What are the symptoms and control measures for the Soil borne wheat mosaic virus (SBWMV)?

I- The SBWMV is transmitted by the fungus Polymixa graminis through prolonged rains.

II- The virus survives in the soil for several years, in close relation to the resistance spores of the vector fungus.

III- The SBWMV causes excessive tillering and yellow stripes on the veins of the leaves.

IV- The control measures for SBWMV include the use of cultivars with genetic resistance, crop rotation, and seed treatment with fungicide.