Efficacy of Cymbopogon citratus Stapf leaf extract as seed protectant against Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) on stored maize (Zea mays L.)

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Authors

  • Department of Animal and Environmental Biology, University of Uyo ,NG
  • Department of Zoology and Environmental Biology, University of Nigeria, Nsukka ,NG
  • Department of Zoology and Environmental Biology, University of Nigeria, Nsukka ,NG
  • Department of Forestry and Wildlife Resources Management, University of Calabar ,NG

DOI:

https://doi.org/10.18311/jbc/2016/15540

Keywords:

Cymbopogon citratus extract, Toxicity, Zea mays protectant, Sitophilus zeamais, mortality
english

Abstract

A laboratory experiment was conducted to evaluate the insecticidal property of Cymbopogon citratus leaf extract as seed protectant against maize weevil. One (1) gram each of acetone, chloroform, methanol and aqueous extracts were re-suspended in 5 ml of deionized water and used to impregnate filter papers set in four replicates. Varied concentrations of the aqueous extract per 50 g of Zea mays grains infested with 10 pairs of sexed Sitophilus zeamais for 28 days were tested for insecticidal properties and compared with experimental and synthetic conventional insecticide [Coopex (0.25 g)] controls. Parameters assessed were effect of C. citratus extracts on weevil mortality (toxicity test) and protection of maize against S. zeamais. Data obtained were analyzed using Analysis of Variance (ANOVA) and means were separated using New Duncan Multiple Range Test at 5% level of significance. Results showed significant (P < 0.05) concentration and duration dependent mortalities of S. zeamais. The aqueous extract gave the highest protection of the maize grains followed by chloroform, methanol and acetone extracts respectively. The insecticidal potency of C. citratus extracts and its availability places it as an attractive biopesticide in traditional post-harvest seed protection.

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Published

2017-06-21

How to Cite

Oboho, D., Eyo, J., Ekeh, F., & Okweche, S. (2017). Efficacy of <i>Cymbopogon citratus</i> Stapf leaf extract as seed protectant against <i>Sitophilus zeamais</i> Motschulsky (Coleoptera: Curculionidae) on stored maize (<i>Zea mays</i> L.). Journal of Biological Control, 30(4), 220–225. https://doi.org/10.18311/jbc/2016/15540

Issue

Section

Research Articles
Received 2017-02-22
Accepted 2017-03-02
Published 2017-06-21

 

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