Poa annua control in browntop

1
Poa annua control in browntop

• Trial at Readylawn turf farm
• 3 August 2005

2
Cultar 1 L/ha Poa reduced but alive and seeding
3
Cultar 2 L/ha Poa greatly reduced, yellowed, or
darker colour
4
Moddus 2 L/ha Poa significantly reduced,
stunted, few seedheads.
5
Moddus 4 L/ha Poa greatly reduced, very stunted,
no seedheads.
6
Hussar plus Partner Most browntop and Poa killed
7
Tribunil 1.5 kg/ha Slight browning of browntop
and Poa, no obvious reduction.
8
Nortron 1 L/ha Browntop browning and damaged,
Poa unaffected
9
Nortron 2 L/ha Severe on both browntop and Poa
annua
10
Hussar
Tribunil 1.5 kg/ha
Nortron 1 L/ha
Nortron 2 L/ha
11
Nortron 2 L/ha
12
Nortron 1 L/ha
13
Tribunil 1.5 kg/ha
14
Moddus 4 L/ha
15
Moddus 2 L/ha
16
Cultar 2L/ha
17
Conclusion

• Moddus had good suppression of Poa annua growth
  without yellowing.
• Cultar some reduction of Poa annua but some
  yellowing
• Moddus applied at 10 times intended rate
• Tribunil 1.5 kg/ha, Nortron 1 L/ha no control.
• Hussar, Nortron 2 L/ha too severe.