Editing Arceuthobium (section)

==Dwarf mistletoe rating system==
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A standardized system called the Hawksworth 6-class '''dwarf mistletoe rating''' ('''DMR''') '''system''' has been devised to determine how much dwarf mistletoe has infected a tree. To use this system, the living part of the [[crown (botany)|tree crown]] needs to be broken up into 3 sections, (top, middle, bottom). Each section is then rated either 0, 1, or 2 with a score of 0 being assigned for a uninfected section, 1 for light infection with fewer than half of the branches infected, or 2 for heavy infection with over half of the branches infected.  The 3 numbers are then added together to give the total rating for the tree.<ref>{{cite web |title=Management guide for dwarf mistletoe |url=http://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5187427.pdf |access-date=25 July 2016 }}</ref>