On the disease progress curve of the ear blast of rice plant caused by Pyricularia oryzae Cav. and the suitable period for various chemicals application for the control of rice blast

Nakamura, K.

Bulletin of the Hiroshima Prefecture Agriculture Experiment Station 31: 11-29


Accession: 000151732

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The curve is divided into 2 parts, primary infection and secondary infection periods. Equations are given for both. The inhibitory effect and the duration of residual effect of various chemicals were obtained according to the change in the curve with chemical application.