differences in density measures between treeazin® injected and non-injected ash wood
abstract
this undergraduate thesis explores an observation made by the city of thunder
bay’s urban forestry department staff of treeazin injected green ash tree’s limbs and
branches failing shortly after being injected. the objective of the study was to determine
whether or not treeazin injections were directly causing new woody growth to be less
structural, resulting in failing limbs and branches. for this study, four green ash street
trees were removed from the northwood neighborhood of thunder bay, two injected
and two not injected, to be tested for their mechanical properties. due to covid-19, and
the inability to access testing facilities, only density measures for each tree could be
obtained and tested. after statistical analysis of samples conditioned to 12% moisture
content, it was observed that injected samples all had higher density values than not
injected samples suggesting the failures were due to alternative factors. alternative
factors including environmental factors and quality of injection were discussed and
concluded to be the likely cause of branch failures in green ash trees in the city of
thunder bay.
collections
- undergraduate theses [325]