FIGURE 3.
Morphological variation in faba bean leaves under Bean yellow mosaic virus (BYMV) challenge in different treatment groups, including G1: control plants, G2: BYMV-infected plants, G3: plants of soil treated with a Rhizobium isolate 4 days before BYMV inoculation, G4: plants treated by foliar spraying of culture filtrate, 24 h before inoculation with BYMV.