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Controversial Trial of Genetically Modified Wheat Ends In Disappointment
sciencehabit writes: A controversial GM wheat trial has failed after more than £2 million of public money was spent protecting it from GM opponents. Researchers had hoped that the wheat modified to produce a warning pheromone would keep aphids away and attract their natural enemies, reducing the need for insecticides. Despite showing promise in the laboratory, the field trial failed to show any effect. “If you make a transgenic plant that produces that alarm continuously, it’s not going to work,” ecologist Marcel Dicke of Wageningen University in the Netherlands says. “You have a plant crying wolf all the time, and the bugs won’t listen to it any longer.”
I would agree with the "cry wolf" assessment. Having worked in pest control in my experience pheromones don't work well and/or very long; about the only good use I've found is for monitoring. I once talked to a Chemistry professor working with an Entomologist to synthesize fire ant trail pheromones (how they make paths to food) to see if it could be used to confuse workers. He told me it worked for all of a few minutes before they "figured it out" and started trailing through it like nothing happened. Smell is the primary sense for most insects and can be extremely acute (some moths can sense a few MOLECULES per square foot), so I think it will be relatively difficult to find a way to trick them in that way.
I'm glad they're trying new things, we're ganna need it along with intelligent usage so we don't end up needlessly wasting away their effective life-spans like we've done with previous pesticides and anti-biotics. Shelf what doesn't work but continue encouraging innovation (which I think the current gene patent situation is probably stifling)