Identification and distribution of viruses in the French bean fields of Isfahan province

In a 3-year investigation on french bean fields, samples with mosaic, mottling and yellowing symptoms were collected from French bean fields in various regions of Isfahan province. The symptoms resulted from inoculating samples to test plants and serological tests, indicated that the samples infected to Bean common mosaic virus (BCMV), Cucumber mosaic virus (CMV), Alfalfa mosaic virus (AMV) and Beet curly top virus (BCTV). Frequency of the viruses was determined through sample collecting from 2 - 8 leaf till flowering stages it was indicated that 121BCMV was the prevalent virus in all French bean fields.Infection rate to BCMV in 2-4 leaf stage was 0.41-2.31% and in flowering stage was 3.7-23.16%.Infection of bean fields to CMV and AMV in 2-4 leaf stage were 0 and 0.17% and in flowering stage were 2.74 and 8.92%, respectively.In seed transmission test, 1.34% and 0.02% were infected to BCMV CMV respectively, and infection to AMV was not observed in the seedlings emerged from fied collected bean seeds.