Sexual biology of Pandemis pyrusana (Lepidoptera: Tortricidae) under laboratory conditions
Abstract
Laboratory studies were conducted to characterize some aspects of the sexual biology of Pandemis pyrusana Kearfott. Both males and females were sexually active during their first scotophase. Virgin females held at 22°C started calling the first night 4 - 5 hrs into scotophase. Calling by virgin females occurred earlier and continued longer into scotophase after the first night. Mating lasted 3 - 4 hrs and both sexes mated only once per evening. Calling frequency by mated females was lower than for virgins and dropped off sharply after 2 nights. Forty percent of females mated more than once during the 6-day test. Males mated on consecutive scotophases, but the percentage of subsequent copulations passing a spennatophore declined with age. Oviposition occurred throughout a diurnal cycle, but was concentrated during early scotophase. Females laid an average of four egg masses from which 219 larvae eclosed. Egg mass size, number of larvae emerging, and the number of larvae emerging per egg mass area declined with subsequent egg masses.
Key words: Pandemis; leafrollers; apple; sexual behaviour
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).
