Depending on the uniformity of the site one or all three will be needed. In total, six or seven species are likely to be needed for the complete control of leafy spurge. In cleared forest near Guelph, ON, the leafy tying moth, Lobesia euphorbiana , has changed a plant community dominated by leafy spurge to a largely native community in which goldenrod is prominent. Photo P. Harris. Leafy spurge infestation in Saskatchewan.
Cypress spurge infestation in Ontario.
Photo P. Harris References 1. Best, K.F., G.G. Bowes, A.G. Thomas and M.G. Maw. The biology of Canadian weeds. Euphorbia esula L. Canadian Journal of Plant Science. Grover, R. and G.G. Bowes.