Invasive Species Compendium

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Abstract Full Text

Preliminary evaluation of salflufenacil herbicide for New Zealand forestry use.


Salflufenacil was tested to evaluate its activity against several crop and weed species. A hydroponic screening test demonstrated its herbicidal activity against radiata pine (Pinus radiata D.Don), gorse (Ulex europaeus L.) and broom (Cytisus scoparius (L.) Link) in comparison to terbuthylazine and metsulfuron-methyl. A small field trial showed that salflufenacil residues in soil did not affect radiata pine relative to controls at 2 or 4 weeks after 25-200 g a.i. ha-1 spray application. The same rates applied over radiata, regnans (Eucalyptus regnans F.Muell.) and nitens (E. nitens, H.Deane & Maiden) as well as gorse and buddleia (Buddleja davidii Franch.), caused relatively severe foliar and stem damage only to the eucalypt species. Foliage on the other species was affected temporarily but plants recovered within 8 weeks. The surviving eucalypts also recovered but more slowly. Field trials using salflufenacil sprays with metsulfuron-methyl, triclopyr and glyphosate products over mature gorse and broom, showed that it could provide rapid brown-out and at times enhance control of these weeds. The low use rates, physical and biological activity profiles and rapid degradation appear to make salflufenacil a potential forestry herbicide.