Harmful Competitors and diseases of <i>P. leurotus ostreatus</i> and their control measures

Extended cultivation of Pleurotus ostreatus in the same location leads to increased infection by harmful organisms, which results in reduced yield and quality of the mushrooms. This, in turn, decreases the profitability of production and may render mushroom growing an unviable industry [1-4]. In blocks infected with harmful competing microorganisms, the growth of P. ostreatus mycelium is initially very slow, and the blocks lose their quality due to the influence of foreign microorganisms. Extended cultivation of Pleurotus ostreatus in the same location has been observed to result in an increase in the incidence of harmful organisms, leading to a decrease in the yield and quality of the mushrooms. xperiments were conducted to investigate the impact of foreign microorganisms on the growth, development, and yield of Pleurotus ostreatus using cotton bolls, a substrate that has proven to be effective in the Republic. According the results, the appearance of Trichoderma fungus in the substrate blocks was observed 7 days after sowing P. ostreatus, with colonies forming that were 2-3 cm in diameter. These indicators were observed in 12.7% of the total number of planted blocks. After 14 days, the percentage of blocks with Trichoderma lesions increased to 18.4%, with moderate damage being the most common.

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