Topical application of some pyrethroids, aganst house fly Musca domestica L.

In this study, three pyrethroid insecticides 'Deltamethrin, Cypermethrin and Cyfluthrin' were evaluated against field and laboratory strains of the adult females of the housefly, Musca domestica L. using topical application bioassay technique under laboratory conditions. Different concentrations were used, which were ranged between 0.001-0.5 ppm against laboratory strain, while were ranged between 0.01-1.0 ppm against field strain. The mortality% of Deltamethrin ranged between 18-99%, while ranged between 16-98% for Cypermethrin and ranged between 15-99% in case of Cyfluthrin against laboratory strain. On the other hand, the mortality% ranged between 25-92%, 25-91 and 25-89% for Deltamethrin, Cypermethrin and Cyfluthrin against field strain, respectively. The results indicated that Cyfluthrin was the most effective insecticide (LD 50 0.0133 ppm) against the adult females as well as, Deltamethrin (LD 50 0.0185 ppm), while Cypermethrin gave (LD 50 0.0223 ppm) against laboratory strain. Against field strain, Cyfluthrin gave (LD 50 0.0846 ppm), while Deltamethrin gave (LD 50 0.0759 ppm), whereas Cypermethrin gave (LD 50 0.0645 ppm). When comparison between the three insecticides using LD 90 level; the same trend was noticed. Slope of laboratory strain in case Deltamethrin, Cyfluthrin and Cypermethrin were 0.9995, 0.0.9594 and 0.9663, respectively, while in filed strain were 0.9817, 0.9248 and 0.9425, respectively. Results indicated that the tabulated X 2 (Chi) 2 were 9.5 in the three insecticides while calculated X 2 (Chi) 2 of laboratory and field stains of adult females using Deltamethrin was 25.15, whereas was 25.45 and 15.55 when using Cypermethrin and Cyfluthrin, respectively against laboratory stain. In other ward, reached 13.47, 6.63 and 15.55 in case Deltamethrin, Cypermethrin and Cyfluthrin, respectively against field stain. Concerning the population of Jeddah Governorate, resistance ration in each tested pyrethroid insecticides were 4.10, 2.89 and 6.36 fold for Deltamethrin, Cypermethrin and Cyfluthrin, respectively. (Alanazi Naimah Asid, Kh. M. Al-Ghamdi, J. A. Mahyoub, Mamdouh I. Nassar, Mangoud, A., Ahmed R. Al- Najada, And B. Z. Alfarhan. Topical Application of Some Pyrethroids against the Housefly, Musca Domestica L. Life Sci J 2015;12(1):148-153). (ISSN:1097-8135). http://www.lifesciencesite.com . 20