Acaricidal effects of fenvalerate and cypermethrin against Rhipicephalus (Boophilus) annulatus

The acaricidal effects of two most commonly used acaricides viz., fenvalerate and cypermethrin against Rhipicephalus (Boophilus) annulatus were studied using Adult Immersion Test (AIT). The LC50 values observed for fenvalerate and cypermethrin were 1570 ppm and 184 ppm respectively. The death of tic...

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Published inTropical biomedicine Vol. 31; no. 3; pp. 449 - 455
Main Authors Ravindran, R, Ajith Kumar, K G, Suresh, N N, Amithamol, K K, Sunil, A R, Adarshkrishna, T P, Chithra, N D, Jyothimol, G, Ghosh, S, Juliet, S
Format Journal Article
LanguageEnglish
Published Malaysia 01.09.2014
Subjects
Acaricides - pharmacology
Animals
Biological Assay
Nitriles - pharmacology
Pyrethrins - pharmacology
Rhipicephalus - drug effects
Survival Analysis
Time Factors
Zygote - drug effects
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Summary:The acaricidal effects of two most commonly used acaricides viz., fenvalerate and cypermethrin against Rhipicephalus (Boophilus) annulatus were studied using Adult Immersion Test (AIT). The LC50 values observed for fenvalerate and cypermethrin were 1570 ppm and 184 ppm respectively. The death of ticks was not an immediate process. Fenvalerate caused death only after 7 days while cypermethrin after 5 days of treatment. The eggs laid by treated ticks did not hatch at all concentrations tested.
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ISSN:0127-5720