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HPLC analysis of spinosyn and butenyl-spinosyn. (A) Fermentation broth of wild-type strain S. spinosa. (B) Standard spinosyn A. (C) Standard spinosyn D. (D) Fermentation broth of wild-type strain S. pogona. (E) Purified butenyl-spinosyn. (F) Analysis of insecticidal activity of H. armigera of the eluent collected at 5.5 min. *p < 0.05, **p < 0.01, ns, no significant.
