Commodity Groups:

North Harvest Bean: http://www.northarvestbean.org
Northern Pulse Growers Association: http://www.northernpulse.com/
USA Dry Pea and Lentil Council: http://www.pea-lentil.com/

Professional Associations:

American Phytopathological Society: http://www.apsnet.org
Canadian Phytopathological Society: http://www.cps-scp.ca/
Mycological Society of America: http://www.msafungi.org/
Genetics Society of America: http://www.genetics-gsa.org/
Bean Improvement Cooperative: http://www.css.msu.edu/bic/

Crop and disease information sites:

Dry Bean Production Guide: http://www.ag.ndsu.edu/pubs/plantsci/rowcrops/a1133-1.htm
Bean Genes: http://beangenes.cws.ndsu.nodak.edu/
NDSU Extension Plant Pathology: http://www.ag.ndsu.nodak.edu/extplantpath/