Email updates

Keep up to date with the latest news and content from BMC Ecology and BioMed Central.

Open Access Highly Accessed Research article

Glucosinolate breakdown products as insect fumigants and their effect on carbon dioxide emission of insects

Rong Tsao1*, Chris J Peterson2 and Joel R Coats3

Author affiliations

1 Food Research Program, Agriculture & Agri-Food Canada 93 Stone Road, Ontario NIG 5C9 Canada

2 Wood Products Insect Research Unit, USDA Forest Service, 101-A G.T. Thames Drive, Starkville, MS 39759 USA

3 Pesticide Toxicology Laboratory, Department of Entomology, Iowa State University, Ames, 1A 50011-3140 USA

For all author emails, please log on.

Citation and License

BMC Ecology 2002, 2:5  doi:10.1186/1472-6785-2-5

Published: 22 March 2002

Abstract

Background

Glucosinolate breakdown products are volatile, therefore good candidates for insect fumigants. However, although they are insecticidal, the mode of action of such natural products is not clear. We studied the insecticidal effect of these compounds as fumigants, and monitored the production of carbon dioxide by the insects as a probe to the understanding of their mode of action.

Results

The fumigation 24-h LC50 against the house fly (Musca domestica L.) of allyl thiocyanate, allyl isothiocyanate, allyl cyanide, and l-cyano-2-hydroxy-3-butene was 0.1, 0.13, 3.66, and 6.2 μg cm-3, respectively; they were 0.55, 1.57, 2.8, and > 19.60 μg cm-3, respectively, against the lesser grain borer (Rhyzopertha dominica Fabricius). The fumigation toxicity of some of the glucosinolate products was very close to or better than that of the commercial insect fumigants such as chloropicrin (LC50: 0.08 and 1.3 μg cm-3 against M. domestica and R. dominica, respectively) and dichlorovos (LC50: < 0.02 and 0.29 μg cm-3 against M. domestica and R. dominica, respectively) in our laboratory tests. Significantly increased CO2 expiration was found in insects exposed to the vapor of allyl isothiocyanate, allyl thiocyanate and allyl isocyanate. Allyl isothiocyanate was also found to increase the CO2 expiration of the American cockroach (Periplaneta americana L.).

Conclusions

Glucosinolate breakdown products have potential as biodegradable and safe insect fumigants. They may act on the insect respiratory system in their mode of action.