The Discovery and Verification of New Winter Hosts of Du-ensiform Gall Aphid,Kaburagia rhusicola Study on the Growth Characters of Kaburagia rhusicola Winter Host when Transplanted Outside of Origin Investigation on the Resources of Chinese Gallnuts in Shanyang County, Shaanxi Province STUDIES ON THE MORPHOLOGY, BIO ECOLOGICAL BEHAVIOUR AND ABUNDANT CHARACTERISTICS OF SPRING MIGRANT APHIS OF KABURAGIA OVATIRHUSTCOLA Photosynthetic characteristics of two plagiomnium mosses in Summer and Winter