Fungous diseases of plants . es-ence of the fungus, unless the berries are attacked before they arehalf grown, when they may promptly shrivel and develop thepycnidia of the fungus. The fungus also affects the leaves, andwhen found upon these parts, brown spots, irregular in outline, 26o FUNGOUS DISEASES OF PLANTS are produced within which areas the pycnidia may be may also be affected. The fungus. The pycnidial stage is a characteristic Phoma orPhyllosticta, lOO to i20/x in diameter, as shown in Fig. are distributed over the affected surfaces, and produceabundant conid
Fungous diseases of plants . es-ence of the fungus, unless the berries are attacked before they arehalf grown, when they may promptly shrivel and develop thepycnidia of the fungus. The fungus also affects the leaves, andwhen found upon these parts, brown spots, irregular in outline, 26o FUNGOUS DISEASES OF PLANTS are produced within which areas the pycnidia may be may also be affected. The fungus. The pycnidial stage is a characteristic Phoma orPhyllosticta, lOO to i20/x in diameter, as shown in Fig. are distributed over the affected surfaces, and produceabundant conidia, which are hyahne, obovoidal, frequently trun-cated at the apex, measuring x 5-6/x. The conidia areappendaged, and they are expelled from the perithecium much asin the black rot of the grape. The ascogenous form is less com-monly found. In this the perithecia are much as those alreadydescribed, except that the wall is denser and they bear only latter are more or less clavate, with a total length of from.
Size: 1553px × 1608px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherbostonnewyorketcgi
