Abstract
Field studies were conducted in New Brunswick, Canada to evaluate the relationship between larval density of the spruce bud moth, Zeiraphera canadensis Mut. & Free. (Lepidoptera: Tortricidae), and damage to current year's shoots of white spruce, Picea glauca (Moench) Voss, and the response of white spruce, in terms of shoot production, in the year following damage. The length of undamaged shoots was closely related to the length of buds, the length of the previous internode, and shoot basal diameter. Basal diameter explained 78-94% of the variability in shoot length in the absence of herbivory and was chosen to estimate potential growth of damaged shoots. The number of larvae per shoot, shoot size, whether shoots were broken at a feeding scar, the amount of previous herbivory, and the position of damage along shoots explained 24-87% of the variation in six damage indices (i.e. area and percentage of shoots defoliated, area and percentage of cortical tissue consumed, percentage shoot length reduction and incidence of shoot breakage) examined over 2 years and at two sites (...)
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
