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Predatory capability of the nematophagous fungus Arthrobotrys robusta preserved in silica gel on infecting larvae of Haemonchus contortus

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Abstract

Biological control of gastrointestinal nematodiasis in ruminants is an alternative to reduce the number of infective larvae. The fungal isolates predatory activity preservation is a basic requirement for the success of this control type. The aim of this work is to evaluate the predatory capacity of the fungus Arthrobotrys robusta (isolate I-31), preserved on silica gel on infective larvae of Haemonchus contortus under laboratory conditions on 2 % water agar (2 % WA). In this essay, A. robusta storage on silica gel showed successful predatory activity on H. contortus L3 larvae (p < 0.01) compared to the control group. Nematophagous fungi were not observed in the control group during the experiment. There was a significant reduction (p < 0.01) of 73.84 % in the means of H. contortus (L3) recovered from treatment with isolate I-31 compared to the control without fungi. Results indicate that A. robusta (I-31) could survive stored on silica gel for at least 7 years and keep its predatory activity on H. contortus (L3).

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Acknowledgments

The authors would like to thank Capes, FINEP for the equipments, and Fapemig and CNPq for the grants given.

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Authors and Affiliations

  1. Departamento de Veterinária, Universidade Federal de Viçosa, Viçosa, MG, Cep: 3657000, Brazil

    Fabio R. Braga, Rogério O. Carvalho, André R. Silva, Jackson V. Araújo, Luiza N. Frassy, Andrea Lafisca & Filippe E. F. Soares

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  1. Fabio R. Braga
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  2. Rogério O. Carvalho
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  3. André R. Silva
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  4. Jackson V. Araújo
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  5. Luiza N. Frassy
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  6. Andrea Lafisca
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  7. Filippe E. F. Soares
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Correspondence to Fabio R. Braga.

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Braga and Araújo are recipients of a Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) scholarship.

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Braga, F.R., Carvalho, R.O., Silva, A.R. et al. Predatory capability of the nematophagous fungus Arthrobotrys robusta preserved in silica gel on infecting larvae of Haemonchus contortus . Trop Anim Health Prod 46, 571–574 (2014). https://doi.org/10.1007/s11250-014-0544-2

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