. Diseases of fruits and nuts. Fruit; Nuts. Diseases op Fruits and Nuts 97 Bartlett is the principal variety affected, and the trouble appears chiefly on trees upon roots of the Japanese (Pyrus serotina) species or its hy- brids. Black end of pears seems very similar to blossom-end rot of toma- toes and some of the troubles of olives. The Japanese root for pears is undesirable on account of this Fig. 47.—Blast of pear on blossoms. Trees already on this root which are persistently bad with black end may be cured by inarching with French pear (Pyrus communis) seedlings and cutting off
. Diseases of fruits and nuts. Fruit; Nuts. Diseases op Fruits and Nuts 97 Bartlett is the principal variety affected, and the trouble appears chiefly on trees upon roots of the Japanese (Pyrus serotina) species or its hy- brids. Black end of pears seems very similar to blossom-end rot of toma- toes and some of the troubles of olives. The Japanese root for pears is undesirable on account of this Fig. 47.—Blast of pear on blossoms. Trees already on this root which are persistently bad with black end may be cured by inarching with French pear (Pyrus communis) seedlings and cutting off the connection with the original Japanese root after the inarches are well established. This is not very practical, however, on orchard trees. It is probably better to replace such trees with new ones on P. communis stocks. Those having resistance to fire blight (p. 105) are most desirable. Blast.—This bacterial disease may kill the dormant buds and occa-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Ralph E. (Ralph Eliot), 1874-1953. Berkeley, Calif. : The College of Agriculture, University of California
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