Loading...
Please wait, while we are loading the content...
Similar Documents
Assessment of herbicides for selectively controlling broom (Cytisus scoparius) growing with Pinus radiata.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Trần, Hợp Harrington, Kerry C. Robertson, Alastair W. Watt, Michael S. Zydenbos, Sue M. |
| Copyright Year | 2010 |
| Abstract | Broom (Cytisus scoparius (L.) Link) is an invasive weed in many commercial radiata pine (Pinus radiata D.Don) plantations throughout New Zealand. As broom competes strongly with newly planted pine seedlings and has an abundant seed bank that persists longer than the forest rotation cycle, ongoing broom control is essential to prevent significant loss of production. A variety of herbicides are available to selectively control the established broom seedlings during the first year after planting pines but there is little published information describing which are safest for pines and most effective as the broom grows older. In this study, we evaluated the efficacy of six selective herbicides: (1) 450/300 g a.i. ha 1 clopyralid/ picloram, (2) 1500/300 g a.i. ha 1 clopyralid/triclopyr, (3) 1500/50/4/150 g a.i. ha 1 clopyralid/picloram/ triclopyr/aminopyralid, (4) 500 g a.i. ha 1 fluroxypyr, (5) 10 kg a.i. ha 1 terbuthylazine, and (6) 6 kg a.i. ha 1 hexazinone, applied at three rates (the recommended rate shown above, half this rate and double this rate) in controlling broom of various ages (3, 6, 9 and 12 months). Effects of these herbicides on 12-month-old P. radiata plants were also assessed, and all treatments were compared against untreated broom and pine plants. Broom seedlings were established from seed individually in 1.2 L planter bags of potting mixture at 3 monthly intervals prior to all plants being sprayed on 18 December 2008. Likewise, the pine seedlings were transplanted into planter bags as 9-month-old seedlings from a commercial nursery 3 months prior to spraying on the same date as the broom. All herbicide treatments were applied using a precision gas-powered plot sprayer at a rate equivalent to 300 L ha 1, and all treatments apart from the hexazinone were applied with an organosilicone surfactant. Damage to plants Assessment of herbicides for selectively controlling broom (Cytisus scoparius) growing with Pinus radiata |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://caws.org.nz/old-site/awc/2010/awc201013721.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
