Developmental threshold for the striped ambrosia beetle <i>Trypodendron lineatum</i>: a first estimate
Abstract
We estimated the threshold temperature for development of Trypodendron lineatum (Oliv.). Western hemlock logs were inoculated with reproductively active beetles. Beetles developing inside them were reared in temperature controlled chambers at 18, 20, 25 and 30°C. Similar logs were set up outdoors. The outdoor, 25 and 30°C logs were replaced with field attacked logs when the inoculated beetles failed to establish. Sample disks were cut from each log every 6 days and dissected to fmd the number of all life stages. Beetles reared at 25 and 30°C developed more slowly than those outdoors or at 18 or 20°. Development rates in the 18 and 20°C chambers were used to calculate a threshold temperature of 13°C. We estimated that brood and parental beetles would emerge from the logs after accumulation of 265 degree-days above the 13°C threshold.
Key words: Ambrosia beetles; degree-day; development; forestry; inventory management; IPM; threshold temperature; Trypodendron lineatum
Downloads
Issue
Section
License
Authors who publish with the Journal of the Entomological Society of British Columbia agree to the following terms:
-Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
-Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
-Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
