METHOD: Reproductive Efficiency CONDITIONS: Green House METHOD NARR: Test were carried out twice, with slightly different inoculation methods. Seedlings were inoculated with either crushed cysts or whole cysts. At 10-12 weeks pwilt. Cysts were counted and reported as a ratio of final population to inoculation number. RESULTS NARR: A Pf/Pi ratio of less than 2 was regarded as resistant. AUTHOR EXPLANATION: Geographical distribution of resistant species is discussed.