Efficacy Of Essential Oil From Algerian Rosemary (Rosmarinus Officinalis) As A Fumigant For Controlling Cydia Pomonella (Lepidoptera: Tortricidae) Larvae

Authors

  • Rahmouni Riyadh Author
  • Mezerdi Farid Author

DOI:

https://doi.org/10.64252/dasjwq38

Keywords:

Cydia pomonella, Rosmarinus officinalis, biopesticides, 1, 8-Cineole, chemotype.

Abstract

The codling moth, Cydia pomonella, is a devastating pest for apple cultivation, and its increasing resistance to conventional controls necessitates the development of sustainable alternatives. This study investigates the potential of essential oil from Algerian wild rosemary (Rosmarinus officinalis) as a natural fumigant against C. pomonella larvae, determining its chemical composition and fumigant toxicity.The essential oil was extracted by hydrodistillation and analyzed by GC-MS. Fumigant toxicity was assessed by exposing fifth-instar larvae to various oil concentrations (2.08 to 16.16 µL L¹ air). LC₅₀ and LT₅₀ values were calculated using probit analysis.The oil yield was 0.51% (v/w). The GC-MS analysis revealed a 1,8-Cineole chemotype, with this compound being the most abundant at 51.47%. The oil showed potent fumigant activity dependent on concentration and exposure time, achieving 100% mortality. The 24-hour lethal concentration (LC₅₀) was determined to be 08.72-µL L¹ air, while the lethal time (LT₅₀) at the highest concentration was 14.13 hours. The essential oil of Algerian Rosmarinus officinalis, characterized by its high 1,8-Cineole content, exhibits strong fumigant toxicity against Cydia pomonella larvae. These findings position it as a promising candidate for developing a local botanical insecticide for post-harvest protection, offering an effective alternative to synthetic pesticides

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Published

2025-09-30

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Section

Articles

How to Cite

Efficacy Of Essential Oil From Algerian Rosemary (Rosmarinus Officinalis) As A Fumigant For Controlling Cydia Pomonella (Lepidoptera: Tortricidae) Larvae. (2025). International Journal of Environmental Sciences, 1281-1290. https://doi.org/10.64252/dasjwq38