Plant Communication Through the Growing Media

The following link is to an article on plant communication using fungi in the soil.  It refers to an experiment where it was demonstrated that a plant being attacked by aphids could communicate with other plants around through the soil so that they could prepare for a potential aphid infestation. The trial demonstrates yet another symbiotic relationship between plants.  The ability of plants to communicate in this way would however not be useful for commercial cymbidium growers where plants are grown in separate pots or bags and where indoor growing conditions limit the entry of insects (wasps) to counter the aphid attack.  In wanting to make full use of biological pest control mechanisms different production techniques may need to be investigated which might include a greater reliance on post-harvest treatment to ensure that product is pest free before export.
http://www.bbc.co.uk/news/science-environment-22462855