شناسايي نژادهاي فيزيولوژيك Magnaporthe grisea عامل بلاست برنج در استان هاي گيلان و مازندران

IDENTIFICATION OF THE PHYSIOLOGICAL RACES OF RICE BLAST CAUSAL AGENT(Magnapothe grisea) IN GUILAN AND MAZANDARAN PROVINCES

Rice blast isolates Magnapothe grisea from Guilan and Mazandaran provinces inoculated on eight international differential cultivars including Raminad str.3, Zenith, NP-125, Usen, Dular, Kanto 51, Sha-tiao- tsao-s, Calaro and five isogenic lines carrying major resistance genes to blast with their parents and the resistance or the susceptibility of the cultivars evaluated. Races IA-89, IA-90, IA-25 and IC-25 identified for Guilan orovince and IA-90 and IA-25 identified for Mazandaran province.