Incidence of false smut disease of rice in relation to rice variety and climatic factors in Malaysia

B.L Ho

Abstract

In the carry over of the false smut pathogen of rice from season to season,seasonal variations in climatic factors appeared to be much more important than types of seed. Temperature, rainfall and sunshine hours seemed to be important in affecting incidence and severity of false smut . Low temperatures, high rainfalls and low sunshine hours per day are favourable for disease development .This was particularly true in off season's plantings.There were pronounced differences in resistance among the seventeen varieties tested. A few maintained the same resistance for the two successive off seasons whereas others became more susceptible under the influence of conducive climatic factors in the second off season.

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