Abstract
Dry bubble disease induced by Verticillium fungicola has been observed as an important disease of white button mushroom (Agaricus bisporus) in India. The symptoms produced on well differentiated fruit body are localized light brown depressed spots. The adjacent spots coalesce together to form irregular blotches. If the host pathogen infection is established before differentiation, sclerodermoid fruiting bodies appear on casing surface. All the four fungitoxicants tested in vitro by poisoned food technique inhibited the growth of V. fungicola and A. bisporus. Carbendazim gave highest percent growth inhibition of pathogen and host followed by Thiophanate-methyl, Dithane Z-78 and Dithane M-45. In all the fungitoxicants when tested in bed condition, Carbendazim was observed to be most effective in reducing the disease incidence Key words: Agaricus bisporus, Verticillium fungicola, dry bubble, carbendazim, thiophanate-methyl, dithane Z-78 and dithane M-45.
Highlights
White button mushroom is cultivated throughout the world, contributing about 40% of total world production of mushroom (Flegg, 1992)
Dry bubble caused by Verticillium fungicola (Preuss) Hassebr is prevalent in all mushroom growing areas and has 25-50%
Dry bubble disease of white button mushroom causing brown spots was reported for the first time by Malthouse in 1901
Summary
White button mushroom is cultivated throughout the world, contributing about 40% of total world production of mushroom (Flegg, 1992). Most common fungal diseases of white button mushroom are cobweb, dry/wet bubble, false truffle and green mould (Sharma, 1995). Dry bubble caused by Verticillium fungicola (Preuss) Hassebr is prevalent in all mushroom growing areas and has 25-50%
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