Journal of Entomology and Nematology
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Article Number - 4482C9F64580


Vol.9(3), pp. 14-22 , June 2017
DOI: 10.5897/JEN2016.0164
ISSN: 2006-9855



Full Length Research Paper

Pathophysiological effects of Neem (Azadirachta indica) derivatives to Rhipicephalus appendiculatus, the tick vector for Theileriosis (East Coast Fever)



Godwin P. Kaaya
  • Godwin P. Kaaya
  • School of Biological Sciences, University of Nairobi, P. O. Box 30197-00100, Nairobi, Kenya.
  • Google Scholar
Marius Hedimbi
  • Marius Hedimbi
  • School of Medicine, Department of Biochemistry and Microbiology, University of Namibia, P. O. Box 13301, Windhoek, Namibia.
  • Google Scholar







 Received: 12 September 2016  Accepted: 10 April 2017  Published: 30 June 2017

Copyright © 2017 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


The effects of 2 Neem derivatives, Neem oil (NO) and Neem Seed Powder (NSP), on various physiological parameters of the brown ear tick, Rhipicephalus appendiculatus, the vector for Theileria parva. Neem oil was applied on rabbit ears using a fine brush, whereas NSP was mixed with rabbit pellets at various concentrations and fed on goats on which various instars of the tick were allowed to feed. Tick larvae smeared with Neem oil (NO) while attached to rabbit ears exhibited significant mortalities. The 10% NO induced a mortality of 40% compared to less than 1% observed in Peanut oil (PO) control. Furthermore, engorgement weights were significantly reduced (0.1 mg NO vs 4 mg PO). Their corresponding moulting percentages were 1 and 71% in NO and PO, respectively. Adult female ticks exhibited reduced engorgement weights and egg mass. Larvae able to attach on goats maintained on 100% NSP were only 11% compared to 66% for control goats fed on rabbit pellets (RP). The corresponding nymphal attachments were 24% NSP and 79% RP. The number and weights of eggs produced by adult ticks fed on goats maintained on NSP also dropped significantly. The hatchability of eggs produced by these ticks was also significantly reduced.

Key words: East Coast Fever, economic losses, Neem derivatives, Rhipicephalus appendiculatus, Theileria parva, tick control.

Abbreviation:

AZA, Azadirachtin-A; DDT, dichlorodiphenyltrichloroethane; ECF, East Coast Fever; NO, Neem oil; NSP, Neem seed powder; PO, peanut oil.


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APA Kaaya, G. P., & Hedimbi, M. (2017). Pathophysiological effects of Neem (Azadirachta indica) derivatives to Rhipicephalus appendiculatus, the tick vector for Theileriosis (East Coast Fever). Journal of Entomology and Nematology, 9(3), 14-22.
Chicago Godwin P. Kaaya and Marius Hedimbi  . "Pathophysiological effects of Neem (Azadirachta indica) derivatives to Rhipicephalus appendiculatus, the tick vector for Theileriosis (East Coast Fever)." Journal of Entomology and Nematology 9, no. 3 (2017): 14-22.
MLA Godwin P. Kaaya and Marius Hedimbi  . "Pathophysiological effects of Neem (Azadirachta indica) derivatives to Rhipicephalus appendiculatus, the tick vector for Theileriosis (East Coast Fever)." Journal of Entomology and Nematology 9.3 (2017): 14-22.
   
DOI 10.5897/JEN2016.0164
URL http://academicjournals.org/journal/JEN/article-abstract/4482C9F64580

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