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Comparative Study of Rice Blast in Direct-Seeded and Transplanted Rice

机译：直播和移栽水稻稻瘟病的比较研究

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The study reports the effects of transplanting on development of rice blast disease. Transplanted and direct-seeded rice of two varieties appeared equally susceptible at the time of inoculation, and the transplanted rice appeared to remain susceptible to secondary infection over a longer period of time than did the direct-seeded rice. It was impossible to describe any relationship between the amount of initial infection and subsequent disease development because of rapid and extensive invasion of the test area by three naturally occurring races of Piricularia oryzae, an event that casts doubt upon the feasibility of conducting such quantitative developmental studies in areas where the disease fluorishes naturally when conditions favor it. The importance of rice blast in the vegetative growth stage as a potential yield reducer was demonstrated. (Author)

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