Abstract
Amounts of the phosphorus, in th, e developing kernels (6 days after flowering) was measured by Dr. OKUDA's method (1), on 7 wheat varieties in order to have an idea on their resistance power against ear-scab. Varieties contain.ing lar*cre amounts of phosphorus were found in the varieties which containing "C" -factor as susceptible substance. From these facts "C" factor representing the amount of phosphorus was proved. (1) C-substance as product by action of "C"-factor for susceptibility was proved to be phosphorous. (2) Phosphorous compounds in the developing kernels having an action to the factors A and B and increasing the infection percentage to ear-scab were recognized.
