Pen studies on the control of cattle tick (Rhipicephalus (Boophilus) microplus) with Metarhizium anisopliae (Sorokin)

Leemon, Diana Margaret, Turner, L.B. and Jonsson, Nicholas N. (2008) Pen studies on the control of cattle tick (Rhipicephalus (Boophilus) microplus) with Metarhizium anisopliae (Sorokin). Veterinary Parasitology, 156 3-4: 248-260. doi:10.1016/j.vetpar.2008.06.007


Author Leemon, Diana Margaret
Turner, L.B.
Jonsson, Nicholas N.
Title Pen studies on the control of cattle tick (Rhipicephalus (Boophilus) microplus) with Metarhizium anisopliae (Sorokin)
Formatted title
Pen studies on the control of cattle tick (Rhipicephalus (Boophilus) microplus) with Metarhizium anisopliae (Sorokin)
Journal name Veterinary Parasitology   Check publisher's open access policy
ISSN 0304-4017
Publication date 2008-01-01
Sub-type Article (original research)
DOI 10.1016/j.vetpar.2008.06.007
Open Access Status
Volume 156
Issue 3-4
Start page 248
End page 260
Total pages 13
Editor Mansfield, L.S.
Genchi, C.
Taylor, M.A.
Place of publication Netherlands
Publisher Elsevier BV
Language eng
Subject C1
070708 Veterinary Parasitology
830301 Beef Cattle
Abstract Three field trials were conducted over 12 months to assess the pathogenicity of Metarhizium anisopliae to parasitic stages of Rhipicephalus (Boophilus) microplus on dairy heifers under different environmental conditions. Two isolates were selected based on their high optimal growth temperature (30 °C), good spore production characteristics and ability to quickly kill adult engorged ticks in the laboratory. Spores were formulated in an oil emulsion and applied using a motor driven spray unit. Surface temperatures of selected animals were monitored, as were the ambient temperature and relative humidity. Unengorged ticks sampled from each animal immediately after treatment were incubated in the laboratory to assess the efficacy of the formulation and application. Egg production by engorged ticks collected in the first 3 days after treatment was monitored. Side counts of standard adult female ticks were conducted daily, before and after treatment to assess the performance of the fungus against all tick stages on the animals. In each trial the formulation rapidly caused 100% mortality in unengorged ticks that were removed from cattle and cultured in the laboratory. A significant reduction in egg production was recorded for engorged ticks collected in the 3 days post-treatment. However, there was little effect of the formulation on the survival of ticks on cattle, indicating that there is an interaction between the environment of the ticks on the cattle and the biopesticide, which reduces its efficacy against ticks.
Keyword Biological control
Metarhizium anisopliae microplus
Biopesticide
Tick control
cattle
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Veterinary Science Publications
 
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Created: Wed, 25 Mar 2009, 23:48:07 EST by Narelle Poole on behalf of School of Veterinary Science