. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. 450 DISEASES OF CULTIVATED PLANTS ** Spores i-fnany-sepfate PESTALOZZIA (De Not.) Pustules minute, erumpent; conidia oblong, 2-many-septate, central cells coloured, end ones hyaline, apical cell bearing T-many hair-like A "i^ KiG. 137.—Fcslalozzia ^^uepiiii. i, blotches caused by the fungus on a tea leaf; 2, conidia oi" fungus, highly mag. Grey blight of tea plant {Pestalozzia guepitii, Desm.) is said by Sir George Watt to be one o
. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. 450 DISEASES OF CULTIVATED PLANTS ** Spores i-fnany-sepfate PESTALOZZIA (De Not.) Pustules minute, erumpent; conidia oblong, 2-many-septate, central cells coloured, end ones hyaline, apical cell bearing T-many hair-like A "i^ KiG. 137.—Fcslalozzia ^^uepiiii. i, blotches caused by the fungus on a tea leaf; 2, conidia oi" fungus, highly mag. Grey blight of tea plant {Pestalozzia guepitii, Desm.) is said by Sir George Watt to be one of the most destructive and dangerous parasitic fungi that attack the tea plant. It occurs in Assam and Cachar, and probably wherever tea is grown in India and Ceylon. The disease first appears as minute, brownish-grey spots on the upper surface of the leaf; these spots gradually increase in size and often coalesce, forming large, irregular blotches which become grey, and are sprinkled with minute, black points, the fruit of the fungus. During the increase in size the blotches are often bordered with a dark, slightly raised line. Diseased leaves are not at all blistered or swollen, in fact the diseased patches shrink a. 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 Massee, George, 1850-1917. New York : Macmillan
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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
