Abstract
Traditional parasite control is primarily based on the use of chemical acaricides, which unfortunately have many negative side effects. The aim of the present study was to evaluate the effect of plant synthesized silver nanoparticles (AgNPs) using aqueous leaf extract of Manilkara zapota to control Rhipicephalus (Boophilus) microplus. The synthesized AgNPs were characterized by UV–vis spectrum, scanning electron microscopy (SEM), Fourier transform infrared and X-ray diffraction. The UV–vis spectrum of the aqueous medium containing silver nanostructures showed a peak at 421nm corresponding to the surface plasmon resonance band of AgNPs. SEM supports the biosynthesis and characterization of AgNPs with spherical and oval in shape and size of 70–140nm. Acaricidal activity of aqueous leaf extract of M. zapota and synthesized AgNPs were carried out against R. (B.) microplus and the results showed the LC50 values of 16.72 and 3.44mg/L; r2=0.856 and 0.783), respectively.
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