Abstract
Colonies of Apanteles melanoscelus (Ratzeburg) from France, Yugoslavia, and Connecticut were crossed and photoresponse curves were obtained for the 3 strains and their hybrids under laboratory and outdoor insectary conditions. Photoperiodic responses of the Connecticut strain were different from the French and Yugoslavian parasites and their hybrid. The triple hybrid was different from the French, Yugoslavian, or Connecticut strains in its diapause characteristics. The laboratory-determined critical photophases at 24°C were: Connecticut, 16-17 h; the French-Yugoslavian-Connecticut hybrid, 15 h ; French, Yugoslavian and the French-Yugoslavian hybrid, 12.5-13.5 h. Under outdoor insectary conditions, the average percentage entering diapause for each strain was: Connecticut, 96%; a newly-collected French colony, 99%; a laboratory French colony, 8% ; Yugoslavian, 8% ; French-Yugoslavian hybrid, 7%; and French-Yugoslavian-Connecticut hybrid, 30%.
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.
