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    ABSTRACT

New Zealand Journal of Forestry (1973) 18(2): 279–284
©New Zealand Institute of Forestry

Research article
The release of Pinus radiata from bracken with asulam

A.G. Wasmuth



The herbicide asulam was evaluated, in a number of widely distributed trials, for releasing radiata pine seedlings from bracken. Following application to small plots, assessments over 18 months showed that asulam suppressed bracken sufficiently to allow the trees adequate growth in their first season after planting. Large-scale trials applying asulam by air confirmed that bracken can be adequately suppressed provided that treatment is applied at the correct stage of frond development — when fronds are partially unfurled in late spring-early summer. In no case was radiata pine damaged.
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