SciELO - Scientific Electronic Library Online

vol.29 issue3Mycelial production of Crinipellis perniciosa on four culture media for DNA extractionDetection and transmission of Drechslera avenae from oat seed author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Fitopatologia Brasileira

Print version ISSN 0100-4158On-line version ISSN 1678-4677


SILVA, Gisele B. da  and  PRABHU, Anne S.. Leaf blast progress in direct and conventional drilling of rice under upland conditions. Fitopatol. bras. [online]. 2004, vol.29, n.3, pp.316-318. ISSN 0100-4158.

The disease progress of leaf blast (Pyricularia grisea) and chlorophyll leaf content in upland rice (Oryza sativa) were studied under direct drilling (DD) and conventional drilling (CD), in field experiments during 1998/1999 and 1999/2000. The apparent infection rates of leaf blast for CD and DD were b = 0.099 (r = 0,97**) and b = 0.666 (r = 0,90**) respectively, in the first growing season. In the second season, the rates for CD and DD were b = 0.054 (r = 0,99**) and b = 0.05 (r = 0,99**). However, there was no significant difference in the rates of leaf blast progress in these two tillage systems. A linear, positive and significant relationship was observed between the chlorophyll content of the leaf and leaf blast severity.

Keywords : Pyricularia grisea; Oryza sativa; epidemiologia; sistema de cultivo.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License