
          62

A. C. Glides, of Van Buren Co., Mich., thinks the disease
spreads in the direction of the prevailing wind from diseased
trees.  I doubt this! He says the disease  started at St.
Joseph, and spread east fifty miles in the time it was going
ten miles south.  Says it has progressed at the rate of one
township a year. p. 379.  Condition of Growing Crop. 1887.
Dept. of Agric., Washington D.C.

Me. A. G. Winchester, of Lake Shore Nursery, St. Joseph, says:
"It made its appearance here eighteen years ago [i.e. about
1869].  We do not know where it came from, or how [it was]
introduced."--Ibid. p. 378.

"The only fact in regard to its being communicated from 
one tree to another is that where one tree is attacked in an
orchard it will spread in from three to five years to every 
tree in the orchard.  I have never seen it eradicated after
the first trees were attacked, either by cutting out diseased
trees or by any other remedy, until all were gone.  The disease
first appeared in the centre of the peach belt eighteen 
years ago, and gradually spread north and south along the 
lake shore until there was not a healthy orchard left, and
but very few trees were set until five or six years ago, when
        