A laboratory colony of Tetranychus urticae Koch (Acari: Tetranychidae) that had not been exposed to pesticides for >10 years was separated into 5 groups. Each group was maintained on bush bean plants (c.v. “Top Crop”) that were sprayed weekly from November 2003 to February 2005 with either acetamiprid at 115-ppm a.i., imidacloprid at 60-ppm a.i., thiacloprid at 75-ppm a.i., novaluron at 500-ppm a.i., or water. Bioassays to measure the length of development and oviposition of each colony were conducted in July 2004. Oviposition of T. urticae females (10-12 d old) from the novaluron colony that were individually placed on treated (insecticide of the colony) and non-treated (water) leaf disks (1.5 cm diam) for 4 d increased significantly (P < 0.05) compared with the control. Oviposition of females from the thiacloprid and imidacloprid colonies was higher than the control only when they were placed on the non-treated surfaces. Acetamiprid did not increase oviposition. No significant differences (P > 0.05) were detected among treatments for duration of the developmental time of eggs, protonymphs, deutonymphs, preoviposition period, or total developmental time of female T. urticae; however, the larval stage was significantly (P < 0.01) shorter in acetamiprid (38.0 ± 0.8 h), thiacloprid (39.1 ± 0.7 h), imidacloprid (38.1 ± 0.7 h), and novaluron (38.8 ±0.8 h) compared with the control (45.6 ± 0.7 h). Also, T. urticae males reared on thiacloprid (197.1 ± 1.6 h) had a significantly shorter (P < 0.03) developmental time than males reared on acetamiprid (202.6 ± 1.7 h), novaluron (203.4 ± 1.8 h), and the water control (204.0 ± 1.2 h).