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杨跳象(Rhyncnaenus sp)1985年发现于山东临沂地区蒙阴县大王庄河滩杨树林内,危害小叶杨、八里庄杨及加拿大杨等。国内尚无报道。 一、形态特征 成虫体近椭圆形,长2.3—3mm,宽1.5mm;黑褐色,密生黄褐色纤毛。喙触角、足棕红色。喙长0.5—0.7mm,喙管向腹内弯曲,从背面看不到喙管。触角着生于喙基部近1/3处,触角11节,柄节最长,索节7节,第1索节为柄节长的2/3,其余各节较短而等长。锤节3节,
Rhyncnaenus sp was found in the poplar forest of the Wangzhuang River beach in Mengyin County, Linyi in Shandong Province in 1985, endangering Populus simonii, Pali poplar and Canadian poplar. There is no domestic report. First, morphological characteristics Adult body nearly oval, length 2.3-3mm, width 1.5mm; dark brown, densely yellow-brown cilia. Beak antennae, feet brown red. Beak 0.5-0.7mm long, beak tube bent to the abdomen, can not see the beak tube from the back. Tentacles were born at the base of the beak nearly 1/3 Department, antenna 11, the longest handle, cable festival 7, the first cable section for the length of 2/3 of the stem, the other sections shorter and equal length. Hammer Festival 3,