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פותח על ידי קלירמאש פתרונות בע"מ -
Entomopathogenic nematodes as a potential biological control method for ticks
Year:
1998
Authors :
גלזר, איתמר
;
.
Volume :
849
Co-Authors:
Kocan, K.M., Department of Anatomy, Pathology and Pharmacology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078-2007, United States
Blouin, E.F., Department of Anatomy, Pathology and Pharmacology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078-2007, United States
Pidherney, M.S., Department of Anatomy, Pathology and Pharmacology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078-2007, United States
Claypool, P.L., Department of Statistics, Oklahoma State University, Stillwater, OK, United States
Samish, M., Division of Parasitology, Kimron Veterinary Institute, Bet Dagan, Israel
Glazer, I., Department of Nematology, Volcani Center ARO Institute, Bet-Dagan, Israel
Facilitators :
From page:
355
To page:
364
(
Total pages:
10
)
Abstract:
Entomopathogenic nematodes have been used for biological control of certain insect pests, In these studies the nematodes were tested as a possible biological control agent for engorged female ticks. Five species of infective juveniles (IJs) were tested initially for their ability to penetrate and kill ticks, including Steinernema glaseri (SG), S. riobravas (SR), S. carpocapsae (DT), S. feltiae (SF) and Heterorhabiditis bacteriophora a (HP88). Infective juveniles (IJs) of SRs and SFs appeared to be the most effective in killing ticks and invaded and killed 30 to 100% of replete females. These two nematode species were tested on several tick species including Amblyomma americanum, A. cajennense, A. maculatum, Dermacentor variabilis and Rhipicephalus sanguineus. Although the killing rate of each tick species varied, the nematodes did not appear to be host specific and were able to kill ticks of all species tested. Egg mass weights of exposed ticks of each species were significantly lower than those of the controls. Ticks were examined with microscopy to determine whether nematodes entered and multiplied inside ticks. Partially fed female Amblyomma americanum and Dermacentor variabilis exposed to 5000 IJs in petri dishes were collected at 8, 24, 48 and 96 hrs (Trial 1) and 1, 2, 3, 4, 7 and 9 days (Trial 2) post-exposure, and fixed, processed and embedded in resin for microscopy studies. Only a few nematodes were seen in the hemocoel and tissues and they were surrounded by a clear space. Bacteria, released from the nematodes, were present in the exposed ticks and appeared to increase daily causing a generalized infection. Degeneration of tick tissues and death of the ticks appeared to result from bacterial proliferation. Nematodes did not multiply within ticks as they do in insect larvae. In these controlled laboratory studies, exposure of ticks to nematodes resulted in tick mortality and reduced egg production. Entomopathogenic nematodes appear to have potential as a biological control agent of ticks, but future studies will be required to determine whether nematode tick interactions will occur in the field.
Note:
Related Files :
Acari
Animals
Female
Nematoda
ticks
עוד תגיות
תוכן קשור
More details
DOI :
10.1111/j.1749-6632.1998.tb11070.x
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:

Itamar's own PDF.

ID:
19517
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:29
You may also be interested in
Scientific Publication
Entomopathogenic nematodes as a potential biological control method for ticks
849
Kocan, K.M., Department of Anatomy, Pathology and Pharmacology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078-2007, United States
Blouin, E.F., Department of Anatomy, Pathology and Pharmacology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078-2007, United States
Pidherney, M.S., Department of Anatomy, Pathology and Pharmacology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078-2007, United States
Claypool, P.L., Department of Statistics, Oklahoma State University, Stillwater, OK, United States
Samish, M., Division of Parasitology, Kimron Veterinary Institute, Bet Dagan, Israel
Glazer, I., Department of Nematology, Volcani Center ARO Institute, Bet-Dagan, Israel
Entomopathogenic nematodes as a potential biological control method for ticks
Entomopathogenic nematodes have been used for biological control of certain insect pests, In these studies the nematodes were tested as a possible biological control agent for engorged female ticks. Five species of infective juveniles (IJs) were tested initially for their ability to penetrate and kill ticks, including Steinernema glaseri (SG), S. riobravas (SR), S. carpocapsae (DT), S. feltiae (SF) and Heterorhabiditis bacteriophora a (HP88). Infective juveniles (IJs) of SRs and SFs appeared to be the most effective in killing ticks and invaded and killed 30 to 100% of replete females. These two nematode species were tested on several tick species including Amblyomma americanum, A. cajennense, A. maculatum, Dermacentor variabilis and Rhipicephalus sanguineus. Although the killing rate of each tick species varied, the nematodes did not appear to be host specific and were able to kill ticks of all species tested. Egg mass weights of exposed ticks of each species were significantly lower than those of the controls. Ticks were examined with microscopy to determine whether nematodes entered and multiplied inside ticks. Partially fed female Amblyomma americanum and Dermacentor variabilis exposed to 5000 IJs in petri dishes were collected at 8, 24, 48 and 96 hrs (Trial 1) and 1, 2, 3, 4, 7 and 9 days (Trial 2) post-exposure, and fixed, processed and embedded in resin for microscopy studies. Only a few nematodes were seen in the hemocoel and tissues and they were surrounded by a clear space. Bacteria, released from the nematodes, were present in the exposed ticks and appeared to increase daily causing a generalized infection. Degeneration of tick tissues and death of the ticks appeared to result from bacterial proliferation. Nematodes did not multiply within ticks as they do in insect larvae. In these controlled laboratory studies, exposure of ticks to nematodes resulted in tick mortality and reduced egg production. Entomopathogenic nematodes appear to have potential as a biological control agent of ticks, but future studies will be required to determine whether nematode tick interactions will occur in the field.
Scientific Publication
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