Nematophagous fungi from decomposing cattle faeces in Argentina

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• 作者：Carlos Alfredo Saumell^a ; ^{saumell@vet.unicen.edu.ar" class="auth_mail" title="E-mail the corresponding author} ; Alicia Silvina Ferná ; ndez^b ; ¹ ; Luis Alberto Fusé ; ^a ; Manuela Rodrí ; guez^a ; Marí ; a Federica Sagü ; é ; s^a ; Lucí ; a Emilia Iglesias^a
• 关键词：Nematophagous fungi ; Diversity ; Ecology ; Decomposing faeces ; Fungal colonisation
• 刊名：Revista Iberoamericana de Micología
• 出版年：2015
• 出版时间：October-December 2015
• 年：2015
• 卷：32
• 期：4
• 页码：252-256
• 全文大小：585 K

文摘

Biological control of gastrointestinal nematodes of ruminants by use of nematophagous fungi would become part of any livestock parasite integral control system. Identifying autochthonous species that could then be selected for mass production is an important phase in the practical use of biological control.

Aims

To search for nematophagous fungi with potential use as biological control agents against gastrointestinal nematodes in Argentina.

Methods

Decomposing cattle faeces sampled in different locations were incubated in water agar 2% with Panagrellus sp. The developed nematophagous fungi were transferred to new water agar 2% plates and then to corn meal agar plates in order to carry out their identification. Fungal diversity and richness were also assessed.

Results

Seventeen species from nine genera of nematophagous fungi were found. Twelve species were nematode-trapping fungi and three species plus two fungi identified to genus level corresponded to endoparasitic fungi. Arthrobotrys conoides, Arthrobotrys oligospora, Duddingtonia flagrans, Monacrosporium doedycoides, Arthrobotrys robusta and Drechmeria coniospora were the most frequently isolated species overall in the whole study (6.6%, 5.7%, 5.7%, 5.7%, 4.7% and 4.7%, respectively) although other species were more frequently recorded at local levels such as Arthrobotrys pyriformis (18.8%). Only A. conoides has been previously isolated from ruminant faecal samples in Argentina. Five nematode-trapping fungal species are mentioned for the first time in the Americas

Conclusions

D. flagrans and A. conoides, both identified in the present study, are among the most promising ones as biological control agents against gastrointestinal nematodes of ruminants.