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Effects of RH 5849, the first nonsteroidal ecdysteroid agonist, on larvae of Spodoptera littoralis (Boisd.)(Lepidoptera: Noctuidae)

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Organization
Abstract
The effects of RH 5849 on the larval molt and larval-pupal metamorphosis in Spodoptera littoralis (Boisd.) were examined. Application of RH 5849 to newly ecdysed 3rd and 6th (last) instar larvae induced a larval molt within the first day after application. Symptoms included cessation of feeding and larval weight, extrusion of gut, loss of hemolymph, and a developmentally abnormal and subsequent lethal larval ecdysis. Treated larvae died shortly afterwards. Treated 6th instar larvae, which did not appear to be affected before pupation, showed an abnormal and lethal pupation process. Differences in the protein pattern of the cuticle between treated vs. untreated 6th instar larvae, demonstrated by using PAGE, indicated that in the newly induced larval cuticle some proteins were missing or expressed with less intensity. The lack of several bands in the pattern of cuticular and hemolymph proteins of treated vs. untreated 6th instar larvae, probably from proteins specific for the pupal instar, is suggested as a cause of unsuccessful pupation in the treatment.
Keywords
TOXICITY, PHYSIOLOGY, LARVAL MOLTING, LARVAL-PUPAL METAMORPHOSIS, DEVELOPMENT, CUTICULAR PROTEINS, ECDYSONE AGONIST

Citation

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MLA
Smagghe, Guy, and Danny Degheele. “Effects of RH 5849, the First Nonsteroidal Ecdysteroid Agonist, on Larvae of Spodoptera Littoralis (Boisd.)(Lepidoptera: Noctuidae).” ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 21.2 (1992): 119–128. Print.
APA
Smagghe, G., & Degheele, D. (1992). Effects of RH 5849, the first nonsteroidal ecdysteroid agonist, on larvae of Spodoptera littoralis (Boisd.)(Lepidoptera: Noctuidae). ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY, 21(2), 119–128.
Chicago author-date
Smagghe, Guy, and Danny Degheele. 1992. “Effects of RH 5849, the First Nonsteroidal Ecdysteroid Agonist, on Larvae of Spodoptera Littoralis (Boisd.)(Lepidoptera: Noctuidae).” Archives of Insect Biochemistry and Physiology 21 (2): 119–128.
Chicago author-date (all authors)
Smagghe, Guy, and Danny Degheele. 1992. “Effects of RH 5849, the First Nonsteroidal Ecdysteroid Agonist, on Larvae of Spodoptera Littoralis (Boisd.)(Lepidoptera: Noctuidae).” Archives of Insect Biochemistry and Physiology 21 (2): 119–128.
Vancouver
1.
Smagghe G, Degheele D. Effects of RH 5849, the first nonsteroidal ecdysteroid agonist, on larvae of Spodoptera littoralis (Boisd.)(Lepidoptera: Noctuidae). ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY. 1992;21(2):119–28.
IEEE
[1]
G. Smagghe and D. Degheele, “Effects of RH 5849, the first nonsteroidal ecdysteroid agonist, on larvae of Spodoptera littoralis (Boisd.)(Lepidoptera: Noctuidae),” ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY, vol. 21, no. 2, pp. 119–128, 1992.
@article{207090,
  abstract     = {The effects of RH 5849 on the larval molt and larval-pupal metamorphosis in Spodoptera littoralis (Boisd.) were examined. Application of RH 5849 to newly ecdysed 3rd and 6th (last) instar larvae induced a larval molt within the first day after application. Symptoms included cessation of feeding and larval weight, extrusion of gut, loss of hemolymph, and a developmentally abnormal and subsequent lethal larval ecdysis. Treated larvae died shortly afterwards. Treated 6th instar larvae, which did not appear to be affected before pupation, showed an abnormal and lethal pupation process. 
Differences in the protein pattern of the cuticle between treated vs. untreated 6th instar larvae, demonstrated by using PAGE, indicated that in the newly induced larval cuticle some proteins were missing or expressed with less intensity. The lack of several bands in the pattern of cuticular and hemolymph proteins of treated vs. untreated 6th instar larvae, probably from proteins specific for the pupal instar, is suggested as a cause of unsuccessful pupation in the treatment.},
  author       = {Smagghe, Guy and Degheele, Danny},
  issn         = {0739-4462},
  journal      = {ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY},
  keywords     = {TOXICITY,PHYSIOLOGY,LARVAL MOLTING,LARVAL-PUPAL METAMORPHOSIS,DEVELOPMENT,CUTICULAR PROTEINS,ECDYSONE AGONIST},
  language     = {eng},
  number       = {2},
  pages        = {119--128},
  title        = {Effects of RH 5849, the first nonsteroidal ecdysteroid agonist, on larvae of Spodoptera littoralis (Boisd.)(Lepidoptera: Noctuidae)},
  url          = {http://dx.doi.org/10.1002/arch.940210205},
  volume       = {21},
  year         = {1992},
}

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