James John Milmoe, 76, an Agriculture Department training officer from 1972 to 1994 who specialized in food marketing, died May 9 at his home in Columbia. He had cardiovascular disease.

Mr. Milmoe was a professor of food marketing at the University of Delaware from 1963 to 1972. During those years he was also under contract to Agriculture, which sponsored a book he wrote about roadside marketing.

While working on the book, Mr. Milmoe became perhaps the country's foremost expert on roadside food stands. For several years, he toured rural highways along the East Coast with his family, stopping at farmers' food stands to inquire about the ways in which they sold their produce.

He was born in South Orange, N.J., and graduated from Seton Hall University. After high school, he enlisted in the Army and served as an infantryman in Italy during World War II.

He attended the New York Institute of Finance and Georgetown University law school and received a master's degree in business administration from the University of Delaware. He wrote numerous articles on food business and management.

Mr. Milmoe moved to Washington in 1950 and, from 1951 to 1954, was a securities analyst with the former Washington investment firm of Auchincloss, Parker and Redpath. He was a Washington-based district marketing manager of the Florida Citrus Commission from 1955 to 1963.

Mr. Milmoe lived in Laurel from 1972 to 1994, when he moved to Columbia. He was a member of St. John the Evangelist Catholic Church in Columbia, where he attended Mass daily.

His wife of 50 years, Mary Elizabeth Quinn, died in 2001.

Survivors include three sons, James J. Milmoe Jr. of Elkton, Md., Brian J. Milmoe of Clifton and Michael P. Milmoe of Falls Church; a sister, Katherine S. Milmoe of Fairfax; and five grandchildren.