Mortality in Apis mellifera L. colonies in China from 2009 to 2013 THE RELATIONSHIP BETWEEN THE ULTRASTRUCTURE AND OCCURREANCE OF DRYING COLLAPSE IN THE WOOD FROM THINNED POPULUS DIVIDIANA TREES A STUDY ON CHANGE OF STRUCTURE OF COLLAPSED POPULUS DAVIDIANA SMALL-DIAMETER TIMBER AND MECHANISM OF COLLAPSE EFFECT ON COLLAPSE OF EUCALYPTUS WOOD BY HEAT TREATMENT Integrated matrix-hydrology-biological remediation technology for bank collapse lakeside zone of Chaohu Lake Spatio-temporal analysis of land use and ecological carrying capacity in coal mining city based on remote sensing STUDY ON MECHANISM OF DECREASING WOOD COLLAPSE BY PRE-FREEZING Recreation of agricultural ecosystem in collapsed area STUDY ON THE EVALUATING TARGETS OF WOOD COLLAPSE Identification of causal agent of watermelon collapse disease in Liaoning