Genetic control of blast in relation to nitrogen fertilization in upland rice.

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dc.contributorANNE SITARAMA PRABHU, CNPAF
dc.contributorMARTA CRISTINA CORSI DE FILIPPI, CNPAF
dc.contributorFRANCISCO JOSE P ZIMMERMANN, CNPAF.
dc.creatorPRABHU, A. S.
dc.creatorFILIPPI, M. C. C. de
dc.creatorZIMMERMANN, F. J. P.
dc.date2013-03-20T23:30:29Z
dc.date2013-03-20T23:30:29Z
dc.date1999-02-10
dc.date1996
dc.date2013-03-20T23:30:29Z
dc.date.accessioned2026-06-30T23:59:41Z
dc.descriptionSix upland rice cultivars were evaluated under two nitrogen levels (10 kg and 60 kg N/ha) for blast control based on slow leaf and panicle blast characteristics in field experiments conducted during three consecutive years. The criteria for measuring slow blasting resistance were area under disease progress curve (AUDPC), maximum severity during disease progress (Ymax) and the rate of increase until the disease reaches maximum ('ymax.). There was a high positive correlation among the criteria utilized. The control of leaf blast in improved rice cultivars (Cuiabana, Centro America, Guarani, Rio Paranaiba) ranged from 36 to 56% for 10 kg/ha of N and from 19 to 49% for 60 kg/ha of N over the susceptible checks (IAC 47, IAC 165). The effect of slow blasting resistance on panicle blast control was less than on leaf blast in most of the cultivars. Increasing the nitrogen level from 10 to 60 kg/ha resulted in a mean yield increase by only 12% corresponding to 258 kg/ha. The data suggest that the existing level os slow blasting resistance in the improved rice cultivars is efficient only under low nitrogen level.
dc.identifierPesquisa Agropecuária Brasileira, v. 31, n. 5, p. 339-347, maio 1996.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/205460
dc.identifier.urihttp://hdl.handle.net/123456789/394951
dc.languageeng
dc.rightsopenAccess
dc.subjectArroz
dc.subjectCerrado
dc.subjectEpidemiologia
dc.subjectOryza Sativa
dc.subjectResistência
dc.subjectPyricularia Grisea
dc.subjectPyricularia Oryzae
dc.subjectrice
dc.titleGenetic control of blast in relation to nitrogen fertilization in upland rice.
dc.typeArtigo de periódico

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