. Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . may start any-where upon the surface. Itgradually spreads from the \point of infection through-out the tissues, causingbrown and decayed spots asit progresses. The larger fig. i6. apple affected by bit-fruits usually fall to the ^^^^ ^^ yungvs, showing •^ BLACK PUSTULES ON ground, but many of the the skin. smaller ones shrivel up and remain on the tree in amummified condition. Great quantities of spores aredeveloped on these withered ^^Miangers-on, and by
. Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . may start any-where upon the surface. Itgradually spreads from the \point of infection through-out the tissues, causingbrown and decayed spots asit progresses. The larger fig. i6. apple affected by bit-fruits usually fall to the ^^^^ ^^ yungvs, showing •^ BLACK PUSTULES ON ground, but many of the the skin. smaller ones shrivel up and remain on the tree in amummified condition. Great quantities of spores aredeveloped on these withered ^^Miangers-on, and bymeans of them the disease is started again the followingspring-. The fungus seems to be more destructive dur-ing damp weather. Professor H. Garman expresses theopinion that this disease causes greater loss in Kentuckythan any other enemy of the orchardist. ^^It is nouncommon thino^ for three-fourths of all the fruit on atree to be rendered worthless by its attacks. In thelatter part of summer we find, in many orchards, theground covered with well grown apples, suitable for mar-keting, as far as size and maturity are concerned, yet3. 34: rUXGI AXD FUNGICIDES not worth gathering up because of the rot with whichthey are wholly or in part affected/ Other southernstates suffer equally serious losses. One orchard inArkansas has been rej^orted in which, in 1887, tlie attackof the funsfus was so severe that seventv-fiye trees ^^eldedless than twenty-fiye bushels of fruit. A photographicview of one of the depressed rotten spots as it appears onthe maturing fruit is shown in Fig. 17. This disease is distinguished after it has becomewell established by the jDresence of small blackish pus-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
