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O presente trabalho teve como objetivo testar o efeito da cal hidratada e do fungicida benomyl no controle de fungos contaminantes durante a produção de cogumelo shiitake em toros de eucalipto. Para tanto, testou-se anteriormente in vitro, o efeito do benomyl nas concentrações 0,5; 1,0; 2,0; 4,0; 8,0 e 16,0 µg.mL-1 no crescimento micelial das linhagens de shiitake JAB-L; JAB-K; LE-96/17; LE-95/01 e LE-96/22. Observou-se que a única linhagem de shiitake a não sofrer qualquer efeito do benomyl foi LE-96/17, sendo a escolhida para produção em toros. O experimento em toros conteve três tratamentos: testemunha, cal hidratada e benomyl, cada qual com 60 repetições. Após a inoculação, os toros foram mantidos em um barracão de alvenaria coberto com telhado de barro, durante seis meses. Após esse período, foram realizados três choques de indução. Os principais gêneros de fungos contaminantes identificados foram Trichoderma e Poria. O melhor controle foi obtido com benomyl, porém esse tratamento apresentou médias inferiores de diâmetro do píleo, produtividade e eficiência biológica. Em todas as colheitas, não foi constatado resíduo de benomyl nos basidiomas.The aim of the present work is to test the effect of the moisturized whitewash and of the fungicide benomyl on the control of saprophytic fungi during the shiitake production in logs. The effect of benomyl in concentrations 0.5; 1.0; 2.0; 4.0; 8.0 and 16.0 µg.mL-1 in the mycelial growth of the isolates of shiitake JAB-L; JAB-K; LE-96/17; LE-95/01 and LE-96/22 was tested in vitro. The isolate LE-96/17 was chosen for production in logs because it was the only isolate of shiitake that was not inhibited by benomyl in vitro. The experiment in logs had three treatments: control, moisturized whitewash and fungicide benomyl, each with 60 repetitions. After inoculation, the logs were kept in a masonry large cabin covered with adobe roof, during six months. After this time period, three induction shocks were carried out. The main sorts of identified contaminant fungi were the Trichoderma and Poria. The best treatment was obtained with benomyl. However, this treatment presented inferior averages of basidiomes diameter, productivity and biological efficiency. In all the harvests, residue of benomyl in basidiomes was not evidenced

Controle de fungos contaminantes no cultivo do cogumelo comestível shiitake em toros de eucalipto