Identification of pathogen of melon powdery mildew with 28S rDNA D1/D2 and ITS rDNA Classification of Tomicus Species The molecular genetic relationship between the pollinators of Ficus pumila var. pumila and Ficus pumila var. awkeotsang MOLECULAR GENETIC DIVERSITY OF PATHOGENIC FUNGAL GROUP CAUSING TREE CANKER Ⅱ——28S rDNA-PCR-RFLP AND RAPD ANALYSIS OF BOTRYOSPHAERIA SPP MOLECULAR GENETIC DIVERSITY OF PATHOGENIC FUNGAL GROUP CAUSING TREE CANKER Ⅰ. ——EVIDENCE OF TAXA FOR DOTHIORELLA, DOTHICHIZA,CYTOSPORA AND CONIOTHYRIUM IN MOLECULAR LEVEL Molecular Phylogeny of Some Longhorned Beetles Based on 28 S rDNA Sequences