Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . an extendedaccount of grape anthracnose. Since then it has beenfrequently treated of in The Journal of Mycology, andin experiment station bulletins and reports. FUNGI AFFECTING THE CURRANT AND GOOSEBERRY The Leaf=spot Disease Septoria ribis and Cercospora angulata The foliage of currants and gooseberries is oftenattacked early in summer by two or more species offungi, which produce small brownish spots, at first oftenno larger than a pin head, but gradually
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . an extendedaccount of grape anthracnose. Since then it has beenfrequently treated of in The Journal of Mycology, andin experiment station bulletins and reports. FUNGI AFFECTING THE CURRANT AND GOOSEBERRY The Leaf=spot Disease Septoria ribis and Cercospora angulata The foliage of currants and gooseberries is oftenattacked early in summer by two or more species offungi, which produce small brownish spots, at first oftenno larger than a pin head, but gradually increasing in size until a consid-erable proportion ofthe leaf surface isaffected. Some-times several spotsmay run together,forming a largeblotch; and theseblotches, as well asthe older spots, areoften of a dead graycolor. When theleaves are badlyattacked they fallprematurely,so thatthe bushes may be-00me as bare inFIG. 45. SPOT DISEASE OF cTTRRANTs. August as thcy Or-dinarily are in December. Of course, the effect plants of such a loss of foliage is disastrous. If aheavy crop is already hanging the plant may be unable 91. 92 rUl^GI AND FUXGICIDES to ripen it; and, in any case, it has no opportunity tostore up yitality for the coming seasons fruitage. The life-histories of the two S2:)ecies of fungi con-cerned in the attack do not seem to have yet been defi-nitely worked out. Sometimes the Cercospora is thecause of the disease, and sometimes the Septoria. Thespores apparently pass the winter in connection with thefallen leaves. Treatment.—Spraying with some fungicide, likethe ammoniacal copper carbonate solution, promises tobe a preventive of this disease. The first applicationshould be made^arly—soon after the leaves fully and burning, or composting the fallen leaves,will prove helpful in destroying the spores. In case theleaves are com2)osted, the resulting fertilizer should, ofcourse, be applied to some crop away from any currantor gooseberry b
Size: 1426px × 1752px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
