Paragraph 17 Changes not yet applied. Later legislation changes this provision in ways not yet written into the text below: sch. 1 amended by Plant Health (Forestry) 1989 Mycosphaerella populorum G. E. Thomp. (Septoria musiva Peck), the cause of Septoria Canker of poplar. ← Paragraph 16 Paragraph 17 Paragraph 18 →