Table 1 Herbicide treatments used in the trial
Treatment code | Active ingredient (rate, kg ai ha−1 or kg ae ha−1) | Trade nameb (rate) | Costa (NZ$ ha−1) |
|---|---|---|---|
clo/pic-L | Clopyralid/picloram (0.225/0.15) | Radiate (1.0 L ha−1) | 116 |
clo/pic-M | Clopyralid/picloram (0.45/0.3) | Radiate (2.0 L ha−1) | 220 |
clo/pic-H | Clopyralid/picloram (0.9/0.6) | Radiate (4.0 L ha−1) | 428 |
clo/tric-L | Clopyralid/triclopyr (0.75/0.15) | Versatill/Grazon (2.5/0.25 L ha−1) | 146 |
clo/tric-M | Clopyralid/triclopyr (1.5/0.3) | Versatill/Grazon (5.0/0.5 L ha−1) | 280 |
clo/tric-H | Clopyralid/triclopyr (3.0/0.6) | Versatill/Grazon (10.0/1.0 L ha−1) | 548 |
cpat-L | Clopyralid/triclopyr/picloram/aminopyralid (0.75/0.075/0.025/0.002) | Versatill/Tordon Brushkiller XT (2.5/0.25 L ha−1) | 146 |
cpat-M | Clopyralid/triclopyr/picloram/aminopyralid (1.5/0.15/0.05/0.004) | Versatill/Tordon Brushkiller XT (5.0/0.5 L ha−1) | 279 |
cpat-H | Clopyralid/triclopyr/picloram/aminopyralid (3.0/0.3/0.1/0.008) | Versatill/Tordon Brushkiller XT (10.0/1.0 L ha−1) | 545 |
fluro-L | Fluroxypyr (0.25) | Starane (1.25 L ha−1) | 64 |
fluro-M | Fluroxypyr (0.5) | Starane (2.5 L ha−1) | 115 |
fluro-H | Fluroxypyr (1.0) | Starane (5.0 L ha−1) | 218 |
terbu-L | Terbuthylazine (5.0) | Gardoprim (10 L ha−1) | 116 |
terbu-M | Terbuthylazine (10.0) | Gardoprim (20 L ha−1) | 220 |
terbu-H | Terbuthylazine (20.0) | Gardoprim (40 L ha−1) | 428 |
hexa-L | Hexazinone (3.0) | Velpar DF (4 kg ha−1) | 490 |
hexa-M | Hexazinone (6.0) | Velpar DF (8 kg ha−1) | 980 |
hexa-H | Hexazinone (12.0) | Velpar DF (16 kg ha−1) | 1960 |
Untreated | Untreated control | NA |