Figure 1: Light microphotographs of samples before shearing belonging to Heterorhabditis bacteriophora culture broth produced in shake bottle or in a bioreactor, using whey or aguamiel in media formulation: (a) at day 2, bar length = 10 μm, magnification 1000X, (b) at day 8, bar length = 500 μm, magnification 40X. (c) Mature culture at day 20 bar length = 500 μm, magnification 40X.