1. Butler, D. & Reichhardt, T. Nature 398, 651–656 (1999).
2. 2.Mellon, M. & Rissler, J. Now or Never, Serious New Plans to Save a Natural Pest Control (Union of Concerned Scientists, Cambridge, MA, 1998).
3. 3.Ingram, W. R. in Insect Pests of Cotton(eds Matthews, G. A. & Tunstall, J. P.) 107-148 (CABI, Wallingford, 1994).
4. Gould, F. Annu. Rev. Entomol. 43, 701–726 (1998).
5. Liu, Y. -B. & Tabashnik, B. E. Proc. R. Soc. Lond. B 264, 605–610 (1997).