Studies on the disinfection of rice seed for control of white tip.

II. Results of simplified hot-water treatment.

Abstract

The rice infected by white tip nematodes was disinfected with simplified hot-water treatment, soaking for ten hours in bath water, the temperature of which was left as it dropped; viz. 44.7-46.1°C at the beginning and 20.7-31.6° Cat the end. Good control, occasionally perfect control was obtained by this treatment. The treat ment had practically no injurious effect on the germination of rice seed. But, it is a matter of concern that the effectiveness of this method may not be constant, as the temperature of bath water is apt to fluctuate too much, influenced by various conditions.