A SIMULATION OF INTERSPECIFIC RELATIONSHIP BETWEEN WOOLLY APPLE APHID ERIOSOMA LANIGERUM (HAUS.) AND ITS PARASITE APHEL1NUS MALI (HALD.) 1 . THE COMPARATIVE STUDY OF BIOLOGY AND ECOLOGY OF WOOLLY APPLE APHID AND ITS PARASITE Natural control of Aphelinus malion Eriosoma lanigerumand the parasitoid’s overwintering protection measures Selectivity of Branches from the Various Apple Varieties by Eriosoma lanigerum with Volatiles from the Branches 鲁西南地区苹果绵蚜(Eriosoma lanigerum)及其天敌种群动态与群落结构特征