Steve Belmain and Phil Stevenson from the Natural Resources Institute in the UK describe how farmers' indigenous knowledge has improved grain storage practice through botanical pesticides and how it can be optimised through understanding the modes of action of the active components.
Belmain, S.R.; Stevenson, P.C. Ethnobotanicals in Ghana: reviving and modernising age-old farmer practice. Pesticide Outlook (2001) 12 (6) 233-238. [DOI: 10.1039/b110542f]