Impact of Erysiphe cynoglossi on the growth and reproduction of the rangeland weed Cynoglossum officinale.
Field surveys were carried out in Cranbrook, British Columbia, Canada, to determine the effect of E. cynoglossi on the growth and reproduction of C. officinale. Experiments were also carried out in gardens in Lethbridge, Alberta. Diseased plants had reduced seed set and also were smaller in size. E. cynoglossi infection also reduced the germination of seed and reduced nutlet number and size.