. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 434 ECONOMIC ZOOLOGY AND ENTOMOLOGY and winter will destroy many of the larvae and pupae that are in the ground. The Pear-leaf Blister-mite (Eriophyes pyri).—This little mite, that causes red blister-like blotches on the leaves of the pears and sometimes of the apples, is not an insect, as is commonly supposed, but is an Arachnid and is discussed on page 213. The Peach Borer (Sanninoidea exitiosa).—This insect is probably the most important of those that attack the trunk of orchard trees. Not only the peach but th
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 434 ECONOMIC ZOOLOGY AND ENTOMOLOGY and winter will destroy many of the larvae and pupae that are in the ground. The Pear-leaf Blister-mite (Eriophyes pyri).—This little mite, that causes red blister-like blotches on the leaves of the pears and sometimes of the apples, is not an insect, as is commonly supposed, but is an Arachnid and is discussed on page 213. The Peach Borer (Sanninoidea exitiosa).—This insect is probably the most important of those that attack the trunk of orchard trees. Not only the peach but the apricot, plum,. FIG. 207.—California peach-tree borer, larva of Sanninoidea opalescens, in cocoon. (About natural size.) prune and nectarine may be seriously affected by it. The eggs are laid on the outer bark near the base of the trunk. The larvae burrow in and feed on the inner bark usually close to the surface of the ground. Their presence is indicated by gummy exudations mixed with the castings of the larvae. Several larvae feeding on a tree may completely girdle it or so weaken it that it will bear little fruit and be much more subject to the attacks of other insects or diseases. Much of the sawdust- like castings and bits of bark are incorporated in the cocoon which the larva spins in the end of the burrow or on the surface of the tree, or in the ground close to the surface. The adult. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937; Doane, Rennie Wilbur, 1871-. New York, H. Holt and company
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