Center for Agroforestry
Iowa Nut Growers Association
Indiana Nut Growers Association
Kentucky Nut Growers Association
Michigan Nut Growers Association
Midwest Hazelnut Growers
Nebraska Nut Growers Association
Northern Nut Growers Association
Ohio Nut Growers Association
University of Missouri Center for Agroforestry
The Walnut Council
Missouri Forest Health Update (August 4, 2011)-- http://mdc.mo.gov/node/15791 (This is a large file and will take considerable time to download on a dial-up connection.) You can access the April Update at http://mdc.mo.gov/landwater-care/forest-management/forest-health-news as well as subscribe to this and other Missouri Department of Conservation forest health newsletters.
U.S. Forest Service Forest Health Watch Newsletters--http://na.fs.fed.us/fhp/fhw/ Has regional news (files not suitable for dial-up access) as well as information on various forest health issues, such as Thousand Cankers Disease.
Additional links for specific crops are included at the end of each section.