A 4-alkyl-substituted analogue of guaiacol shows greater repellency to savannah tsetse (Glossina spp.)

Journal of Chemical Ecology
Rajindar K Saini, Ahmed Hassanali

Abstract

The responses of Glossina morsitans morsitans Westwood to guaiacol (2-methoxyphenol), a mild repellent constituent of bovid odors, and seven analogues comprising 2-methoxyfuran, 2,4-dimethylphenol, 2-methoxy-4-methylphenol (4-methylguaiacol), 4-ethyl-2-methoxyphenol (4-ethylguaiacol), 4-allyl-2-methoxyphenol (4-allylguaiacol; eugenol), 3,4-methylenedioxytoluene, and 3,4-dimethoxystyrene were compared in a two-choice wind tunnel. The 4-methyl-substituted derivative (2-methoxy-4-methylphenol) was found to elicit stronger repellent responses from the flies compared with guaiacol. None of the other analogues showed significant repellent effects on flies. 4-Methylguaiacol, guaiacol, and eugenol (which was included because of previous reports of its repellency against a number of arthropods) were further evaluated in the field with wild populations of predominantly Glossina pallidipes Austen. The presence of guaiacol or eugenol near odor-baited traps caused some nonsignificant reduction in the number of tsetse catches at relatively high release rates (approximately 50 mg/hr). In contrast, the 4-methyl derivative at three different release rates (2.2, 4.5, and 9.0 mg/hr) reduced trap catches of baited traps in a dose-response manner. ...Continue Reading

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Citations

Feb 2, 2010·Journal of Chemical Ecology·John A PickettWalter S Leal
May 17, 2014·PLoS Neglected Tropical Diseases·Daniel K MasigaChristian Borgemeister
Jul 16, 2014·Trends in Parasitology·Daniel MasigaAlan Christoffels
Oct 16, 2014·Journal of Chemical Ecology·Airton Torres CarvalhoClemens Schlindwein
Feb 1, 2011·Medical and Veterinary Entomology·S J TorrD R Hall
Oct 19, 2017·PLoS Neglected Tropical Diseases·Rajinder K SainiChristian W Borgemeister
Mar 13, 2018·Journal of Medical Entomology·Steven Ger NyanjomGeorge Fredrick Obiero
Jun 22, 2019·Proceedings of the National Academy of Sciences of the United States of America·Neeraj SoniJohn R Carlson
Oct 10, 2018·Experimental & Applied Acarology·Margaret W KariukiMargaret M Ng'ang'a
Apr 26, 2014·PLoS Neglected Tropical Diseases·George F O ObieroDaniel K Masiga

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