TY - JOUR AU - Georghiou, G. P. AU - Hawley, M. K. AU - Loomis, E. C. AU - Coombs, M. F. TI - Insecticide resistance in houseflies in California JF - California Agriculture JO - Calif Agr Y1 - 1972/09/01 VL - 26 IS - 9 SP - 4 EP - 6 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v026n09p4 AB - Precise measurement of insecticide toxicity against house flies from various poultry ranches, dairies and cattle feed lots provided evidence of the presence of resistance roughly in proportion to the extent of insecticide use in each situation. The data indicate where changes to new insecticides are advisable, and illustrate how heavy reliance on insecticides over several years for fly control leads to gradual depletion of available insecticide resources.