. Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . he pear blight,discussed on a later page under the pear. Cutting offand burning affected twigs is the best remedial measure. FUNGI AFFECTING THE PEAR The Pear Leaf=blight Entomosporium maculatum This is probably the most generally destructive fun-gous disease to wdiich the i^ear is subject. It appearsearly in spring, soon after the leaves develop, usually revealing its presence atfirst by minute, dull red-dish spots on the upper sur-face of the leaf. A li
. Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . he pear blight,discussed on a later page under the pear. Cutting offand burning affected twigs is the best remedial measure. FUNGI AFFECTING THE PEAR The Pear Leaf=blight Entomosporium maculatum This is probably the most generally destructive fun-gous disease to wdiich the i^ear is subject. It appearsearly in spring, soon after the leaves develop, usually revealing its presence atfirst by minute, dull red-dish spots on the upper sur-face of the leaf. A littlelater the spots appear onthe lower surface also, andthe reddish tint gives wayto brown, with a darkercenter. As the fungus de-velops the spots enlarge, in-volving more and more ofthe tissues of the leaf, untilthe tissues directly affectedwithin the spots, and thoseindirectly affected between, include nearly or quite theentire leaf, which appears sere and brown. Very youngleaves sometimes curl up, as a result of the attack. Thequince is also injured by this fungus, an infested leafbeing represented in Fig. 21. When leaves are badly. FIG. 21. QUINCE LEAF SHOWINGLEAF-BLIGHT.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
