Bush-fruits; a horticultural monograph of raspberries, blackberries, dewberries, currants, gooseberries, and other shrub-like fruits . name Nectria cinnabarina (TodeJ, is very common upon dead and decaying wood of differentkinds. Recently it has proved itself an injurious parasite uponliving currant bushes in New York and New Jersey, Its presenceis first manifest by wilting of the leaves and premature coloringof the fruit. The clusters are usually small and straggling, andboth fruit and leaves soon shrivel and fall. This is m turn fol-lowed by the death of the barren canes. In some c^i^e
Bush-fruits; a horticultural monograph of raspberries, blackberries, dewberries, currants, gooseberries, and other shrub-like fruits . name Nectria cinnabarina (TodeJ, is very common upon dead and decaying wood of differentkinds. Recently it has proved itself an injurious parasite uponliving currant bushes in New York and New Jersey, Its presenceis first manifest by wilting of the leaves and premature coloringof the fruit. The clusters are usually small and straggling, andboth fruit and leaves soon shrivel and fall. This is m turn fol-lowed by the death of the barren canes. In some c^i^es the entireplant dies; in others, some canes may partially escape. Some-times the plants die even before the leaves unfold, Eemedies.—This threatens to be a difficult enemy to fight. As THU CURB A NT TUBERCLE 437 with the red rust of the raspberry and blackberry, there is a per-ennial mycelium, living within the tissues of the plant. There is,therefore, no cure. To dig and burn the affected bush at once isthe only sure preventive against further spread. Mr. Durandfinds* that the mycelium may show no indication of its presence. :;^iji W-ii Fig. Leaf-spot. until long after entering the plant, and that the disease maytherefore be transmitted in apparently healthy cuttings. Thisbeing true, it follows that cuttings should not be used from afield known to be infected. Since the fungus develops so readilyin dead wood, the refuse from pruning should not be left in the field. *Loc. eit. 438 BUSH-FRUITS Currant Leaf-spot (Fig. 79) Septoria Eibis, Desm.—Order Sphasropsideae. Family Sphaerio- idese. Saccardo, Syll. Fung., 3 :491. Peck, Rep. N. Y. Mus., 38 :97. Martin,Jonr. Myc, 3:73. Pammel, Bulls. Iowa Exp. Sta., 13:45, 67.—17 :420.—30 :289. On Bibes ruhrum and E. nigrum. This disease produces a brown spotted appearance of theleaves, followed by their premature fall. Professor PammePs experiments at the Iowa Experiment Sta-tion have demonstrated conclusively that it can be contro
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