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Journal of Zhejiang University SCIENCE B 2007 Vol.8 No.10 P.752~755

http://doi.org/10.1631/jzus.2007.B0752


Insecticidal activity of the medicinal plant, Alstonia boonei De Wild, against Sesamia calamistis Hampson


Author(s):  OIGIANGBE Osawe Nathaniel, IGBINOSA Igho Benjamin, TAMO Manuele

Affiliation(s):  Department of Zoology, Ambrose Alli University, Ekpoma, Edo State, Nigeria; more

Corresponding email(s):   noigiangbe2001@yahoo.co.uk, igbinosa202@yahoo.com, m.tamo@cgiar.org

Key Words:  Alstonia boonei, Extract, Sesamia calamistis, Toxicity, Growth inhibitors


OIGIANGBE Osawe Nathaniel, IGBINOSA Igho Benjamin, TAMO Manuele. Insecticidal activity of the medicinal plant, Alstonia boonei De Wild, against Sesamia calamistis Hampson[J]. Journal of Zhejiang University Science B, 2007, 8(10): 752~755.

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author="OIGIANGBE Osawe Nathaniel, IGBINOSA Igho Benjamin, TAMO Manuele",
journal="Journal of Zhejiang University Science B",
volume="8",
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year="2007",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2007.B0752"
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%T Insecticidal activity of the medicinal plant, Alstonia boonei De Wild, against Sesamia calamistis Hampson
%A OIGIANGBE Osawe Nathaniel
%A IGBINOSA Igho Benjamin
%A TAMO Manuele
%J Journal of Zhejiang University SCIENCE B
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.B0752

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T1 - Insecticidal activity of the medicinal plant, Alstonia boonei De Wild, against Sesamia calamistis Hampson
A1 - OIGIANGBE Osawe Nathaniel
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A1 - TAMO Manuele
J0 - Journal of Zhejiang University Science B
VL - 8
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SP - 752
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DOI - 10.1631/jzus.2007.B0752


Abstract: 
The bioactivity of the aqueous extracts of the leaf and stem bark of the medicinal plant, Alstonia boonei De Wild (Apocyanaceae), against the pink stalk borer, Sesamia calamistis Hampson (Lepidoptera: Noctuidae) was studied in a laboratory bioassay. The extracts were incorporated into artificial diet at a rate of 0.0% (control), 1.0%, 2.5%, 5.0%, and 10.0% (w/w). Both extracts significantly (P<0.01) reduced larval survival and weight in a dose dependent manner. The concentrations that killed 50% of the larvae (LC50) for the stem bark extract were 2.8% and 2.1% at 10 and 20 DAI (days after introduction), respectively, while those for the leaves extract were 5.6% and 3.5%. The weights of the larvae also varied significantly (P<0.05) between the treatments in a dose dependent manner. We conclude that both leaf and stem bark extracts of A. boonei are toxic, used as growth inhibitors to S. calamistis larvae, and hold good promise for use as alternative crop protectants against S. calamistis.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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