In 2003 miticide treatments were applied at mid-whorl, late whorl and tassel stage to control Banks and two spotted spider mites. Spider mite populations reached 1496 mites per 2 plants at 37 days post-treatment and killed 7 to 8 leaves per plant in the untreated plots. The standard miticide for whorl treatments was Comite which gave early control, but little season total control and added only 11.3 and 13.0 Bu/A grain yield. Two new miticides, Onager (Gowen) and Oberon (Bayer CropScience), gave excellent, 72 and 92% season total spider mite control, when applied at the whorl stage, but gave less control when applied at the post-tassel stage. These treatments suffered little leaf damage and added 38.4 to 63 Bu/A in grain yield. The standard miticide for post-tassel treatments was Capture which gave 72 % control at 6 days post-treatment, but only 42 % season total spider mite control. This treatment increased grain yield only 14.2, Bu/A relative to the untreated control. The unregistered miticide, Agri-Mek (Syngenta Crop Protection, Inc.), treatments averaged 83 to 95% control and leaf damage was minimal at the end of the season. These treatments increased grain yield 59.6 and 60.3 Bu/A relative to the untreated control. The Agri-Mek treatments gave excellent spider mite knockdown as well as excellent late season twospotted spider mite control.