. Fig. 19.*—Leaf -miner effect on photinia. The stem injury is often mistaken for a fungus canker. die with a withering of the leaves as in pear blight. Cutting out may be practiced as in the treatment described for cotoneaster on page 17. Heavy watering should be avoided up to blossom time. Leaf Blight, Leaf-Miner Effect.—The leaves are sometimes marked with lines and bands of white, scabby tissue. This is caused by very small maggots which feed between the two surfaces of the leaf. The bark of green shoots is also attacked (fig. 19). For control see the last sec- tion under this plant.

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Keywords: ., bo, bookcentury1900, booksubjectflowers, booksubjectplantdiseases