Effects of ingested phytoecdysteroids on the growth and development of two Lepidopterous larvae

Kubo, Isao; Klocke, James A.; Asano, Shoji

doi:10.1016/0022-1910(83)90031-8

Cited by 115 publications

(53 citation statements)

References 17 publications

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“…Some species are very tolerant, such as H. virescens (Kubo et al 1987), H. armigera (Robinson et al 1987), and S. littoralis (Blackford et al 1996). Other species, Cynthia cardui and Tyria jacobaeae, for example, are semitolerant (Blackford and Dinan 1997a), while others are highly susceptible, such as S. frugiperda, Pectinophora gossypiella (Kubo et al 1981(Kubo et al , 1983, Acrolepiopsis assectella (Arnault and Sláma 1986), A. urticae, and I. io (Blackford and Dinan 1997a).…”

Section: Discussionmentioning

confidence: 99%

Cannibalism of Helicoverpa zea (Lepidoptera: Noctuidae) from Bacillus thuringiensis (Bt) Transgenic Corn Versus Non-Bt Corn

Chilcutt

2006

Journal of Economic Entomology

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Section: Discussionmentioning

confidence: 99%

Cannibalism of Helicoverpa zea (Lepidoptera: Noctuidae) from Bacillus thuringiensis (Bt) Transgenic Corn Versus Non-Bt Corn

Chilcutt

2006

Journal of Economic Entomology

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“…Toxicological data on silkworm B. mori are quite comparable to those of other lepidopteran pest insects (Kubo et al 1983), therefore, it is considered as a suitable model for exploring effects of any new synthetic formulations. In this study, V instar larvae of silk moth B. mori were chosen as a model system to evaluate the lethal and sublethal toxicity effects caused by RH-2485 (methoxyfenozide) and to substantiate the ecdysteroid mimicking action of RH-2485 on ovary development, vitellogenin incorporation and egg production in isolated pupal abdomen (IPA).…”

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confidence: 99%

Effect of RH-2485 on development, metamorphosis and synthesis of major proteins in female silkworm Bombyx mori

2010

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Toxicological data on silkworm Bombyx mori are quite comparable to those of other lepidopteran pest insects, therefore, it is considered as a suitable model for exploring effects of any new synthetic formulations. In this study, female V instar larvae of silk moth B. mori were chosen to evaluate the lethal and sublethal toxicity effects of RH-2485 (methoxyfenozide), a non-steroidal ecdysteroid agonist and to substantiate the ecdysteroid mimicking action of RH-2485 on ovary development, vitellogenin incorporation and egg production in isolated pupal abdomen (IPA). Probit analysis was carried out to find the median lethal dose (LD50) from 96 h cumulative mortality percent. Protein profile of haemolymph, fat body, ovary and eggs were separated in SDS-PAGE. Western blot analysis was carried out to confirm vitellogenin in the ovary. Sublethal effects on feeding, cocoon spinning, pupation, adult emergence and egg production were studied at doses of 1/5 th , 1/10 th and 1/20 th of LD50. Significant changes were observed in all these parameters at all three sublethal doses. The morphological effects were related to underlying biochemical changes by finding the changes in haemolymph, fat body, ovary and egg protein profile. Marked changes were observed in storage proteins (80 kDa) and 30 kDa proteins in the haemolymph at all three sublethal doses. The larvae that escaped the sublethal effects at a dose of 1/20 of LD50 and emerged as adults with malformed wings produced significantly lower number of eggs. The isolated pupal abdomen (IPA) treated with RH-2485 did not metamorphose into adult but the oocyte development and vitellogenesis were normal but the egg precursor processing was incomplete leading to failure in choriogenesis.

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“…In India, about 800 fern species were reported and represented mostly from Western Ghats and Himalayas. Although 9300 species of insects were reported to use ferns as a food source (Crooper-Driver 1978), the insecticidal activity of ferns was reported by various authors ( Jones & Firn 1978;Kubo et al 1983;Rajendran & Reuben 1991;Amer & Mehlhorn 2006;Shukla & Tiwari 2011) and hitherto there is no report against tea pests.…”

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confidence: 99%

Efficacy of certain common ferns against red spider mite Oligonychus coffeae and tea mosquito bug Helopeltis theivora infesting tea

Prabhakaran¹,

Radhakrishnan²,

Srikumar³

et al. 2017

Plant Prot. Sci.

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Prabhakaran P., Radhakrishnan B., Srikumar K.K., Suresh Kumar B. (2017): Efficacy of certain common ferns against red spider mite Oligonychus coffeae and tea mosquito bug Helopeltis theivora infesting tea. Plant Protect Sci., 53: 232-242.In search for botanicals as an alternative remedy to synthetic chemicals in the pest control of tea plantations, ferns such as adiantum raddianum, asplenium aethiopicum, Cyclosorus interruptus, dicranopteris linearis, diplazium polypodioides, and Pteridium aquilinum were evaluated against the two major pests of tea, red spider mite Oligonychus coffeae Nietner and tea mosquito bug Helopeltis theivora Waterhouse, which are the foremost seasonal pests in tea fields, causing severe crop loss. Apart from synthetic chemicals, only the neem kernel extract is recommended in tea fields. The aqueous extracts of ferns were screened at different concentrations against these pests under laboratory and field conditions. The extracts of P. aquilinum and d. linearis showed good contact toxicity at a 5% concentration to O. coffeae. The acaricidal activity was observed in the order P. aquilinum > d. linearis > C. interruptus > a. raddianum > d. polypodioides > a. aethiopicum. Under field conditions, the extract of d. linearis and P. aquilinum showed a 50% reduction in the population of red spider mite and caused no phytotoxic effect to tea leaves. But their insecticidal activity was less pronounced against H. theivora. They exhibit antifeedant activity, which was sustained only for 24 hours. The photochemical screening of extracts showed a qualitatively increased level of saponins in P. aquilinum, d. linearis, and C. interruptus. The study shows that the aqueous extracts of d. linearis and P. aquilinum can be incorporated in the mite control programme in tea.Keywords: botanicals; aqueous extracts; acaricidal activity; insecticidal activity Tea occupies a major position among various plantation crops. It is grown in 50 different countries and the prime producers are India,

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Effects of ingested phytoecdysteroids on the growth and development of two Lepidopterous larvae

Cited by 115 publications

References 17 publications

Cannibalism of Helicoverpa zea (Lepidoptera: Noctuidae) from Bacillus thuringiensis (Bt) Transgenic Corn Versus Non-Bt Corn

Cannibalism of Helicoverpa zea (Lepidoptera: Noctuidae) from Bacillus thuringiensis (Bt) Transgenic Corn Versus Non-Bt Corn

Effect of RH-2485 on development, metamorphosis and synthesis of major proteins in female silkworm Bombyx mori

Efficacy of certain common ferns against red spider mite Oligonychus coffeae and tea mosquito bug Helopeltis theivora infesting tea

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