Screening for resistance of the common bean genotypes to common bacterial blight, and bean common mosaic virus

Common bacterial blight (CBB), and bean common mosaic (BCMV) limit beans (Phaseolus vulgaris L.) production worldwide. This study was carried out to perform phenotypic screening asses the leaf reaction of a resistant line CBB BCMV. The experiment conducted using Completely Randomized design with three replications under screen-house conditions. Four improved genotypes for bruchid resistance were collected from improvement projects at Sokoine University Agriculture one commonly cultivated susceptible cultivar local market. Bean seeds sown in pot sterilized soil Xap inoculated by spraying suspension 18 days after planting, while mechanical inoculation performed BCMV on 10 old leaves. Disease severity assessed times 14, 21, 35 1-9 CIAT scale, BCMV, symptoms 15 inoculation. Results show significant differences (p≤0.001) both diseases among tested. 13A/59-98-3x3-3A (scored 1.3 CBB; no infected plant BCMV), AO 29-3-3A 2.0 BCMV) KT020 only 1 had BR59-63-10 intermediate 3.5) CBB. Kablanketi 8 2 plants BCMV). verified against lines obtained SUA used breeding multiple disease cultivars.