Assessment of effectiveness of biological agents in the control of fungal diseases of the white button mushrooms Ocena skuteczności preparatów biologicznych w ochronie pieczarki przed chorobami grzybowymi

Abstract

Summary The effectiveness of three biofungicides consisting different active substances id est grapefruit extract, extract of grapefruit seeds and flesh and garlic pulp in the control of dry bubble in crop experiments was examined. Prochloraz-manganese (prochloraz-Mn) and chlorothalonil were also included as reference products. The most effective in the disease control was prochloraz-Mn, while the biofungicides and chlorothalonil were not sufficiently efficient against the disease. The assessment of biofungicides’ efficacy in the control of Lecanicillium fungicola and Mycogone perniciosa isolates was conducted in vitro. It was found that grapefruit extract at a concentration of 2% and garlic pulp at a concentration of 0.4% were highly effective in inhibiting the growth of pathogens. Average degree of inhibition for L. fungicola mycelial growth ranged from 60 to 80% and M. perniciosa mycelial growth was respectively from 60 to 100%. The isolates of L. fungicola were moderately sensitive to extract of grapefruit seeds and flesh. Among the isolates of M. perniciosa, three isolates were distinguished as moderately sensitive and three as sensitive to this extract. The obtained results indicated that the isolates of L. fungicola were found to be more resistant to biofungicides than M. perniciosa isolates