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Paper Information

Journal:   IRANIAN JOURNAL OF MEDICINAL AND AROMATIC PLANTS   2014 , Volume 30 , Number 3 (65); Page(s) 353 To 360.
 
Paper: 

EFFECTS OF ECDYSTEROIDAL EXTRACT OF SPINACIA OLERACEA L. ON LIFE TABLE AND POPULATION GROWTH PARAMETERS OF EPHESTIA KUEHNIELLA

 
 
Author(s):  SAHAF B.Z., MOHARRAMIPOUR S.*
 
* DEPARTMENT OF ENTOMOLOGY, FACULTY OF AGRICULTURE, TARBIAT MODARES UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

In this research, the effect of ecdysteoidal extract fromSpinacia 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 (rm), 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 (ex) also increased. 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.

 
Keyword(s): SPINACIA OLERACEA L., ECDYSTEROID, EPHESTIA KUEHNIELLA (LEPIDOPTERA: PYRALIDAE), LIFE TABLE, POPULATION GROWTH PARAMETERS
 
References: 
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