Field studies were conducted during 1996 to determine the effect of various harvest aid chemicals on the cotton varieties, 'Suregrow 501' and 'Suregrow 125'. Applications were applied in water at 10 gallons per acre (gpa) to cotton in plots of four rows each spaced 40 inches apart and 40 feet long. Visual ratings were made of percent defoliation and percent boll opening at 7 and 14 days after treatment (DAT) and of percent shoot regrowth at 21 DAT whereby 0 = no effect and 100% = complete effect. The least significant difference (LSD) between means as determined by Fisher's Protected LSD test at the 5% level. The harvest aid chemicals with their descriptions and manufacturers are listed in Table 1.