Influencia de la carga microbiana contaminante inicial del sustrato en la calidad final de biopreparados de Trichoderma harzianum rifai y Beauveria bassiana (balsamo) vuillemin
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Abstract
The sterility achieved at differing sterilization regimes in substrates used for both Beauveria and Trichoderma mass production was studied as well as its influence on product quality in mass production centres of western Cuba. It was demonstrated that the sterilization regimes should be adjusted according to the contamination level of the substrate. A contamination level of 107 UFC/g or greater was found in 92% of Trichoderma samples. In contrast, 23% of Beauveria samples had a contamination level of 107 UFC/g meanwhile the rest of the samples had a lower contamination level. For Trichoderma products a decrease in viability was observed for the samples having contamination levels of 108 UFC/g, which belonged to the production runs developed on contaminated substrate.
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References
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