Study of Fungus Beauveria Tenella Biological Struggle with Termites of The Genus Anacanthotermes

The articled scribes material son the role of microorganism sin there gulation of populations of Turkestan and large Trans Caspian termites in Uzbekistan. From different termite nests most distinguished representatives of the genera: Aspergillus, Beauveria and Penicillium have been identified. Cases of separation of micromycetes of the genera: Fusarium, Alternaria, Cladosporium have been registered. In artificial termite infestation the strains of B. tenella caused the highest (100.0%) death rate of insects in laboratory conditions. The best indicators for the weight of the raw and dry weight of the fungus are noted on cellophane discs. Food film is unsuitable for this purpose, since it completely blocks the movement of nutrients and, therefore, there is no growth of the fungus. For rational and effective use of the drug in baits, it is necessary to establish the optimal amount of the mushroom component, at which a 100% death of termites is achieved. Moreover, the degree of toxicity of a 20-day culture fluid Fusarium sp. does not depend on the period of its use. The degree of its toxicity did not change from the method of application to the substratum: either immediately before feeding termites, or with preliminary drying and storage on the feed substrate. Thus, pre-treatment of the feed substrate with the culture liquid of the tested fungi with drying at room temperature does not radically alter its toxicity.