. The American fruit culturist. imes their natural size and usuallyvery spongy and often hollow (see Fig. 289). The samefungus attacks the twigs sometimes so extensively as to de-stroy all the young branches. These affected tips becorne likethe young fruits above noticed, and dying give the tree an ap-pearance similar to that caused by the fire blight upon theapple. The pockets are often abundant during moist orwet springs, and some varieties seem more susceptible thanothers. Remedies.—Experimental tests for the control of this fungushave not been extensive, and while spraying may prove suc-ce
. The American fruit culturist. imes their natural size and usuallyvery spongy and often hollow (see Fig. 289). The samefungus attacks the twigs sometimes so extensively as to de-stroy all the young branches. These affected tips becorne likethe young fruits above noticed, and dying give the tree an ap-pearance similar to that caused by the fire blight upon theapple. The pockets are often abundant during moist orwet springs, and some varieties seem more susceptible thanothers. Remedies.—Experimental tests for the control of this fungushave not been extensive, and while spraying may prove suc-cessful it can only be suggested for trial. The fungus is ofthe same class as that causing the black knot, and like it mayrequire the heroic method of severe pruning. As the Exoascusattacks the young portions, the removal of the parts is an easiermatter than with the black knot, especially if the latter hasbeen upon the tree for some years. The Leaf Blight {Cylindrosporitim Padi Karst) produces brown 232 THE DISEASES OF Fig. 289.—Portion of Plum branch, show-ing both the normal fruit and the en-larged pockets due toOne. ExoascusPriefzt Fc\. (From Galloway.) patches upon the leavesand causes the prematurefalling of the foliage. Ingeneral appearance the workof this fungus resembles thatof the leaf blight of the pear. Remedies.—Fairly goodresults have been obtainedby the use of fungicides,and plum growers who sufferfrom a defoliation of theirorchards should see to itthat sprayings are resortedto, beginning early in theseason. The Scab (Cladosporiumcarpophiluni Thum.) is thesame as that upon the peachtreated above, to which thereader is referred. The Fruit Rot {Moniliafructigena Pers.) is also thesame as that of the peach,and is another illustrationof a common enemy to plantsthat are closely related. The Cherry.—Black Knot{Flowrightia morbosa Sacc.)of the cherry is the same asthat of the plum, and thepeculiarities of the speciesand method of treatmentneed not be agai
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