African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Antifeeding and insecticidal effects of Capparis spinosa L. on Spodoptera littoralis (Boisduval) larvae

Afef Ladhari1*, Faten Omezzine1, Ikbel Chaieb2, Asma laarif2 and Rabiaa Haouala3
1Department of Biology, Faculty of Sciences of Bizerte, Jarzouna 7021, Tunisia. 2Laboratory of Plant Protection, Regional Research Centre on Horticulture and Organic Agriculture (CRRHAB), Chott Mariem 4042, Tunisia. 3Department of Biological Sciences and Plant and Environment Protection, Higher Institute of Agronomy of Chott Meriem, University of Sousse, Chott Meriem 4042, Tunisia.
Email: [email protected]

  •  Accepted: 15 October 2013
  •  Published: 31 October 2013

Abstract

Insect pest management is facing the economic and ecological challenge worldwide due to the human and environmental hazards caused by the synthetic pesticide chemicals majority. A search for an alternate technique for the insect pests’ management arises in recent years. The present study was carried out under laboratory conditions, to evaluate the potential of Capparis spinosa L. as control agents against an important pest in Tunisia, Spodoptera littoralis, by a leaf dipping bioassay method. Result showed that C. spinosa leaves extracted with hexane and methanol induced a potent insecticidal effect with 100% mortality followed by stem extracts with a moderate insecticidal activity (50% of mortality) after 7 days of treatment. The ingestion of aqueous and organic extract by the third instar larvae significantly reduced the consumption, growth rates and utilisation of the ingested and digested food, and reduced digestibility. Thus, the feeding deterrence was markedly influenced when larvae fed on leave and stem extracted by chloroform, which caused more than 90% antifeeding effect.

Key words: Aqueous extracts, antifeeding effect, organic extracts,insecticidal activity, toxicity.