1. Aleck, J.R. 1973. The development of potato blackleg in relation to inoculum density and environment. M.S. Thesis, Dept. of Botany and Plant Pathology, Colorado State University, 90 p.
2. Bliss, C.I. 1937. Analysis of field experimental data expressed in percentages. Plant Protection 12:67–77 (Institute of Plant Protection, Leningrad, U.S.S.R.).
3. Burkholder, W.H., and W.L. Smith. 1949.Erwinia atroseptica (van Hall) Jennison andErwinia carotovora (Jones) Holland. Phytopathology 39:887–897.
4. Graham, D.C., and J.L. Hardie. 1971. Prospects for control of potato blackleg disease by the use of stem cuttings. Proc 6th Brit Insectic Fungic Conf pp. 219–224.
5. Harrison, M.D., C.H. Livingston, and N. Oshima. 1965. An improved system for controlling soil temperature in the study of soilborne plant pathogens. Plant Dis Rept 49:452–454.