Diseases of economic plants (1921) Diseases of economic plants diseasesofeconom01stev Year: 1921 386 Diseases of Economic Plants CHESTNUT Bark-disease '' ' (Endothia parasitica (Murrill) A. & A.). — First noted in 1904 by Merkel in New York, this disease has spread with a rapidity and destructiveness with- out parallel in plant pathology. Its dis- tribution in 1918 is indicated in Fig. 205. The disease extended by natural agencies

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