Hemden, H.; Navarro-Llopis, V.; M'saad, M.; Castanera, P.; Feyereisen, R.... (2015). Resistance to lambda-cyhalothrin in Spanish field populations of Ceratitis capitata and metabolic resistance mediated by P450 in a resistant strain. Pest Management Science. 71(9):1281-1291. doi:10.1002/ps.3924. The W-1K strain showed also high levels of cross-resistance to etofenprox (240-fold) and deltamethrin (150-fold).CONCLUSION: Field-evolved resistance to lambda-cyhalothrin has been found in C.capitata. Metabolic resistance mediated by P450 appears to be the main resistance mechanism in the resistant strain W-1K. The levels of cross-resistance found may compromise the effectiveness of other pyrethroids for the control of this species.