Reversal of embryonic diapause in the Australian plague locust, Chortoicetes terminifera (Walker), by temperatures above the development threshold |
| |
Authors: | P Gregg |
| |
Institution: | Department of Agronomy and Soil Science, University of New England, Armidale, N.S.W. 2351, Australia |
| |
Abstract: | Diapause was induced in embryos of Chortoicetes terminifera (Walker) by transferring adults from an L:D 15:9 regime to an L:D 12.5:11.5 regime. When incubated at 20°C all eggs in all pods entered and remained in diapause but when incubated at 26, 32 and 38°C a proportion of eggs in some pods did not. Pods incubated at 32°C for up to 6 days, when diapause intervenes and then transferred to 20°C gave the same result as pods incubated at 20°C throughout development. All eggs entered and remained in diapause. If the period at 32°C was extended to 8 days, the proportion remaining in diapause was not significantly different from that found when pods were incubated at 32°C throughout development. In eggs which broke diapause at 32°C there was a pause or slowing down of development for about 2 or 3 days around the stage at which diapause intervenes. |
| |
Keywords: | Diapause temperature plague locust |
本文献已被 ScienceDirect 等数据库收录! |
|