Toxicity and repellence of <i>Citrus jambhiri</i> Lush rind essential oil against maize weevil (<i>Sitophilus zeamais</i> Motschulsky 1855) (Coleoptera: Curculionidae)

Poster

Autor/innen

  • Samuel A. Babarinde Department of Crop and Environmental Protection, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
  • Lamidi A. Usman Department of Chemistry, University of Ilorin, Ilorin, Nigeria
  • Oladele A. Olaniran Department of Crop and Environmental Protection, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
  • Timothy A. Adebayo Department of Crop and Environmental Protection, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
  • Elizabeth O. Ojutiku Department of Crop and Environmental Protection, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
  • Adeyinka K. Adeniyi Department of Crop and Environmental Protection, Ladoke Akintola University of Technology, Ogbomoso, Nigeria

DOI:

https://doi.org/10.5073/jka.2018.463.185

Schlagworte:

Citrus jambhiri, essential oil, fumigant toxicity, GC-MS, lethal time, maize weevil

Abstract

Rind of matured fruits of Citrus jambhiri Lush was hydro-distilled to obtain essential oil (EO) which was subjected to Gas chromatography-Mass spectrometry (GC-MS) analysis. The EO was evaluated for fumigant toxicity (at 27- 107µL/L air) and repellence against maize weevil (Sitophilus zeamais Motschulsky). Area preference methodology was used to evaluate the repellence of the EO at 0.15-0.9 µL/cm2, while isopropanol served as control for both bioassays. The experiments were set up in a completely randomized design and data were subjected to analysis of variance and probit analysis. Fifty-two compounds were identified in the EO with the predominant compounds being a-terpineol (8.03%), citral (7.00%), 4-terpineol (6.52%), caryophellene (4.58%), cis-geraniol (4.44%), citronellal (4.38%), ß-bisabolene (4.01%) and n-hexadecanoic acid (4.70%). Others were a- bergamotene (3.74%), lemonol (3.23%), precocene I (3.33%) and ß-copaene (3.09%). Toxicity progressed with EO dose and exposure period and application of EO at 80 and 107µL/L air caused significantly higher mortality (33.75-100.00%) than isopropanol (0.00-22.50%). Lethal time for 50% assayed weevil (LT50) for the EO application at 107 µL/L air {7.51 (6.95-8.13) h} was significantly lower than the values obtained for 27 and 53 µL/L air {44.78 (27.49-312.61) and 21.87 (11.91-45.96) h, respectively}. EO caused significantly higher repellence (75.00-90.00%) than control (15.00%) at 24 hours after treatment. The results indicate that C. jambhiri rind EO has prospects as effective biorational formulation for control of maize weevil.

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Veröffentlicht

2018-11-05

Ausgabe

Nr. 463 (2018): Proceedings of the 12th International Working Conference on Stored Product Protection (IWCSPP) in Berlin, Germany, October 7-11, 2018

Rubrik

Session 7: Contact Pesticides, Residual Products, and Plant Extracts

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