. Diseases of flowers and other ornamentals. Flowers; Plant diseases. :-. Fig. 16.—Nasturtium leaves affected with spotted wilt. neta, which is the cause of the very common similar disease of the syca- more tree, seems to be responsible for this condition. A number of other leaf spot or blight fungi occur on oaks in California. For control, see the last section under this tree. Leaf Blister, Curl Leaf.—Symptoms of this disease are roundish, swol- len, blisterlike patches on the underside of the leaves, and corresponding yellowish areas on the upper side. These spots finally die and if badly af
. Diseases of flowers and other ornamentals. Flowers; Plant diseases. :-. Fig. 16.—Nasturtium leaves affected with spotted wilt. neta, which is the cause of the very common similar disease of the syca- more tree, seems to be responsible for this condition. A number of other leaf spot or blight fungi occur on oaks in California. For control, see the last section under this tree. Leaf Blister, Curl Leaf.—Symptoms of this disease are roundish, swol- len, blisterlike patches on the underside of the leaves, and corresponding yellowish areas on the upper side. These spots finally die and if badly affected by the fungus (Taphrina coerulescens), the leaves may fall, more or less defoliating the tree. For control, see the last section under this tree. Leaf Spot.—The leaves are often marked with dead spots, which some- times cause defoliation. Many different fungi have been reported on oaks in California as having this effect, but none is sufficiently important to warrant special treatment here. For control, see the last section under this tree. Oak-Root-Fungus Disease, Armillaria Root Rot.—Affected trees die or are weakened and break over from a rotting of the roots and base of the trunk. Large clumps of light-brown toadstools come up around the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Ralph E. (Ralph Eliot), 1874-1953. Berkeley, Calif. : College of Agriculture, University of California
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Keywords: ., bo, bookcentury1900, booksubjectflowers, booksubjectplantdiseases
