To control codling moth in pear orchards, the primary alternative to organophosphate (OP) insecticide is pheromone mating disruption (MD). This technique is currently used in nearly all pear orchards in California. But there are problems with traditional pheromone dispensers: (1) unreliable emission rates, especially in the spring and (2) need for labor. These problems have been particularly acute on the North Coast with its cold springs and higher labor costs. A more efficient and reliable alternative to OPs for codling moth control has been needed.