Login | Create Account (DAF staff only)

Comparison of bioassay responses to the potential fungal biopesticide Metarhizium anisopliae in Rhipicephalus(Boophilus) microplus and Lucilia cuprina.

Leemon, D.J. and Jonsson, N.N. (2012) Comparison of bioassay responses to the potential fungal biopesticide Metarhizium anisopliae in Rhipicephalus(Boophilus) microplus and Lucilia cuprina. Veterinary Parasitology, 185 (2-4). pp. 236-247.

Full text not currently attached. Access may be available via the Publisher's website or OpenAccess link.

Article Link(s): http://dx.doi.org/10.1016/j.vetpar.2011.10.037

Publisher URL: http://www.elsevier.com

Abstract

Quantal response bioassays were conducted with cattle ticks and sheep blowflies with three different isolates of Metarhizium anisopliae and different methods of inoculation. Ticks were either topically dosed with 2 mu l or immersed in the conidial preparations. Blowflies were either topically dosed with 2 mu l of the conidial preparation or fed on conidia mixed with sugar. Probit analyses were carried out on the mortality data to compare the virulence of these isolates to ticks and blowflies and look for indications of different virulence mechanisms employed by M. anisopliae isolates when invading these hosts. One isolate (ARIM16) showed high virulence to both hosts killing 95% of ticks after 2 days and 88 (+/- 2)% of blowflies after 4 days. Strikingly different mortality patterns indicated that virulence is dependent on different mechanisms in ticks and blowflies. The pattern of mortality seen with ticks suggested that the number of conidia adhering per unit area of the cuticle was more important for rapid tick death than the total number of conidia contacting the entire tick surface. Blowflies fed conidia mixed with food died rapidly after an initial lag phase regardless of dose.

Item Type:Article
Business groups:Agri-Science
Additional Information:© Crown Copyright
Keywords:Metarhizium anisopliae; cattle ticks; Rhipicephalus microplus; sheep; blowfly; Lucilia cuprina; probit analysis; pathogenesis; Boophilus-microplus; pathogenicity; insect; inoculation.
Subjects:Animal culture > Cattle
Veterinary medicine
Deposited On:04 Jun 2012 03:15
Last Modified:04 Jun 2012 03:15

Repository Staff Only: item control page