Richard A. Reinert Search for other papers by Richard A. Reinert in Google ScholarClose
David T. Tingey
David T. Tingey Search for other papers by David T. Tingey in Google ScholarClose
Hershell B. Carter
Hershell B. Carter Search for other papers by Hershell B. Carter in Google ScholarClose
Received for publication June 21, 1971. Cooperative investigations of the Environmental Protection Agency and the U.S. Department of Agriculture.
Plant Pathologist, Plant Science Research Division, Agricultural Research Service, U.S. Department of Agriculture, and Botanist and Horticulturist, respectively, Division of Effects Research, Environmental Protection Agency, North Carolina State University, Raleigh.
The authors acknowledge the assistance of Hans Hamann, Associate Statistician, North Carolina State University, Raleigh.