VIRULENCE OF 6 ISOLATES OF PHAEOISARIOPSIS GRISEOLA (SACC) [FERR] UPON 41 COMMON BEAN LANDRACES IN TANZANIA

摘要

Angular leaf spot disease caused by Phaeoisariopsis griseola (Sacc)[Ferr] is the most devastating disease of common bean in Tanzania (Hillocks et al 2006). P. griseola is a genetically variable pathogen, however use of genetically resistant common bean cultivars can control angular leaf spot (ALS) disease in common bean (Phaseolus vulgaris L) effectively. Evaluation of the common bean germplasm for ALS disease resistance is essential when searching for new sources of resistance to angular leaf spot disease. The objective was to screen the 41 common bean landraces and 4 resistant cultivars from CIAT against 6 P. griseola isolates prior to breeding for improved yield and angular leaf spot disease resistance.