Biocontrol of Fusarium udum diseases for some wheat cultivars by Streptomyces spororaveus

This work was designed to explore the potential of microbial antagonism in the control of wheat Fusarium disease. The in vitro studies showed that a 70% concentration of the culture filtrate of Streptomyces spororaveus significantly inhibited spore germination, mycelial growth and sporulation of Fusarium udum. The in vivo studies involved different treatments. The seed coating treatment was the most effective in controlling F. udum at all cultivation periods in all the three-wheat cultivars FFR 502W, FFR 518 and FFR 525W. The former cultivar showed the highest growth response compared with the other two cultivars. Soil pre-inoculation was less effective whereas seed-soaking treatment was the least effective in this respect.   Key words: Actinomycetes, antifungal activities, plant fungal diseases.