Cornicle

In today's world, Cornicle has become a topic of great importance and interest to a wide spectrum of people. From amateurs to experts, Cornicle has captured attention and generated debate in multiple areas of society. Its impact has transcended geographical and cultural barriers, being the object of study and analysis in different disciplines. In this article, we will explore various aspects related to Cornicle, from its origin and evolution to its implications and possible future developments. Whether it is a historical phenomenon, a relevant figure or a current topic, Cornicle represents a meeting point for the exchange of ideas and knowledge, and it is necessary to understand it in its entirety to contextualize its relevance in our society.
Aphid excreting defensive fluid from the cornicles
Cornicles

The cornicle (or siphuncule) is one of a pair of small upright backward-pointing tubes found on the dorsal side of the 5th or 6th abdominal segments of aphids. They are sometimes mistaken for cerci. They are no more than pores in some species.

These abdominal tubes exude droplets of a quick-hardening defensive fluid containing triacylglycerols called cornicle wax. There is some confusion in the literature about the function of the cornicle wax secretions. It was common at one time to suggest that the cornicles were the source of the honeydew, and this was even included in the Shorter Oxford English Dictionary and the 2008 edition of the World Book Encyclopedia. There also is documentation in the literature for cornicle wax luring predators in some cases.

References

  1. ^ Aphid, Henry G. Stroyan, McGraw-Hill Encyclopedia of Science and Technology, 8th Edition, 1997, ISBN 0-07-911504-7
  2. ^ Edwards, John S. (1966). "Defence by Smear: Supercooling in the Cornicle Wax of Aphids". Nature. 211 (5044): 73–74. Bibcode:1966Natur.211...73E. doi:10.1038/211073a0. S2CID 4295930.
  3. ^ Aphid, Candace Martinson, World Book Encyclopedia, 2008, ISBN 978-0-7166-0108-1
  4. ^ Grasswitz, Tessa R.; Paine, Timothy D. (1992). "Kairomonal effect of an aphid cornicle secretion on Lysiphlebus testaceipes (Cresson) (Hymenoptera: Aphidiidae)". Journal of Insect Behavior. 5 (4): 447–457. doi:10.1007/BF01058190. S2CID 25298742.


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