Has anyone else seen this news article?

http://www.stuff.co.nz/southland-tim...n-pest-control

The training process is very 'hands-on'. Individual bees are taught to detect chemical compounds in caterpillar spit, in particular the light brown apple moth caterpillars. I assume they then release the trained bees and observe their behaviour around the apple trees.

That's a lot of effort, considering the life span of each bee. I'm struggling to see a long term commercial benefit. Any thoughts?