. Fig. 20.—Leaf spot on photinia. be identical in the two hosts. For control see the last section under this plant. Scab.—Small spots of brown, velvety, fungus growth appear on the leaves (fig. 21), flower stalks, and green berries, and disfigure the latter when mature. This fungus, Fusicladium photinicola, is very similar to those causing scab on apple, pear, loquat, and other pomaceous hosts, but the ones on different hosts appear to be of different species, so that cross-infection does not occur. For control see the last section under this plant. Thrips Effect.—A bad stunting, curling, and
. Fig. 20.—Leaf spot on photinia. be identical in the two hosts. For control see the last section under this plant. Scab.—Small spots of brown, velvety, fungus growth appear on the leaves (fig. 21), flower stalks, and green berries, and disfigure the latter when mature. This fungus, Fusicladium photinicola, is very similar to those causing scab on apple, pear, loquat, and other pomaceous hosts, but the ones on different hosts appear to be of different species, so that cross-infection does not occur. For control see the last section under this plant. Thrips Effect.—A bad stunting, curling, and deformity of the leaves toward the ends of the shoots is caused by minute insects, Tiothrips ilex, feeding in the terminal growth. For control see the last section under this plant.
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Keywords: ., bo, bookcentury1900, booksubjectflowers, booksubjectplantdiseases
