HomeInternational Rice Research Notesvol. 22 no. 3 (1997)

Performance of Midland Rice Varieties in a Blast Hot Spot

H. K. Ramappa | N Shivakumar | N. M. Poonachha

Discipline: Agriculture, Pest Science



Blast (Pyricularia oryzae) is a major problem in almost all rice-growing areas in Karnataka, particularly in the high-rainfall malnad region where it is a major reason for low yields there. To find high-yielding, blast-resistant varieties, 27 rice genotypes were evaluated over 3 yr at ARS in Ponnampet, a hot spot for blast.


Thirteen midland varieties with the standard local variety Intan were sown on 10 Jun 1992, 22 Jun 1993, and 22 Jun 1994 and transplanted on 28 Jul 1992, 30 Jul 1993, and 29 Jul 1994, respectively. Heavy rainfall, a common occurrence, delayed transplanting. The genotypes were planted in a randomized complete block design in plots 10 × 7.5 × 9 m. Neck blast incidence