. Injurious insects : how to recognize and control them . Insect pests; Insect pests. 308 FESTS OF ORCHARD AXD SMALL FRVITS stop to the insect. Or the fohage may be sprayed mth arsenate of lead as soon as the leaves are out. The Pear-leaf Blister-mite (Eriophyes pyri Pgst.) The leaves of apple and pear often are infested with a species of mite that burrows into the tissues of the leaf, causing a characteristic dis- coloration and swelling. Spots show in the upper leaf surface, at. Fig. 4/0.—Work of the Pear-leaf Blister-mite. Original. first redcUsh, but later turning bro\\Ti. At each spot the
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. 308 FESTS OF ORCHARD AXD SMALL FRVITS stop to the insect. Or the fohage may be sprayed mth arsenate of lead as soon as the leaves are out. The Pear-leaf Blister-mite (Eriophyes pyri Pgst.) The leaves of apple and pear often are infested with a species of mite that burrows into the tissues of the leaf, causing a characteristic dis- coloration and swelling. Spots show in the upper leaf surface, at. Fig. 4/0.—Work of the Pear-leaf Blister-mite. Original. first redcUsh, but later turning bro\\Ti. At each spot the leaf is some- what thickened and its surface is sUghtly raised. Sometimes the fruit also is attacked and chstorted. The mites themselves are very small. They hibernate under bud scales, migrating to the leaves as soon as the latter unfold, entering the tissue from the under side and feechng within. From time to time incli-\-iduals come out and move to new places, starting additional colonies and causing a continual increase in the number of spots. In late simmier they move l)ack again to the twigs, liiding away for 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 O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
