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Morphological structures of S. feltiae isolate at different developmental stages. (A) Dead symptom of P. xylostella larva infected with the nematode isolate. (B) Multiplied nematodes released from the insect cadaver. (C) Whole body shape of the isolate infective juvenile (IJ). (D) IJ esophagus and excretory pore in circle. (E) IJ tail showing anus in circle. (F) Whole body of an adult male. (G) Whole body of an adult female.
