We are currently writing a training manual on wise use of insecticides and more – the challenges of dealing with weeds, diseases and insects. We are keen to take an ecological approach, starting with key features we can learn from rain forests (biodiversity, keep soil covered, minimal use of fire, recycle organic matter).
This link has an interesting discussion on the merits and issues to consider when choosing organic or synthetic pesticides.
And this link informs the reader relating to synthetic pyrethroids. Increased stability when in light is a key feature of the synthetics.
This link enables you to read the latest version (English) of a training guide for villagers who want to learn about pesticides. The download in the online library just shows the chapter on pesticides.