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Identification and preliminary evaluation of viriditoxin, a metabolite of Paecilomyces varioti, as an insecticide for sheep blowfly, Lucilia cuprina (Wied.)

Green, P.E. and Blaney, B.J. and Moore, C.J. and Coonole, M.D. (1989) Identification and preliminary evaluation of viriditoxin, a metabolite of Paecilomyces varioti, as an insecticide for sheep blowfly, Lucilia cuprina (Wied.). General and Applied Entomology, 21 . pp. 33-37.

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Abstract

Solvent extracts of cultures of the fungus Paecilomyces varioti are toxic to sheep blowfly, Lucilia cuprina (Wiedemann) (Diptera: Calliphoridae). Different components of the culture extracts were isolated and bioassayed with L. cuprina. The component with most toxicity was purified and identified from its proton magnetic resonance spectrum as viriditoxin, a known antibiotic metabolite of the fungus. The insecticidal properties of viriditoxin were then evaluated. Mean LCso values for first instar larvae of organophosphate susceptible and resistant strains of L. cuprina were 7.5 and 8.4 ppm respectively. Pilot implant trials in sheep demonstrated that the compound provided protection for 9-17 weeks against both strains of L. cuprina. No adverse effects on the trial sheep were detected.

Item Type:Article
Additional Information:Reproduced with permission from © The Entomological Society of New South Wales.
Keywords:Sheep; Toxicity; Fungal diseases.
Subjects:Animal culture > Sheep > Wool production
Deposited On:23 Jan 2006
Last Modified:13 Aug 2010 15:08

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