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Researchers trap moths with plant-produced sex pheromone
Date:2/26/2014

MANHATTAN, Kan. A collaborative experiment involving a Kansas State University biochemist may mark the beginning of an effective, environmentally friendly plant-based method of insect control.

Timothy Durrett, assistant professor of biochemistry and molecular biophysics, was part of the collaboration that used various plant and moth enzymes to engineer plants that emitted sex pheromones that mimic those naturally produced by two species of moths.

The research recently appeared in the journal Nature Communications, "A plant factory for moth pheromone production." The study was led by Christer Lfstedt of Lund University in Sweden and also included researchers from the Swedish University of Agricultural Sciences.

Pheromones are chemicals released from the body of animals and insects that are used to attract mates or relay danger. Currently, insect pests are managed with pesticides and synthetic pheromones the latter of which confuse the insect and prevent it from breeding or enable it to be trapped.

"While these pheromones can be made chemically, it can be a toxic process to produce them," Durrett said. "What we demonstrated in this study is a more environmentally friendly approach that avoids the need to use toxic chemicals and eliminates hazardous byproducts from producing synthetic pheromones. The plant just handles everything."

The study focused on the bird-cherry ermine moth and the orchard ermine moth two insects that feed on the leaves of orchard trees and, as caterpillars, can strip trees of their bark.

Durrett helped the Swedish researchers use enzymes from plants and moths to create a biological pathway that made it possible for plants to produce the moths' sex pheromones. He contributed an enzyme from the burning bush plant that performed the final step in the synthesis process, essentially turning plants into pheromone production factories.

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Contact: Timothy Durrett
tdurrett@k-state.edu
785-532-3139
Kansas State University
Source:Eurekalert  

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