Controle biológico de nematóides gastrintestinais em bovinos: avaliação da eficácia dos fungos predadores Duddingtonia flagrans e Monacrosporium thaumasium produzidos em sistema bifásico e formulados em matriz de alginato de sódio

• Autor(a) principal: Silva, Manoel Eduardo da
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1482
• topic: Ruminantes - Doenças; Fungos nematófagos; Parasito; Duddingtonia flagrans; Monacrosporium thaumasium; Ruminants - Diseases; Fungi Nematophagous; Parasite; Duddingtonia flagrans; Monacrosporium thaumasium; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::MEDICINA VETERINARIA PREVENTIVA

Brazil has approximately 212 million cattle raised on 171 million hectares of pastures responsible for producing approximately 96% of brazilian beef. This system favors the infection of animals for endoparasites, controlled by the administration of antiparasitic drugs. The species D. flagrans and M. thaumasium are promising and sustainable alternatives for the control of gastrointestinal helminths of ruminants and other herbivores, however, its large-scale production is still a major challenge. The objective of this study was to evaluate the production of mycelial mass and spores of the D. flagrans and M. thaumasium, in biphasic system of production (liquid/solid) and the effect of the isolated formulated in sodium alginate matrix, in the reduction of the gastrointestinal nematode after passage through gastrointestinal tract of female cattle. The test was realized "in vitro" and in semi-arid field to evaluate the environmental reducion of the L3. Liquid culture media soybean dextrose (SD) and corn grits (QM) with pH values between 6.0 and 7.0 are presented as potential for biomass production and agribusiness byproducts with higher protein and energy density were more efficient in the production of spores. "In vitro" test the fungal isolates showed higher predatory activity 72 hours after gastrointestinal transit and in the field test with use of the pellets of sodium alginate as carrier of fungal mycelium was efficient in controlling trichostrongylids thus reducing the number of larvae infective in pasture.