. Fig. 5.—Exanthema dieback of apple. larger twigs and branches to a certain extent, killing the bark and pro- ducing a sticky ooze upon the surface, but not so much as in blight of pear trees, which is the same bacterial disease. Both are caused by Fhy- tomonas amylovora. The Transcendent Crab and some varieties like Red Astrachan, Alexander, and Spitzenburg are very susceptible. Delicious, Gravenstein, Yellow Bellflower, and Yellow Newtown are more resistant. Treat as in pear blight (p. 101). Worthless apple trees which may har- bor blight in the vicinity of pear orchards should be removed.
. Fig. 5.—Exanthema dieback of apple. larger twigs and branches to a certain extent, killing the bark and pro- ducing a sticky ooze upon the surface, but not so much as in blight of pear trees, which is the same bacterial disease. Both are caused by Fhy- tomonas amylovora. The Transcendent Crab and some varieties like Red Astrachan, Alexander, and Spitzenburg are very susceptible. Delicious, Gravenstein, Yellow Bellflower, and Yellow Newtown are more resistant. Treat as in pear blight (p. 101). Worthless apple trees which may har- bor blight in the vicinity of pear orchards should be removed. Flat Limb.—In this condition, which is peculiar to the Gravenstein variety, the limbs have a flattened, ridged, twisted appearance on ac- count of unequal growth at different points in the circumference. On
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