. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. 468 ENCYCLOPEDIA OF PRACTICAL HORTICULTURE concentric arrangement. Proceeding from the innermost cavities toward the edge of the spot the cavities become smaller, none at all being found near the edge of the diseased tissue. Upon sectioning through a diseased spot the flesh of the fruit is seen to be rotten, brownish and soft, not black or dry, a
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. 468 ENCYCLOPEDIA OF PRACTICAL HORTICULTURE concentric arrangement. Proceeding from the innermost cavities toward the edge of the spot the cavities become smaller, none at all being found near the edge of the diseased tissue. Upon sectioning through a diseased spot the flesh of the fruit is seen to be rotten, brownish and soft, not black or dry, as is the case with the volutella rot. Microscopic examination shows the dis- eased tissue to be thoroughly invaded with a thin branching mycelium. When this disease is upon twigs, the terminal portions of recent growth die, the bark shrinks and shrivels, turns black and at the line of demarkation between diseased and healthy tissue cracks. The general appearance of such a twig is much like that caused by the fire blight, but is readily distinguished by the pres- ence of very numerous, minute, pimple- like pustules, fruiting cavities distri- buted over the dead part. The significance of this fungus upon twigs is twofold: (1) As a cause of the twig blight; (2) as a source of infective material, spores, to transmit the rot to the fruit. Treatment Spraying coupled with careful pruning out and burning of diseased twigs and branches will doubtless serve as a means of control of this rot, both of branches and fruit. F. L. Stevens, West Raleiffh, N. C. Fruit Spot Phoma pomi Passer This disease is of very common occur- rence in New Hampshire and is found as far south as Maryland and Virginia and as far west as Michigan. It is not so destructive as the scab, but often causes otherwise perfect fruit to go as seconds. It is found on almost every variety of apple, but Baldwins and Tolman Sweets are especially susceptible. The disease appears about the middle of August. At this time it may b
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