New Zealand Journal of Agricultural Research abstracts

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Nitrogen and boron fertiliser effects on Hieracium pilosella infestation

D. Scott
T. A. Jenkins

AgResearch
P.O. Box 60
Lincoln, New Zealand

Abstract  Foliar sprays of different nitrogen compounds promoted rather than inhibited Hieracium pilosella in the weeks following spray application on undeveloped tussock grassland. Continued annual granular applications promoted general vegetation growth to the detriment of H. pilosella in the absence of grazing. Single applications of boron at high rates had specific adverse effects on H. pilosella for up to 4–5 years, and possibly promotive effects on short-term grasses.

Keywords  Hieracium pilosella; N fertiliser; boron

A04088; Received 6 October 2004; accepted 27 October 2005; Online publication date 7 March 2006
New Zealand Journal of Agricultural Research, 2006, Vol. 49: 67–72
0028–8233/06/4901–0067 © The Royal Society of New Zealand 2006

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