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apple blotch

Field experiments in spraying apple orchards for the control of apple blotch

By A. J. Gunderson

Spraying for prevention of apple blotch and apple scab

By F. H. Ballou

The control of apple blotch

By D. E. Lewis

Apple blotch

By John W. Roberts,Leslie Pierce

Phyllosticta leaf spot, fruit blotch, and canker of the apple

By Emil Frederick Guba

Apple blotch

By W. M. Scott,James Birch Rorer