Efficacy of Clonostachys rosea and Duddingtonia flagrans in reducing the Haemonchus contortus infective larvae

• Autor(a) principal: Silva, Manoel Eduardo da
• Data de Publicação: 2015
• Outros Autores: Braga, Fabio Ribeiro, Gives, Pedro Mendoza de, Uriostegui, Miguel Angel Mercado, Reyes, Manuela, Soares, Filippe Elias de Freitas, Carvalho, Lorendane Millena de, Rodrigues, Francielle Bosi, Araújo, Jackson Victor de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://dx.doi.org/10.1155/2015/474879; http://www.locus.ufv.br/handle/123456789/12834
• topic: Clonostachys rosea; Duddingtonia flagrans; Haemonchus contortus; Infective Larvae

The biocontrol is proven effective in reducing in vitro and in situ free-living stages of major gastrointestinal helminths, allowing progress in reducing losses by parasitism, maximizing production, and productivity. This study aimed at evaluating the predatory activity of fungal isolates of Duddingtonia flagrans and Clonostachys rosea species and its association on infective larvae (L3) of H. contortus in microplots formed by grasses and maintained in a protected environment. All groups were added with 10 mL of an aqueous suspension with 618 H. contortus L3 approximately. Group 1 was used as control and only received the infective larvae. Groups 2 and 3 received D. flagrans chlamydospores and C. rosea conidia at doses of 5 × 106. Group 4 received the combination of 5 × 106 D. flagrans chlamydospores + 5 × 106 C. rosea conidia. D. flagrans and C. rosea showed nematicidal effectiveness reducing by 91.5 and 88.9%, respectively, the population of H. contortus L3. However, when used in combination efficiency decreased to 74.5% predation of H. contortus L3. These results demonstrate the need for further studies to determine the existence of additive effects, synergistic or antagonistic, between these species.