Effects of cold storage on adult emergence and fecundity of Choristoneura occidentalis (Lepidoptera: Tortricidae)
Abstract
The effects of cold storage on Choristoneura occidentalis Freeman pupae, in darkness at 2.0 ± 0.5°c and 100% R.H. for 0 to 10 weeks, were determined on adult emergence, adult longevity, the number of eggs laid per female, and egg viability in the laboratory. The proportion of adults emerging was not significantly reduced after pupae were stored in the cold room for up to 2 weeks. No adults emerged from pupae being stored for 8 weeks or longer. The lifespan of adult females was longer than that of males. The differences in adult longevity between the two sexes increased after pupae were exposed to cold storage. Cold storage of C. occidentalis pupae significantly reduced adult longevity: longer pupal storage resulted in a shorter adult lifespan. After 1 week of cold storage of the pupae, the mean number of eggs laid per female and egg viability were not significantly reduced as compared with those for females not exposed to cold storage as pupae. Egg production and egg viability, however, were significantly reduced when pupae were subjected to cold storage for 2 weeks or longer. Considering all the parameters measured, pupae may be exposed to cold storage for 1 week without deterioration in adult quality.
Key words: Choristoneura occidentalis; cold storage; adult longevity; fecundity
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).
