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Insect Physiology and Biochemistry by James L. Nation, Sr. is a nonfiction available to read on EtoBox.

What is Insect Physiology and Biochemistry about?

A beetle whose pheromone is evolving is Ips pini, the pine engraver. This insect is a major tree killer in the Great Lakes area of the United States, in California and Idaho. Males locate a new host pine tree, bore into the phloem layer, feed, and release a blend of several chemical components. A major component is ipsdienol, with a chiral center. California and Idaho populations are attracted to \(R-(-)\)-ipsdienol, and attraction is reduced if \(S\)-(+)-ipsdienol is also present. New York populations are attracted to a 50:50 blend of \(R-(-)\)-ipsdienol and \(S-(+)\)-ipsdienol. Beetles from Wisconsin respond preferentially to a 75:25 mixture of \(S-(+)\) and \(R(-)\) ipsdienol. These differences in attraction and in production of pheromone components involve genetic differences in the three populations. What could be driving these changes? One possible answer is predation pressure. Two predatory beetles are attracted to the pine engraver pheromone, and they aggressively attack and eat the I. pini. Both predators show strong preference for attraction to a mixture of \(25 \% S-(+)\) plus \(75 \% R-(-)\)-ipsdienol. Populations may be evolving aggregation pheromone blends that are le

Who reads Insect Physiology and Biochemistry?

Author

James L. Nation, Sr.

Publisher

CRC Press

Published

2022

Language

EN

ISBN

9780367653644

Category

nonfiction

Subjects

Science, Chemistry, Nature