. Injurious insects : how to recognize and control them . Insect pests; Insect pests. Fig. 4S1.—The Apple Leaf-hopper. Enlarged and natural size. Orig- inal. early in the season, before the stock a desirable ptreventive mea Fig. — Work of the Apple Leat- hopper. Original. the foliage a distinctly bleached ai> especially on nursery stock, the at- tack usually results in a curling of the tender leaves, somewhat resembling the work of plant lice. The insect winters partly as adults in rubbish, partly as eggs in the bark of the trees. There are se^'eral generations in the coiu'se of the su
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. Fig. 4S1.—The Apple Leaf-hopper. Enlarged and natural size. Orig- inal. early in the season, before the stock a desirable ptreventive mea Fig. — Work of the Apple Leat- hopper. Original. the foliage a distinctly bleached ai> especially on nursery stock, the at- tack usually results in a curling of the tender leaves, somewhat resembling the work of plant lice. The insect winters partly as adults in rubbish, partly as eggs in the bark of the trees. There are se^'eral generations in the coiu'se of the summer. In orchard trees spra^^ng with a contact insecticide, such as tobacco extract, vriW kill many of the leaf- hoppers if the material is applied winged stage appears. On nursery sm^e is dipping in soap solution. The Pear Psylla (P.^\)///(7 ;);/r(Vo/(7 Foerst.) The pear psylla is a minute, sucking insect, wingless in its immature stages, but active and winged as an adult. It sucks the juices of the. 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
