Resumo

ECHEVARRIA, Anayza et al. Response of 18 lines of rice (Oryza sativa L.) to the piriculariosis in the dry season. cultrop [online]. 2010, vol.31, n.2, pp. 00-00. ISSN 0258-5936.

Blast (Pyricularia grisea Sacc.) occurrence was evaluated by taking into account the affected leaf area (AFA) and infection percentages on rice plant panicle neck during seedling and paniculation stages. Thus, 18 rice lines were sown in P. grisea-infected beds using a randomized complete experimental design with three replications and six parental varieties of those lines as control. Data were processed and analyzed through comparing correlations and Tukey’s multiple range test. Results showed that all rice lines were susceptible to blast during seedling stage whereas the opposite happened to panicle neck, since 10 lines (1, 4, 7, 8, 9, 10, 12, 13, 14, and 15) were tolerant. There was not any significant correlation between leaf infection and disease occurrence on panicle neck

Palavras-chave : rice; Oryza sativa; Pyricularia grisea; pest of plants; seedlings.

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