Abstract
Microdochium oryzae is the causal agent of leaf scald of rice and is present in all stages of the crop. The seeds are considered the major source of inoculum. The fungus was isolated from diseased seeds obtained from commercial crops in the Province of Corrientes, Argentina. The pathogen was transmitted from seed to coleoptile tips in symptomless seedlings at a rate of 2.18%. Pathogenicity of the fungus was confirmed by spraying a spore suspension on healthy 15-day-old rice seedlings.
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