Mycoflora of certain casing materials used in the production of white button mushroom (Agaricus bisporus (Lange) Imbach)

Abstract

In cultivation process of white button mushroom (Agaricus bisporus (Lange) Imbach), casing layer is one of the important parameter and source of variation in production, quality and uniformity of commercial cropping. Mycelia run and change in nutritional status of casing soil is highly correlated with microbial flora. FYM+ garden loam soil (2:1), FYM+ garden loam soil + waste tea leaves (2:1:1), FYM+ garden loam soil + vermi compost (2:1:1), FYM+ garden loam soil (2:1) + Pseudomonas putida (108 c.f.u ml-1), FYM+ garden loam soil + waste tea leaves (2:1:1) + Pseudomonas putida (108 c.f.u ml-1), FYM+ garden loam soil + vermi compost (2:1:1) + Pseudomonas putida (108 c.f.u ml-1) were used as casing materials. Available data showed asignificant variety of organisms Papulaspora byssina, Rhizopu sstolonifer, Rhizoctonia solani, Fusarium sp., Trichoderma harzianum, Penicillium sp., Aspergillus niger, Mucor sp., Cladosporium sp. and Verticillium fungicola that were isolated from casing soil of Agaricus bisporus. The most frequently encountered genera were of Trichoderma harzianum followed by Verticillium fungicola.