Mechanisms of Resistance to Pyrethroids in Heliothis and Helicoverpa Species

A.R. McCaffery


The mechanisms of resistance to the synthetic pyrethroids in the Heliothinae are reviewed. Despite inherent species and ecological differences there appear to be unifying concepts which govern the appearance and evolution of these mechanisms. There is a tendency for mechanisms to evolve towards those based on enhanced metabolism by monooxygenases. High-level nerve insensitivity tends to regress in metabolically resistant insects although other low-level forms of nerve insensitivity may be required.

Reprinted from Proceedings of the 1994 Beltwide Cotton Conferences pp. 836 - 837
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998