Abstract
Abstract Temperature/development relationships in bluegreen lucerne aphid, Acyrthosiphon kondoi Shinji, were studied at 5 constant temperatures between 6°C and 30°C using aphids held individually in stem cages. All biological variables recorded showed strong associations with temperature. Reproduction was clearly modified by temperature, increasing temperature reducing the pre-oviposition period, total reproductive period, and total number of progeny produced; maxima were at 11°C for these variables. No aphids survived at 30°C, and at 25.5°C there was limited reproductive success. There were generally 4 instars, but up to 15% of aphids went through 5 instars. Development rate showed a linear relationship with temperature between 6°C and 20.5°C; extrapolation indicated a lower threshold for development of 2.63°C. Using this threshold value, developmental comparisons expressed in terms of physiological time (day degrees, D°) showed that all instars were similar in duration (38.4 D° each). The rate of genera...
Sign-in/Register to access full text options 
Free) 
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 call
