The Biology of Canadian weeds. 144. Pastinaca （加拿大的生物学杂草。）.pdf

The Biology of Canadian weeds. 144. Pastinaca sativa L. 1 2,5 2 3 Nancy Cain , Stephen J. Darbyshire , Ardath Francis , Robert E. Nurse , ´ 4 and Marie-Josee Simard 1Cain Vegetation Inc, 4 Spruce Blvd., Acton, Ontario, Canada L7J 2Y2; 2Agriculture and Agri-Food Canada, Eastern Cereal and Oilseed Research Centre, Wm. Saunders Bldg. #49, Ottawa, Ontario, Canada K1A 0C6; 3Agriculture and Agri-Food Canada, Greenhouse and Processing Crops Research Centre, 2585 County Rd. 20, RR# 1, Harrow, Ontario, Canada N0R 1G0; and 4Agriculture and Agri-Food Canada, Soils and Crops Research and Development Centre, 2560 Hochelaga Blvd., Quebec, Quebec, Canada G1V 2J3. Received 27 July 2009, accepted 2 December 2009. Cain, N., Darbyshire, S. J., Francis, A., Nurse, R. E. and Simard, M.-J. 2010. The Biology of Canadian weeds. 144. Pastinaca sativa L. Can. J. Plan tSci. 90: 217240. The parsnip, Pastinaca sativa, was introduced to North America shortly 1 1 after European se lemen tas an importan troot-crop. I tsubsequently escaped cultivation and naturalized as a less / 1 palatable ‘‘wild’’ form. Cultivation of parsnip has diminished in Canada to the poin twhere i tis now only a minor crop, bu 1 / the wild form has increased as a troublesome weed, particularly in eastern regions. 7 0 n Wild parsnip is mos tprevalen tin eastern Canada and th