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The predatory capability of three nematophagous fungi in the control of Haemonchus contortus infective larvae in ovine faeces

Published online by Cambridge University Press:  12 April 2024

J. Flores-Crespo
Affiliation:
Proyecto Control Biológico, Centro Nacional de Investigaciones Disciplinarias en Parasitología Veterinaria (CENID-PAVET) INIFAP, Km. 11.5 Carr. Fed. Cuernavaca-Cuautla, Col. Progreso, Municipio de Jiutepec, Estado de Morelos 62550, México
D. Herrera-Rodríguez
Affiliation:
Proyecto Control Biológico, Centro Nacional de Investigaciones Disciplinarias en Parasitología Veterinaria (CENID-PAVET) INIFAP, Km. 11.5 Carr. Fed. Cuernavaca-Cuautla, Col. Progreso, Municipio de Jiutepec, Estado de Morelos 62550, México
P. Mendoza de Gives*
Affiliation:
Proyecto Control Biológico, Centro Nacional de Investigaciones Disciplinarias en Parasitología Veterinaria (CENID-PAVET) INIFAP, Km. 11.5 Carr. Fed. Cuernavaca-Cuautla, Col. Progreso, Municipio de Jiutepec, Estado de Morelos 62550, México
E. Liébano-Hernández
Affiliation:
Proyecto Control Biológico, Centro Nacional de Investigaciones Disciplinarias en Parasitología Veterinaria (CENID-PAVET) INIFAP, Km. 11.5 Carr. Fed. Cuernavaca-Cuautla, Col. Progreso, Municipio de Jiutepec, Estado de Morelos 62550, México
V.M. Vázquez-Prats
Affiliation:
Proyecto Control Biológico, Centro Nacional de Investigaciones Disciplinarias en Parasitología Veterinaria (CENID-PAVET) INIFAP, Km. 11.5 Carr. Fed. Cuernavaca-Cuautla, Col. Progreso, Municipio de Jiutepec, Estado de Morelos 62550, México
M.E. López-Arellano
Affiliation:
Proyecto Control Biológico, Centro Nacional de Investigaciones Disciplinarias en Parasitología Veterinaria (CENID-PAVET) INIFAP, Km. 11.5 Carr. Fed. Cuernavaca-Cuautla, Col. Progreso, Municipio de Jiutepec, Estado de Morelos 62550, México
*
*Fax: 01777 320 55 44 E-mail: pedromdgives@hotmail.com
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Abstract

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The effect of oral administration of three different nematode-trapping fungi, in aqueous suspension containing either Dactylaria sp. or Arthrobotrys oligospora conidia or Duddingtonia flagrans chlamydospores, on the number of Haemonchus contortus infective larvae in sheep faeces, was evaluated. The three selected species of fungi produce three-dimensional adhesive nets in the presence of nematodes. Sixteen Creole sheep were divided into four groups of four animals each. Groups 1 and 2 were orally drenched with a suspension containing 2×107 conidia of either A. oligospora or Dactylaria sp. Group 3, received a similar treatment, with D. flagrans chlamydospores, instead of conidia, being administered, at the same dose. Group 4 acted as control, without any fungi. Faecal samples were collected directly from the rectum of each sheep and faecal cultures were prepared and incubated at 15 and 21 days. Larvae were recovered from faecal cultures and counted. The highest reduction of the nematode population occurred in the D. flagrans group, reaching reductions of 96.3% and 91.4% in individual samplings in plates incubated for 15 and 21 days, respectively. Arthrobotrys oligospora showed moderate reductions in the faecal larval population, ranging between 25–64% at 15 days incubation. In general, Dactylaria sp., was less efficient in its trapping ability. Despite the inconsistent results with Dactylaria sp., reduction percentages of 73.4% and 80.7% were recorded in individual samplings during the first and second days, in plates incubated for 15 days. Duddingtonia flagrans, was shown to be a potential biological control agent of H. contortus infective larvae.

Type
Review Article
Copyright
Copyright © Cambridge University Press 2003

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