Table 2.

Characteristics of salient nanopesticides prepared from arthropods.

Bioactive material	Metal	Metallic nanoparticles	Maximum absorbance wavelength (nm)	Shapes of the nanoparticles
Bee honey	Silver (Ag)	AgNPs	UV-vis spectroscopy and FTIR show max absorbance at 420 nm	Revealed by TEM circular shape 4 nm, XRD nanocrystallity 6 nm
Bee honey	Gold (Au)	AuNPs	UV-vis spectroscopy max absorbance 541 nm	TEM shows anisotropic shape of rod, sphere, and triangle XRD shows crystalline shape with 15 nm
Cob web	Silver (Ag)	AgNps	UV-vis spectroscopy and SAED show max absorbance at 436 nm	3-50 nm, spherical

FTIR: Fourier-transform infrared; TEM: transmission electron microscopy; XRD: X-ray crystallography; SAED: selected area electron diffraction.