Nematicidal activity of terpenoids.

Fawzia H Abdel-Rahman, Nina M Alaniz, Mahmoud A Saleh

Department of Biology, Texas Southern University, Houston, Texas 77004, USA. abdelrahman_fh@tsu.edu

Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes 2013

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Thirty four phytoterpenoids were evaluated for their nematicidal effect using the model nematode Caenorhabditis elegans. Nematicidal activities of the tested compounds at concentrations of 50 μg/mL showed wide variation in their effects ranging from no effect, weak, moderate and strong effects. Terpenoids exerting 50% or higher mortality at 50 μg/mL were further tested at five different concentrations to calculate the concentration that will kill 50% of the nematode population (LC(50)). Among the most effective terpenoids were carvacrol, thymol, nerolidol, α-terpinene, geraniol, citronellol, farnesol, limonene, pseudoionone and eugenol in a descending order. These compounds exhibited a dose-dependent effect. The results suggest that the selected monoterpenoids and essential oils with a high concentration of these compounds mayprovide potential natural nematicides and merit further study as botanical nematicides for the control of both plant and animal parasitic nematodes. In general, oxygenated terpenoids and phenolic terpenoids exhibited higher nematicidal activity than hydrocarbons terpenoids.

Citation

Fawzia H Abdel-Rahman, Nina M Alaniz, Mahmoud A Saleh. Nematicidal activity of terpenoids. Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes. 2013;48(1):16-22