Abstract
Cauliflower damping-off caused byRhizoctonia solani was found to be appreciably reduced when population of the pathogen and other microflora in soil was manipulated by using powders of commercial cellulose, rice stubbles or waterhyacinth biomass in combination with NH4NO3 as soil amendments. Cellulose powder was most effective in reducing the disease incidence. Some of the amendments also promoted seedling growth. Total microbial population as well as those showing antagonism to the pathogen in culture increased relatively more in amended soil than in nonamended control. In general, when C∶N ratio in soil increased, fungal population decreased but actinomycetes and bacterial population increased.
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