Effects of Anti Juvenile Hormones and Related Compounds on Development in the Larvae of Bombyx mori

Kuwano, Eiichi; Tanaka, Yasuyori; Kikuchi, Masamichi; Etō, Morifusa

doi:10.5109/23913

Cited by 2 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the failure of PI to induce precocious pupation or other features of precocious metamorphosis, in the present study on S. littoralis, was in agreement with those reported results of failure of some anti-JH compounds to induce precocious forms, such as PI againstthe sunn pest Eurygaster integriceps (Tarrant et al, 1982), PII against S. mauritia (Mathai and Nair, 1983), the synthesized anti-JH compound EMD or its analogues against B. mori (Kuwano et al, 1988), the synthesized compound (S)-(+)-FMev against B. mori (Shuto et al, 1988) and PII against S. gregaria (Islam, 1995).…”

Section: Precocious Metamorphosissupporting

confidence: 93%

“…After exposure of the newly moulted 2 nd or 4 th (penultimate) instar nymphs of the grasshopper Euprepocnemis plorans to some doses of PII, various mortality percentages were recorded among the treated nymphs of different instars and the emerged adults (Ghoneim and Basiouny, 2017). Apart from precocenes, other anti-JH compounds displayed different degrees of toxicity against some insects, such as synthesized EMD (ethyl (E)-3-methyl-2-dodecenoate) (Kuwano et al, 1988) and some synthesized analogues of FMev (tetrahydro-4-fluoromethyl-4-hydroxy-2H-pyran-2one) (Shuto et al, 1988) against the mulberry silkworm Bombyx mori. Results of the present study on the Egyptian cotton leafworm Spodoptera littoralis were in agreement with those previously reported results, since topical application (once) of PIonto 1-day old 5 th (penultimate) or 6 th (last) instar larvae affected the survival of the insect, as recorded in various mortality percentages among larvae, pupae and adult females.…”

Section: Impaired Metamorphosis and Morphogenesismentioning

confidence: 99%

“…This prolongation in the pupal duration may be attributed to the indirect interference of this compound with the neuroendocrine organs responsible for the synthesis and release of tropic hormones, like prothoracicotropic hormone (Subrahmanyam et al, 1989). Also, the recordedprolongation of pupal stage may be attributed to a disturbing action of PI on the persistence of JH in the haemolymph where it is only in the absence of JH that ecdysone could be activated and lead to the formation of the next stage (Bowers, 1982;Kuwano et al, 1988). In addition, PI may exhibit a delaying effect on the pupal transformation into adults (Linton et al, 1997).…”

Section: Developmental Disturbance In S Littoralis By Pimentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of the toxic and physiological activities of Precocene I (Anti-juvenile hormone agent) against Spodoptera littoralis Boisd. (Lepidoptera: Noctuidae)

2018

Int. J. Biosci.

View full text Add to dashboard Cite

The cotton leafworm, Spodoptera littoralis is a destructive pest of cotton and various crops all over the year in Egypt as well as in some countries. Objective of the present study was to assess the effects of Precocene I (PI) on survival, growth, development and metamorphosis of this pest. Five doses: 150, 120, 90, 30 and 15 µg/larva had been topically applied (once) onto 1-day old penultimate instar larvae or 1-day old last instar larvae. Various mortality percentages were recorded among the larvae, pupae and adults. LD 50 values were calculated in 70.48 and 234.96 µg/larva, after treatment of 5 th and 6 th larval instars, respectively. PI exerted a diverse action on the maximal body weight (max. wt) of treated larvae, depending on the dose. The larval growth was considerably inhibited. The larval duration was conspicuously shortened while the pupal duration was slightly or significantly prolonged, depending on the dose. Regardless the larval instar under treatment, the developmental rate of pupae was generally regressed. PI failed to induce the precocious pupation, regardless the applied dose. PI exerted a strong inhibitory action on the pupation, regardless the larval instar under treatment. The adult emergence was partially blocked. Some morphologically abnormal pupae were produced after treatment of 6 th instar larvae with the higher two doses.

show abstract

Section: Precocious Metamorphosissupporting

confidence: 93%

Section: Impaired Metamorphosis and Morphogenesismentioning

confidence: 99%

Section: Developmental Disturbance In S Littoralis By Pimentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of the toxic and physiological activities of Precocene I (Anti-juvenile hormone agent) against Spodoptera littoralis Boisd. (Lepidoptera: Noctuidae)

2018

Int. J. Biosci.

View full text Add to dashboard Cite

show abstract

“…In other words, the prolongation of pupal duration might be due to an elevated titer of juvenile hormone (JH) in the haemolymph. Only in the absence of JH in haemolymph, ecdysone could be activated and led to the production of the next stage (Kuwano et al, 1988).…”

Section: Prolonged Developmental Durations and Delayed Developmentmentioning

confidence: 99%

Bioefficacy of Farnesol, A Common Sesquiterpene, On the Survival, Growth, Development, and Morphogenesis of Spodoptera littoralis (Lepidoptera: Noctuidae).

Ghoneim

Hamadah

Waheeb

2020

Egyptian Academic Journal of Biological Sciences, F. Toxicology

View full text Add to dashboard Cite

Egyptian cotton leafworm Spodoptera littoralis (Boisduval) is a dangerous pest of many field crops and vegetables in the world. The present study was conducted to evaluate the toxicity of Farnesol and its effects on the growth, development, and morphogenesis of this insect. The newly moulted larvae of 5 th (penultimate) or 6 th (last) instar larvae were fed on castor bean leaves previously treated with 7 concentrations of Farnesol (400, 200, 100, 50, 25, 12.5 & 6.25 ppm) for 24 hr. The most important results could be summarized as follows. After treatment of 5 th or 6 th instar larvae with Farnesol, various mortalities were recorded among larvae, pupae, and adults. Depending on LC 50 values, Farnesol exhibited stronger insecticidal activity after treatment of 6 th instar larvae (LC 50 = 33.67 ppm) than after treatment of 5 th instar larvae (LC 50 = 36.56 ppm). Farnesol caused a serious reduction of larval weight gain and deleterious regression of the growth rate. The larval and pupal durations had been remarkably prolonged, in a dose-dependent course. Disruption of the developmental program was recorded as a failure of ecdysis after treatment of 5 th instar larvae and production of larval-pupal intermediates, regardless the treated larval instar. Farnesol exerted considerable suppressing action on the pupation. At higher concentrations, Farnesol interfered with the adult emergence, since eclosion was completely prevented at the highest concentration and partially blocked at other concentrations. Irrespective of the treated larval instar, some deformed pupae were developed only at higher two concentrations of Farnesol.

show abstract

Effects of Anti Juvenile Hormones and Related Compounds on Development in the Larvae of Bombyx mori

Cited by 2 publications

References 0 publications

Evaluation of the toxic and physiological activities of Precocene I (Anti-juvenile hormone agent) against Spodoptera littoralis Boisd. (Lepidoptera: Noctuidae)

Evaluation of the toxic and physiological activities of Precocene I (Anti-juvenile hormone agent) against Spodoptera littoralis Boisd. (Lepidoptera: Noctuidae)

Bioefficacy of Farnesol, A Common Sesquiterpene, On the Survival, Growth, Development, and Morphogenesis of Spodoptera littoralis (Lepidoptera: Noctuidae).

Contact Info

Product

Resources

About