Feel free to visit the following links which have lots of good information on  agro-ecology and related subjects, including the sustainability of agricultural ecosystems, plant protection, pest management, and the biological control of pests.  To exchange links, please email  info@agro-ecology.org.  

Managed by Martin Burger, the Sustainable Agriculture Farming Systems (SAFS) is a
collaborative effort between UC researchers and farmers comparing the dynamics of conventional and organic farms.

http://safs.ucdavis.edu

Bioversity International is a global non profit organization, working on projects involving the use and conservation of agricultural biodiversity.

http://www.bioversityinternational.org