We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Relative Susceptibility Among Arborvitae Cultivars to Arborvitae Leafminer, Argyresthia thuiella (Lepidoptera: Argyresthiidae).
- Authors
Miller, Fredric; Danielson, Donna
- Abstract
Eighteen Thuja species and cultivars were evaluated for ovipositional preference for, and relative susceptibility to, feeding by the arborvitae leafminer. Thuja occidentalis 'Hetz Midget' and 'Hoopesii' were least susceptible; T. occidentalis cultivars 'Gracilis', 'Holmstrup', 'Spiralis', and 'Techny', and T. plicata 'Fastigiata', were intermediate in susceptibility; Thuja occidentalis cultivars 'Aurea', 'Douglasii Aurea', 'Globosa', 'Hetz Wintergreen', 'Smaragd', 'Umbraculifera', 'Wagneri', 'Wareana,' and 'Waxen', and species T. occidentalis, and T. plicata, were highly susceptible to ALM feeding. Short trees suffered significantly less feeding compared to tall trees, with number of infested branch tips (IBTs) increasing with tree height. Short trees (<4 m) had significantly more feeding damage in the upper canopy zone and tall trees (>4 m) had greater damage in the lower and middle zones. Trees with very dense canopies had significantly fewer IBTs compared to trees with sparse, medium, and dense canopies, with IBTs decreasing as canopy density increased. There were no significant associations between number of IBTs and canopy aspect. Plant height, growth habit, and canopy zone and density appear to influence infestation levels and possibly ovipositional preference. These findings suggest some important ALM management guidelines for the nursery and landscape industries.
- Subjects
THUJA occidentalis; LEAFMINERS; ARGYRESTHIIDAE; PLANT canopies; OVIPARITY
- Publication
Arboriculture & Urban Forestry, 2017, Vol 43, Issue 6, p205
- ISSN
1935-5297
- Publication type
Article
- DOI
10.48044/jauf.2017.018