Giant buttercup (<i>Ranunculus acris</i> L) seedling emergence and survival in Golden Bay dairy pastures


  • C.S. Lusk
  • S.L. Lamoureaux
  • G.W. Bourd?t



Giant buttercup (Ranunculus acris L) is an unpalatable weed in New Zealand dairy pastures and is estimated to cost the dairy industry over 150 million annually in lost milk solids revenue In this study the survival of giant buttercup seedlings was determined by following their fates in permanent plots on eight randomly selected dairy farms in the Takaka Valley from November 2004 to August 2008 Seedling emergence occurred yearround but tended to be higher in winter and spring than in summer and autumn Seedling survival was very low with less than 5 of seedlings surviving beyond 12 months Seedlings that germinated in autumn had significantly higher survival at 6 and 12 months (22 and 12 respectively) than seedlings germinating in spring summer and winter (37 and 23 respectively) Good pasture management that prevents overgrazing and pugging in autumn and winter should reduce the autumn flush of seedlings and minimise their survival




How to Cite

Lusk, C., Lamoureaux, S. and Bourd?t, G. 2009. Giant buttercup (&lt;i&gt;Ranunculus acris&lt;/i&gt; L) seedling emergence and survival in Golden Bay dairy pastures. New Zealand Plant Protection. 62, (Aug. 2009), 222–227. DOI:




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