RT Journal Article
SR Electronic
T1 Discolored and Decayed Wood Associated with Injection Wounds in American Elm
JF Arboriculture & Urban Forestry (AUF)
JO JOA
FD International Society of Arboriculture
SP 230
OP 235
DO 10.48044/jauf.1977.060
VO 3
IS 12
A1 Shigo, Alex L.
A1 Campana, Richard
YR 1977
UL http://auf.isa-arbor.com/content/3/12/230.abstract
AB Dissection of 80 large American elm trees with a chainsaw revealed discolored and decayed wood associated with holes drilled for injections to control Dutch elm disease. Discolored wood was associated with every injection wound; injection wounds made in several successive years caused severe internal injuries. Until less injurious injection methods are developed, we suggest that injection holes be as small, shallow, clean-edged, and few as possible. Later injection sites should be at least 46 cm (18 in) above and not directly over older ones. If possible, drilling should be avoided at budbreak and in the valleys of fluted roots.