New Zealand Journal of Ecology (1987) 10: 67- 76

The Ecology of Ragwort (Senecio jacobaea)—a Review

Research Article
D. A. Wardle 1,2
  1. Ruakura Soil & Plant Research Station, Ministry of Agriculture & Fisheries, Private Bag, Hamilton, New Zealand
  2. Present address: Department of Biological Science, 2500 University Drive, N.W., Calgary, Alberta, Canada T2N 1N4

The available literature on ragwort is reviewed. The ecological behaviour of ragwort can be explained by its tendency to act as a colonising plant, which is encouraged by pasture disturbance. Ragwort-infested pasture and closed pasture alternate with each other, and this is influenced by a number of environmental and management factors.