A screening technique to evaluate resistance of rice to Rhynchosporium oryzae.
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A simple and uniforme method for testing rice cultivars for resistance to Rhynchosporium oryzae in a glasshouse was developed. Leaves of 30-day-old plants grown in plastic trays were inoculated with 6- to 7-day-old mycelial disks and incubated under moist conditions for 96 hr. Lesion extension from the point of inoculation was used as a measure of resistance. Susceptibility of test cultivars relative to a standard check cultivar was calculated. Of 40 local and introduced rice cultivars screened, 21 showed relative resistance to one isolate of R. oryzae.
Palabras clave
Resistência varietal, Arroz, Doença, Oryza Sativa, Rhynchosporium Oryzae, Rice, Varietal resistance, Scald diseases