Biological effects of Chitin-synthesis inhibitor, Hexaflumuron compound on the desert locust, Schistocerca gregaria (Forskal)

The treatment of penultimate and last nymphal instar of Schistocerca gregaria with Fagonia bruguieri resulted in a partial blocking of the adult emergence in proportion to the concentration level, irrespective of the type of the extract. A dosedependent suppression of adult survival potential was determined after treatment of penultimate instar nymphs. Similar dose-dependent mortality of the emerged adults was recorded after treatment of last nymphal instar with the methanolic and nbutanolic extracts. With regard to the adult morphogenesis after treatment of penultimate instar nymphs with different F. bruguieri extracts, the most deranging effect was exhibited by methanolic extract. After treatment of last nymphal instar, the adult morphogenesis was considerably affected by both the methanolic extract and n-butanolic extract, parallel to the concentration. Irrespective of the time of nymphal treatment, sexual maturity of S. gregaria adults was hastened by both the methanolic extract and petroleum ether extract of F. bruguieri, especially at the higher two concentration levels. In contrast, n-butanolic extract exhibited a delaying effect on sexual maturity, especially at the higher two concentration levels. Significantly shortened longevity was recorded after treatment of penultimate instar nymphs with methanolic and petroleum ether extracts but prolonged longevity was observed after treatment with n-butanolic extract. Treatment of the last nymphal instar with n-butanolic extract, especially at the higher two concentration levels resulted in accelerated adult aging (as indicated by remarkably shortened longevity). A solitarization tendency of the gregarious adults was activated after nymphal treatment with the n-butanolic extract because some adults appeared with greenish color of both the external morphology and haemolymph.

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Effects of the wild plant, Fagonia bruguieri on the adult performance and phase transition of schistocerca gregaria (orthoptera: acrididae)

Aly

El-Ebiarie

Hamadah

2010

Egyptian Academic Journal of Biological Sciences. A, Entomology

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Sublethal impacts of essential plant oils on biochemical and ecological parameters of the predatory mite Amblyseius swirskii

et al. 2022

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Decrease in Pupation and Adult Emergence of Plutella xylostella (L.) treated with Hexaflumuron

Mahmoudvand

Abbasipour

Garjan

et al. 2012

Chilean J. Agric. Res.

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The oligophagous pest Plutella xylostella (L.) is a major crucifer pest in Tehran Province, Iran. Hexaflumuron is an insect growth regulator insecticide with good effects on immature insect stages. The objective of this study was to investigate the effects of two sublethal concentrations (LC10 and LC25) of hexaflumuron on some biological parameters of P. xylostella larvae, such as birth rate (b), death rate (d), finite rate of increase (λ), generation time (T), sex ratio, pupation rate, and adult emergence. Results showed that hexaflumuron decreased the total number of eggs and oviposition and post-oviposition periods, pupation, and adult emergence in the treated generation, b, and λ. Hexaflumuron also increased T, d, and the preoviposition period. However, sex ratio, percentage of pupation, and adult emergence in the offspring generation were not affected by hexaflumuron. Overall, these results indicated that sublethal concentrations of hexaflumuron can affect the biological parameters of P. xylostella.

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Biological effects of Chitin-synthesis inhibitor, Hexaflumuron compound on the desert locust, Schistocerca gregaria (Forskal)

Cited by 4 publications

References 15 publications

Effects of the wild plant, Fagonia bruguieri on the adult performance and phase transition of schistocerca gregaria (orthoptera: acrididae)

Effects of the wild plant, Fagonia bruguieri on the adult performance and phase transition of schistocerca gregaria (orthoptera: acrididae)

Sublethal impacts of essential plant oils on biochemical and ecological parameters of the predatory mite Amblyseius swirskii

Decrease in Pupation and Adult Emergence of Plutella xylostella (L.) treated with Hexaflumuron

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