. Class book of economic entomology [microform] : with special reference to the economic insects of the northern United States and Canada. Insect pests; Entomologie; Entomology; Insectes nuisibles, Lutte contre les; Insect pests; Insectes nuisibles. ,^68 ECONOMIC ENTOMOLOGY stage, and the small round red eggs can be readily recognized in the crotches of fruit trees. There are several generations in a season. In autumn it sometimes invades houses. Illk f m Family ; (Blister Mites) (Consult Bull 283, N. Y. Ag. E.\p. St.) Pear-leaf Blister Mites [Erhphyes pyri Pgst.).—This introduced
. Class book of economic entomology [microform] : with special reference to the economic insects of the northern United States and Canada. Insect pests; Entomologie; Entomology; Insectes nuisibles, Lutte contre les; Insect pests; Insectes nuisibles. ,^68 ECONOMIC ENTOMOLOGY stage, and the small round red eggs can be readily recognized in the crotches of fruit trees. There are several generations in a season. In autumn it sometimes invades houses. Illk f m Family ; (Blister Mites) (Consult Bull 283, N. Y. Ag. E.\p. St.) Pear-leaf Blister Mites [Erhphyes pyri Pgst.).—This introduced mite is responsible for the reddish or yellowish blisters on the leaves. Fig. 242.—Pear-leaf blister mite {Eriophyes pyri). (After Nalepa and Parrott ) of pear and apple. These blisters turn brown later in the season, and badly infested leaves drop. Nursery stock is often badly injure!. The mites live in colonies beneath the epidermis, forming blist. r- 'ike galls. Within these galls the minute oval white translucent ef;-- are laid and hatched, and the young mites grow to maturity. Th v then leave by a minute opening on the lower surface and go to n ». 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 Lochhead, William, 1864-1927. Philadelphia : P. Blakiston's Son
Size: 1284px × 1947px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectentomology, bookyear1
