Abstract
Toxicity and repellency effects of several pure compounds (of plant origin) against the confused flour beetle (Tribolium confusum) were investigated in a filter paper test. The compounds were α-pinen, β-pinen, 4-allyl-anisol, camphor, 1,8-cineol, eugenol, linalool, menthol, piperin, terpineol, thymol and zimtaldehyde. Five compounds (4-allyl-anisol, linalood, terpineol, thymol and zimtaldehyde) caused enough mortality of this insect to allow the determination of LD50 and LD95 values. Zimtaldehyde and 4-allyl-anisol showed the strongest toxicity effects with LD50 values of 0.04–0.05 μl/cm2 within an exposure period of 24 h. When the isolated fumigant effects were tested by separating the insects from the filter paper, the toxicity of zimtaldehyde (LD50=0.29 μl/cm2) was much lower than that of 4-allyl-anisol (LD50=0.10μl/cm2).
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Ojimelukwe, P.C., Adler, C. Potential of zimtaldehyde, 4-allyl-anisol, linalool, terpineol and other phytochemicals for the control of the confused flour beetle (Tribolium confusum J. d. V.) (Col., Tenebrionidae). Anz. Schadlingskde., Pflanzenschutz, Umweltschutz 72, 81–86 (1999). https://doi.org/10.1007/BF02768913
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DOI: https://doi.org/10.1007/BF02768913