14
9 DAT 7/31/14
16 DAT 3 DAT (2) 8/7/14
24 DAT 11 DAT (2) 8/22/14
31 DAT 18 DAT (2) 8/22/14
37 DAT 24 DAT (2) 8/28/14
45 DAT 32 DAT (2) 9/5/14
1.0
1.0
1.0
1.0
1.0
1.0
1.0
2 Tenacity, plus Princep, plus Capsil
5 fl. oz./a 8 fl. oz./a 0.25% v/v
AB AB
2.0
3.4
2.3
4.4
2.4
1.5
1.0
3 Tenacity, plus Princep, plus Pennant Magnum, plus Capsil
5 fl. oz./a 8 fl. oz./a 21 fl. oz./a 0.25% v/v
AB AB AB AB
2.0
3.5
2.8
5.1
2.5
1.5
1.0
4 Tenacity, plus Princep, plus Capsil
5 fl. oz./a 16 fl. oz./a 0.25% v/v
AB AB
2.3
3.4
2.8
4.3
2.6
1.6
1.0
5 Tenacity, plus Princep, plus Pennant Magnum, plus Capsil
5 fl. oz./a 16 fl. oz./a 21 fl. oz./a 0.25% v/v
AB AB AB AB
2.3
3.4
2.8
5.3
2.9
2.0
1.1
6 MSMA, plus Sencor
2 lb. ai/a 5.3 oz. wt./a
AB AB
4.0
1.9
3.0
2.0
3.6
2.4
1.4
0.4
0.6
0.7
0.7
0.8
0.7
0.4
LSD (P = .05)
26 | Virginia Turfgrass Journal May/June 2015 www.vaturf.org