Reference : In vitro entomopathogenic activity of Beauveria bassiana against Psoroptes spp. (Acari :...
Scientific journals : Article
Life sciences : Phytobiology (plant sciences, forestry, mycology...)
Life sciences : Veterinary medicine & animal health
Life sciences : Entomology & pest control
http://hdl.handle.net/2268/9066
In vitro entomopathogenic activity of Beauveria bassiana against Psoroptes spp. (Acari : Psoroptidae)
English
Lekimme, Mireille mailto [Université de Liège - ULg > Département des maladies infectieuses et parasitaires > Parasitologie et pathologie des maladies parasitaires >]
Mignon, Bernard mailto [Université de Liège - ULg > Département des maladies infectieuses et parasitaires > Parasitologie et pathologie des maladies parasitaires >]
Tombeux, S. [> > > >]
Focant, Charles mailto [Université de Liège - ULg > Département des sciences de la vie > Biologie et génétique moléculaire >]
Maréchal, Françoise mailto [Université de Liège - ULg > Département des maladies infectieuses et parasitaires > Département des maladies infectieuses et parasitaires >]
Losson, Bertrand mailto [Université de Liège - ULg > Département des maladies infectieuses et parasitaires > Parasitologie et pathologie des maladies parasitaires >]
30-Jun-2006
Veterinary Parasitology
Elsevier Science Bv
139
1-3
196-202
Yes (verified by ORBi)
International
0304-4017
Amsterdam
[en] entomopathogenic fungi ; Beauveria bassiana ; Psoroptes spp. ; ovicidal activity ; biological control
[en] An indigenous strain (IHEM 18747) of Beauveria bassiana (Balsamo) Vuillemin (Deuteromycetes) was evaluated for its in vitro entomopathogenic activity against the parasitic mite Psoroptes ovis Hering (Acari: Psoroptidae) from rabbits. The following aspects were evaluated: (1) effects of conidial concentration on the viability of adult females; (2) influence of the infection on the fertility, and on the hatchability of eggs; (3) and transmission of infection between mites, and from contaminated surface. Adult females immersed into increasing concentrations of conidia (10(4)-10(9) conidia ml(-1)) showed a dose-related susceptibility. At the highest concentration of conidia, LT50 was 1.6 days while LT50 of the controls reached 5.8 days. The fungus was able to sporulate on the body surface and 100% of the mites were covered with mycelium after immersion in solutions containing 10(7)-10(9) conidia ml(-1). One hundred percent of healthy mites exposed to infected cadavers or surfaces acquired the infection (LT50 reached 1.9 and 1.73 days, respectively, versus 6.1 and 5.1 days in controls, respectively). Egg laying was not reduced by the fungal infection but both the hatchability of the eggs and the life span of the emerging larvae were significantly reduced. Eggs directly infected with the fungus did not show reduced hatchability but the life span of the larvae was shortened. It is concluded that B. bassiana has a high entomopathogenic activity against Psoroptes spp. The in vivo use of this biocontrol agent against Psoroptes spp. in rabbit, sheep and cattle deserves further attention. (c) 2006 Elsevier B.V. All rights reserved.
http://hdl.handle.net/2268/9066
10.1016/j.vetpar.2006.02.041

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