Toxic Effect of Ethiopian Neem Oil on Larvae of Cattle Tick, Rhipicephalus pulchellus Gerstaeker.

Authors

  • Ismail Mohamed Handule Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand.
  • Chitapa Ketavan Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand.
  • Solomon Gebre National Animal Health Research Center, (NAHRC), Ethiopia.

Keywords:

neem oil, cattle tick, bioacaricidal activity

Abstract

This study was conducted to test susceptibilities of cattle tick, Rhipicephalus pulchellus Gerstaeker after exposure to neem oil. The ultimate goal was to determine the bioacaricidal activity of Ethiopian neem extract under laboratory conditions for the control of R. pulchellus larvae. The LT50 values were determined for populations from each subsequent treatment by probit analysis and significant increases (chi-square test, P>0.01) occurred from one concentration to the next. There was approximately a 5.4-fold increase in the LT50 when concentration of 40% neem oil (LT50 = 0.184) was compared to 10% neem oil (LT50 = 1.01). In addition, serial concentrations of neem oil were applied and knock down concentration (KC50) was obtained (KC50 = 13.43). Baseline information from these experiments will serve as a guide for future studies on susceptibilities of tick, R. pulchellus populations.

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Published

2002-03-31

How to Cite

Ismail Mohamed Handule, Chitapa Ketavan, and Solomon Gebre. 2002. “ Rhipicephalus Pulchellus Gerstaeker”. Agriculture and Natural Resources 36 (1). Bangkok, Thailand:18-22. https://li01.tci-thaijo.org/index.php/anres/article/view/242682.

Issue

Vol. 36 No. 1 (2002): January-March

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.