Effects of ecdysteroidal extract of Spinacia oleracea L. on life table and population growth parameters of Ephestia kuehniella

Sahaf, B.Z.; Moharramipour, S.

doi:10.22092/ijmapr.2014.7499

Document Type : Research Paper

Authors

B.Z. Sahaf ¹
S. Moharramipour ²

¹ Ph.D. Student, Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

² Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

https://doi.org/10.22092/ijmapr.2014.7499

Abstract

In this research, the effect of ecdysteoidal extract from Spinacia oleracea L. (Chenopodiceae), a plant producing phytoecdysteroids, was evaluated on the life table and population growth parameters of Ephestia kuehniella (Lepidoptera: Pyralidae). Ecdysteroidal extract of the plant leaves, containing 20 hydroxyecdysone, was incorporated into the food given to the insect. Newly hatched larvae (100 replications) were reared individually in test glasses. Data analysis demonstrated that the intrinsic rate of increase (r_m), mean generation time (T), finite rate of increase (l) and net reproduction rate (R₀) decreased significantly as concentration of the extract increased. In addition, doubling time (DT) increased significantly as concentration of the extract increased. Life expectancy of the insect (e_x)alsoincreased. Total development duration in treated insects was always significantly longer than that in the control group. The control insects had four instar larvae, but it was six for the treated larvae. Data demonstrated that E. kuehniella was partially resistant to ingested exogenous ecdysteroids. Nevertheless, exogenous ecdysteroids were able to disrupt larval development and reduced the fertility. Therefore, this extract may be a potential protectant as botanical alternative agent, and can be used as a biopesticide to control E. kuehniella population.

Keywords

References

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Iranian Journal of Medicinal and Aromatic Plants Research

Effects of ecdysteroidal extract of Spinacia oleracea L. on life table and population growth parameters of Ephestia kuehniella

References

References

Volume 30, Issue 3 - Serial Number 65
August 2014
Pages 353-360

Effects of ecdysteroidal extract of Spinacia oleracea L. on life table and population growth parameters of Ephestia kuehniella

References

References

Volume 30, Issue 3 - Serial Number 65August 2014Pages 353-360

Volume 30, Issue 3 - Serial Number 65
August 2014
Pages 353-360