This section is from the book "The American Garden Vol. XI", by L. H. Bailey. Also available from Amazon: American Horticultural Society A to Z Encyclopedia of Garden Plants.
A new peach tree enemy has appeared upon the Michigan lake shore in the shape of a fungus which attacks the young shoots, causing the trees to drop their leaves and the shoots to become discolored. Professor Taft thinks that the fungus is similar to the raspberry blight or anthracnose. His recommendations, in the Allegan (Mich.) Gazette, are as follows: "In case the trees are killed to the ground dig them out at once and burn them. If the branches only are dead, I would cut them back to short stubs, say from two to four feet from the tree trunk. I would then apply from a peck to a half bushel of unleached wood ashes (or twice the quantity of leached ashes). These should be applied broadcast over a space from eight to fifteen feet in diameter, according to the size of the tree. It will be well also to wash the trunk and stubs with a solution of green vitriol, say one pound to ten gallons of water. The orchard should be cultivated every two weeks until the middle of August. The disease generally occurs on trees that have been neglected and have not been cultivated.
"It is sometimes induced by late cultivation, which causes a second growth or prevents the proper ripening of the wood. No injury may be apparent the next spring, but, if a dry summer follows, the anthracnose may appear, and will so weaken the trees that they will not be able to withstand even a mild winter. By examining apparently healthy trees, you will find the last year's growth covered with light yellow spots. Whenever they are present the branch should be cut off and burned.
"This is in no way caused by insects, and it is nothing like yellows, although it may prove even more destructive than that disease after a dry period and under a slack system of cultivation".
 
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