. Fig. 196. — Bacterial blight of walnuts. After R. E. Smith. Two treatments with Bordeaux mixture, after thorough removal of diseased parts, have been known to prevent 50 per cent of the loss. ^ The second spraying should be given when the nuts are firmly set. Care should be taken to select resistant trees for propagation. WILLOW Tar spot (Rhytismose). See maple. Rust {Melampsora saliciscaprm (Pers.) Wint.). — Of tree rusts this is one of the most abundant, occurring as > Dept. Agr. Yearbook, p. 98, 1904.

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