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Pathogenicity of Metarhizium anisopliae (Hypocreales: Clavicipitaceae) To tick egg cuticular lipids on conidia developement
Year:
2009
Source of publication :
Journal of Medical Entomology
Authors :
Gindin, Galina
;
.
Glazer, Itamar
;
.
Ment, Dana
;
.
Samish, Michael
;
.
Volume :
46
Co-Authors:
Gindin, G., ARO, Volcani Center, PO Box 6, Bet-Dagan 50250, Israel
Ment, D., ARO, Volcani Center, PO Box 6, Bet-Dagan 50250, Israel
Rot, A., Kimron Veterinary Institute, PO Box 12, Bet-Dagan 50250, Israel
Glazer, I., ARO, Volcani Center, PO Box 6, Bet-Dagan 50250, Israel
Samish, M., Kimron Veterinary Institute, PO Box 12, Bet-Dagan 50250, Israel
Facilitators :
From page:
531
To page:
538
(
Total pages:
8
)
Abstract:
The ovicidal efficacy of two entomopathogenic hyphomycetes fungi-Metarhizium anisopliae variety acridum (M. an. ac.) Driver and Milner (Hypocreales: Clavicipitaceae) and Metarhizium anisopliaevariety anisopliae (M. an. an.) (Metschn.) Sorokin (Hypocreales: Clavicipitaceae) - was evaluated against eggs of three tick species (Acari: Ixodidae)-Hyalomma excavatum (Koch), Rhipicephalus (Boophilus) annulatus (Say), and Rhipicephalus sanguineus (Latereille)-by placing eggs, laid by surface-sterilized females, on conidia-impregnated filter paper. Although M. an. an. strains differed in their virulence to the tested ticks, they reduced the hatching percentages of eggs of all three tick species to 0-32% compared with 80-90% in the control eggs. The M. an. ac. strains were found highly virulent to H. excavatum and R. sanguineus eggs, reducing the hatching percentages to 2-6% but had no influence on hatching of R. annulatus eggs. Older tick eggs were more susceptible to fungal infection than newly laid ones. The effects of polar and nonpolar lipid fractions, extracted from the surface of tick eggs, on the development of conidia were tested. Both germination of M. an. an. conidia and formation of appressoria were stimulated by extracts from egg cuticles of all three tested tick species. However, the stimulating effect was lower when the conidia were exposed to lipids from relatively less susceptible R. annulatus eggs than when exposed to lipids from H. excavatum or R. sanguineus eggs. Unlike those of M. an. an., conidia of M. an. ac. exposed to such lipid extracts did not germinate and did not form appressoria. © 2009 Entomological Society of America.
Note:
Related Files :
Acari
Animal
Animals
drug effect
fungi
Growth, Development and Aging
Lipids
Microbiology
Tick eggs
ticks
Show More
Related Content
More details
DOI :
10.1603/033.046.0318
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19526
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:29
Scientific Publication
Pathogenicity of Metarhizium anisopliae (Hypocreales: Clavicipitaceae) To tick egg cuticular lipids on conidia developement
46
Gindin, G., ARO, Volcani Center, PO Box 6, Bet-Dagan 50250, Israel
Ment, D., ARO, Volcani Center, PO Box 6, Bet-Dagan 50250, Israel
Rot, A., Kimron Veterinary Institute, PO Box 12, Bet-Dagan 50250, Israel
Glazer, I., ARO, Volcani Center, PO Box 6, Bet-Dagan 50250, Israel
Samish, M., Kimron Veterinary Institute, PO Box 12, Bet-Dagan 50250, Israel
Pathogenicity of Metarhizium anisopliae (Hypocreales: Clavicipitaceae) To tick egg cuticular lipids on conidia developement
The ovicidal efficacy of two entomopathogenic hyphomycetes fungi-Metarhizium anisopliae variety acridum (M. an. ac.) Driver and Milner (Hypocreales: Clavicipitaceae) and Metarhizium anisopliaevariety anisopliae (M. an. an.) (Metschn.) Sorokin (Hypocreales: Clavicipitaceae) - was evaluated against eggs of three tick species (Acari: Ixodidae)-Hyalomma excavatum (Koch), Rhipicephalus (Boophilus) annulatus (Say), and Rhipicephalus sanguineus (Latereille)-by placing eggs, laid by surface-sterilized females, on conidia-impregnated filter paper. Although M. an. an. strains differed in their virulence to the tested ticks, they reduced the hatching percentages of eggs of all three tick species to 0-32% compared with 80-90% in the control eggs. The M. an. ac. strains were found highly virulent to H. excavatum and R. sanguineus eggs, reducing the hatching percentages to 2-6% but had no influence on hatching of R. annulatus eggs. Older tick eggs were more susceptible to fungal infection than newly laid ones. The effects of polar and nonpolar lipid fractions, extracted from the surface of tick eggs, on the development of conidia were tested. Both germination of M. an. an. conidia and formation of appressoria were stimulated by extracts from egg cuticles of all three tested tick species. However, the stimulating effect was lower when the conidia were exposed to lipids from relatively less susceptible R. annulatus eggs than when exposed to lipids from H. excavatum or R. sanguineus eggs. Unlike those of M. an. an., conidia of M. an. ac. exposed to such lipid extracts did not germinate and did not form appressoria. © 2009 Entomological Society of America.
Scientific Publication
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