Show Prevention Is Best Cure for Black Knot of Plum 1 Slack lilack knot Is one of those diseases which ar are arlt cured by prevention The I only effective procedure Is to Inspect the plum trees trets closely In the fall tall or orI early winter and prune out all the I knots All the knots and pruned limbs must be burned to destro destroy the spores If any tree Is too badly Infested tomake to tomake tomake make the removal al of ot the knots tl hi e the entire tree tre should he de de- e- e The spores are carried In the wind so that It Is necessary to have ha the neighbors use the met method od outlined outline above to rid their trees r f t tl tilt a disease After th H. the snot knots have ha been pruned out It Is advisable nd to spray the trees with witha a rather strong solution of bordeaux mixture |