Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . url Taphrina deformans It often happens that in spring, soon after theleaves begin to expand, the foliage of peach trees be-comes curled and misshapen. Theleaves are usually thickened anddiscolored, and fall off in a shorttime. All the branches may beattacked, or the injury may beconfined to only a part of the the disease is severe theyoung fruits fall off, and the cropfor the year is destroyed. Thedefoliated trees soon push out auew set of leave
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . url Taphrina deformans It often happens that in spring, soon after theleaves begin to expand, the foliage of peach trees be-comes curled and misshapen. Theleaves are usually thickened anddiscolored, and fall off in a shorttime. All the branches may beattacked, or the injury may beconfined to only a part of the the disease is severe theyoung fruits fall off, and the cropfor the year is destroyed. Thedefoliated trees soon push out auew set of leaves, but too late torepair the damage done to thefruit crop. This leaf-curl is most injuri-ous during wet springs. It oftenruins the peach crop over largeareas. It is uncertain in itsattacks, and comparatively littleis known of tlie life-history of thefunous which causes it. If a thin section of one of theswollen leaves be placed under ahigh power of the microscoi^e, theFIG. 36. TEACH LEAF-CURL, threads of thc myccliiim of thefungus can be seen between the leaf cells, and sometimesextending through them. The mycelium is most abund- 67. 68 FUXGI A^sD FUNGICIDES ant just beneath the outer skin, and it pushes outthrough the skin numerous spore-sacs, each contain-ing a half dozen or more spores. These spores are sup-posed to spread the disease to other peach leaves, but asstated above, very little is known of the life-history ofthis fungus. Treatment.—Xo practical remedy for this diseasehas yet been found. The removal and burning of dis-eased leaves, whether on the tree or ground, is commonlyrecommended; and spraying the trees early in spring,before the leaves expand, with some of the fungicides,has been suggested. The latter method is worthy oftrial. Literature.—The peach leaf-curl is very frequentlymentioned in our horticultural literature, but few im-portant articles concerning it have been published. Thebest popular discussion that has come to my notice is inProfessor Lamson-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
