Ectoparasites of cattle particularly tick and lice are global problems and even cause serious economic losses to the farmer and tanning industry in Africa particularly in Ethiopia. The objective of the present study was to evaluate the acaricidal properties of P. dodecandra (L. Herit), C. aurea (Ait) (Benth.) and R.communis (L) against adult A. variegatum (Fabricius) ticks. Leaves of three test plants were collected and prepared in extracts with concentrations of 150 mg/ ml, 100 mg/ml, 50 mg/ml, and 25 mg/ml using distilled water as a solvent for extraction. The experiment was arranged in CRD. Thirteen petridishs were prepared and in each petridishs 30 active adult A.variegatum ticks were added. Three plants extracts with different concentrations and diazinon 0.1% was used as standard positive control. After five minutes, immersed ticks were recovered and deaths of ticks were recorded after 1 hr, 6 hr, 12 hr, 24 hr and 48 hr intervals. Among the three selected plants C. aurea resulted in significantly higher mortality (p<0.05) against A. variegatum in different concentrations and exposure time. The 100% mortality was recorded by 100 mg/ml and 150 mg/ml and 90% and 96.6% mortality by 25 mg/ml and 50 mg/ml concentrations after 48 hours. P.dodecandra leaf extracts at 25 mg/ml concentrations had activity (46.66%) and 150 mg/ml concentrations (73.33%) after 48 hr exposure. Similarly, R.communis had moderate acaricidal activities, (73% and 80%) at lower concentrations and (96% and 100%) with higher concentrations respectively after 48 hr exposure. Based on the results obtained it can be concluded that the application of P.dodecandra, C.aurea and R.communis leaf extracts had important efficacy against A. variegatum cattle ticks.
Published Date: 2020-12-07; Received Date: 2020-11-16