Rhizoctonia
Diseases in Tobacco Greenhouses TB07 - Tobacco Disease Note No. 7
Rhizoctonia
solani structures
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| Figure
22. Thanatephorus cucumeris, name of the sexual stage
of Rhizoctonia solani, is present when high temperatures
and moisture are present in tobacco greenhouses. Spores (basidiospores)
are produced on a specialized fungal structure called a hymenium. Figure 23. The hymenium is formed on the surface of any tissue (infected or not). Basidiospores are produced on the hymenium and wind dispersed in the greenhouse. Most of the AG3 strains form hymenia very easily in the greenhouse. |
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