Histology of the 24 h post-treatment midguts of Culex pipiens larvae treated with hexane extract of Garcinia mangostana. (A, B) Cross-sections of the midgut of hexane extract-treated larvae. (C, D) Cross-sections of the midgut of the control (0.01% DMSO) larvae. DMV, Degraded microvilli; MV, Microvilli; DPM, degenerating peritrophic membrane; PM, Peritrophic membrane; DN, degenerating nuclei; N, Nuclei; LU, lumen.