Abstract
Paralobesia viteana (Clemens) (Lepidoptera: Olethreutidae) was reared on various varieties of grapes purchased on the fresh-fruit market or locally grown. The insect was reared continuously through 41 generations, with each generation requiring about 28 days at 25.5± 1.7°C and 16 hours of light per day. Under these conditions larvae did not diapause. Although the reproductive rate varied considerably from generation to generation a 4-fold population increase was commonly obtained. After 33 generations the productivity of the colony declined and although the rate improved in the 35th and 36th, later generations contained dominantly female moths. The progeny from females of the 41st generation mated with wild males were all females. While the method described permits large-scale rearing of the grape berry moth, it appears that continuous inbreeding eventually reduces the viability of the colony and requires new field material after some 30 generations.
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.
