. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. 42 INSECTS INJURIOUS TO THE APPLE. brooded, tlie first brood hatching in May, the second in September. As the oyster-shell bark-louse retains power of motion only for a few days at most after hatching, it is mainly disseminated to distant places by the distribution of young trees from infested nurseries. In the orchard and its immediate neighborhood it may be spread by being carried on the feet of birds, or attached Fig. to the larger insects, or may be aided by tlie wind in passing from tree t
. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. 42 INSECTS INJURIOUS TO THE APPLE. brooded, tlie first brood hatching in May, the second in September. As the oyster-shell bark-louse retains power of motion only for a few days at most after hatching, it is mainly disseminated to distant places by the distribution of young trees from infested nurseries. In the orchard and its immediate neighborhood it may be spread by being carried on the feet of birds, or attached Fig. to the larger insects, or may be aided by tlie wind in passing from tree to tree, while it is itself so brisk in its active state that it can travel two or three inches in a minute, and hence might in this way reach a point two or three rods distant be- fore it would perish. Although this insect essentially belongs to the apple-tree, it is frequently found on the pear, and sometimes on the plum and the currant-bush. Bemedies,—A species of mite (Fig. 31), Tyroglyphus mains (Shinier), preys on the louse as w^ell as on its eggs; and this mite, so insignificant that it can scarcely be seen without a magnifying-glass, has probably done more to keep this or- chard-pest within bounds than any other thing. Under the scales may sometimes be found a small active larva devouring the eggs. This is the progeny of a small four-winged parasite, belonging to the family Chalcididae, named Aphelinus mytilaspidis Le Baron. In Fig. 32 we have a representation of this insect highly 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 Saunders, William, 1836-1914. Philadelphia, J. B. Lippincott & Co
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherphila, bookyear1883
