註釋 Eastern spruce dwarf mistletoe (Arceuthobrium pusillum) (ESDM) is a native dwarf mistletoe in Minnesota. It is a parasitic plant that damages black spruce (Picea mariana) through branch distortions known as witches' brooms, and leads to increased mortality and reduction in regeneration success. Treatments for ESDM involve removal of infested trees, which is typically done utilizing a clearcut. While ESDM has been managed for decades in black spruce stands in Minnesota, little is known about the effectiveness of the management approaches. This research is part of an interdisciplinary study to increase detection and management options for ESDM. This piece of the research was a qualitative assessment of loggers' and timber sale foresters' knowledge and perceptions of effectiveness of current ESDM management practices in black spruce. Five research questions were examined: 1) Can foresters and loggers identify ESDM? 2) Do foresters and loggers understand the need to eradicate ESDM where timber production is the objective? 3) Are the eradication treatments implemented as designed? 4) Are there impediments to implementing management treatments? and 5) Are the treatments effective? Data were gathered through in-depth interviews and focus groups with loggers, as well as focus groups with timber sale foresters, in the study area. 