Author(s):

Sutha Raja Kumar R, Eswaran A, Darwin Christdhas Henry, L Kannan C and Jaiganesh V

Abstract: Studies were conducted to assess the efficacy of different substrates, viz., banana leaves, casuarina needle, coir pith, ground nut shell, paddy straw, sugarcane trash, sugarcane bagasse, saw dust and water hyacinth and supplements on the sporophore production. Among the different substrate paddy straw (489.6g bed^-1) was most efficient in enhancing the yield of H. ulmarius. Followed by water hyacinth (474.4g bed^-1) and sugarcane trash (472.7g bed^-1). Among the six different methods of sterilization tested, the chemical sterilization by soaking in 500 ppm formalin plus 75ppm carbendazim solution and autoclaving for 30 min. was observed to be the most efficient method of substrate sterilization which not only prevented contamination by competitive fungi but also enhanced the yield of the mushrooms (489.5g bed^-1). Among the different supplements, horse gram powder recorded the maximum sporophore yield and biological efficiency (498.6g bed^-1 and 99.7%, respectively). Among the various agro wastes paddy straw plus water hyacinth recorded the maximum sporophore yield (498.9g bed^-1) and biological efficiency (99.8%).

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