MORTALITY RATE OF ADULT TICKS DUE TO INFECTION BY ENTOMOPATHOGENIC NEMATODES

The mortality of Boophilus annulatus, Hyalomma excavatum, Rhipicephalus bursa, and Rhipicephalus sanguineus adult ticks was recorded after their exposure in petri dishes to 5 entomopathogenic nematode strains. The strains used were DT and Mexican of Steinernema carpocapsae, Hb HP88 of Heterorhabditi...

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Bibliographic Details
Published in:The Journal of parasitology 2000-08, Vol.86 (4), p.679-684
Main Authors: Samish, Michael, Alekseev, Evgeny, Glazer, Itamar
Format: Article
Language:English
Subjects:
Adult insects
Animals
Bioassay
Biological and medical sciences
Blood
DEVELOPMENT
Eating - immunology
Entomophilic nematodes
Female
Female animals
Fundamental and applied biological sciences. Psychology
Life tables
Male
Medically important nuisances and vectors, pests of stored products and materials: population survey and control
Mortality
Nematodes
Nymphs
Parasite hosts
Rhabditida - pathogenicity
Rhabditoidea - pathogenicity
Ticks
Ticks - growth & development
Ticks - immunology
Ticks - parasitology
Time Factors
Vectors. Intermediate hosts
Virulence
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Summary:The mortality of Boophilus annulatus, Hyalomma excavatum, Rhipicephalus bursa, and Rhipicephalus sanguineus adult ticks was recorded after their exposure in petri dishes to 5 entomopathogenic nematode strains. The strains used were DT and Mexican of Steinernema carpocapsae, Hb HP88 of Heterorhabditis bacteriophora, and IS-3 and IS-5 of Heterorhabditis sp. The most rapid killing rates (LT50 and LT90) were observed for B. annulatus ticks (0.8–5.0 days). Most unfed males died 0.3–2.8 days after the unfed females, whereas even more time (0.8–8.0 days) passed before engorged females died. In most bioassays, the IS-3 and IS-5 strains of Heterorhabditis sp. nematodes appear to be the most pathogenic for ticks and, in most cases, killed ticks several days before the other 3 nematode strains. Unfed adult ticks exposed to nematodes died within less time than it takes for adults to complete their prefeeding period after molting.
ISSN:0022-3395
1937-2345
DOI:10.1645/0022-3395(2000)086[0679:MROATD]2.0.CO;2