沂蒙山区,是著名的梨树之乡,子母梨、柿梨、天宝香、宝山酥等名特品种均原产于本区。临沂地区梨树栽培面积已达8320ha,年产量5300万kg。但近年来蚧虫危害日趋严重,虫株率已达15～20％。蚧虫导致树体衰弱,产量降低,品质变劣,重者枯枝甚至死树。摸清梨树蚧虫种类,掌握其优势种的发生习性,并采取综合 Yimeng Mountain, is a famous hometown of pear trees, pear, persimmon, Tianbao Xiang, Baoshan crisp and other famous species are native to this area. Linyi pear cultivation area has reached 8320ha, annual output of 5300 kg. However, in recent years, scale insects increasingly serious harm, insect strain rate has reached 15 to 20%. Scale insects cause tree decay, reduced yields, poorer quality, dead branches and even dead trees. Clumsy pest species to find out, master the occurrence of the dominant species habits, and to take an integrated