Contrasting effects of ethanolic extracts of leaf and flower of Chromolaena odorata against Rhipicephalus (Boophilus) annulatus
2015
RAVINDRAN, REGHU | CHITHRA, NAYIKOTTUMMAL DEVADAS | DEEPA, PATTANUR EDATHIL | JULIET, SANIS | KUMAR, KARAPPARAMBU GOPALAN AJITH | NAIR, SURESH NARAYANAN | UDAYAN, DARSANA | NANJUDAPPA, SATHISH | CHANDRASEKHAR, LEENA | GHOSH, SRIKANTA
In the present study, ethanolic extracts of leaves and flowers of Chromolaena odorata were compared at different dilutions (6.2 mg/mL, 12.5 mg/mL, 25 mg/mL, 50 mg/mL and 100 mg/mL) for their efficacy against ticks. Per cent adult mortality, inhibition of fecundity and hatching of laid ova were studied. Leaf extract did not cause any adult tick mortality. The negative values for the per cent inhibition of fecundity observed with the leaf extract indicatedthat it promoted egg laying. On the contrary, the ethanolic extract of flowers at 10% concentration caused 62% adult tick mortality and 80%inhibition of fecundity. However, both extracts did not produce any change in the hatching of the laid ova by treated ticks.
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