Abstract
The Mexican and Colombian biotypes of the egg parasitoid Edovum puttleri Grissell have similar rates of development under temperatures from 18 to 29°C. They require approximately 215 degree-days ( K ) above a developmental threshold ( t ) of 9.9°C. A biophysical model that simulates temperature–development relationships over a wide range of temperatures estimates that high temperature inhibition occurs between 31 and 32°C. Survival at 15°C was higher for the Mexican than the Colombian biotype. Under all temperatures tested, development was slightly (2 days maximum) faster under short daylengths than under long daylengths. The Mexican biotype offers two advantages to biological control programs: 1) its relatively high survival at 15°C may make it a better choice for release in potato-growing regions of the northern United States, and 2) it may provide genetic variability for selecting or breeding for improved tolerance to low temperatures.
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.
