Biosolid Soil Application: Toxicity Tests under Laboratory Conditions

Figure 1

Micrographs of the R. padbergi midgut stained with HE. (A) Animals exposed for 7 days to the control soil; (B, C) animals exposed for 7 days to soil + biosolid; (D) animals exposed for 30 days to soil + biosolid. e: epithelium; em: external membrane; h: hemocyte; hc: hepatic cells; l: lumen; m: muscle fibers; ml: muscular layer; pm: peritrophic membrane; arrow head in (A) brush border; arrow in (B) epithelium renewal. Scale bars = 100 𝜇m.