Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 16 January 1970:
Vol. 167. no. 3916, pp. 287 - 288
DOI: 10.1126/science.167.3916.287
Prev | Table of Contents | Next

Articles

Prevention of Metamorphosis by Exposure of Insect Eggs to Juvenile Hormone Analogs

Lynn M. Riddiford 1

1 Biological Laboratories, Harvard University, Cambridge, Massachusetts 02138

Metamorphosis of the bugs Pyrrhocoris apterus and Oncopeltus fasciatus is blocked by the application of juvenile hormone analogs to the eqgs 4 weeks earlier. One or more supernumerary larval molts occur to form "giant" larvae which routinely die without undergoing netamorphosis. When the corpora allatta were excised at the outset of the fifth larval stage, the entire phenomenon vanished and all individuals underwent normal metamorphosis. The inhibition of metamorphosis can therefoore be attributed to a continuation of the secretion of endogenous juvenile hormone by the corpora allata of mature larvae deried from eggs treated with juvenile hormone.

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)