PHEROBANK of Plant Research International, part of Wageningen UR, has synthesized the pheromone of the pistachio twig borer. The pheromone molecule consists of two mirror images, socalled enantiomers. Tests in Iran have shown that only one of those enantiomers is attractive to the pistachio twig borer whereas the other has a negative effect on activity. The dispenser should therefore be filled with the naturally pure form of the pheromone which is unfortunately much more expensive than the (racemic) mixture containing both enantiomers of the molecule.
Iranian company that has tested the attractant is enthusiastic and has meanwhile placed a large order with PHEROBANK. Companies in Turkey are expected to be interested as well.
Use of the pistachio twig borer pheromone can result in a considerable reduction in the use of chemical pesticides.
More information about availability and prices: www.pri.wur.nl/UK/products/Pherobank/
Willem Stol
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