Saturn Yellow was important in orienting and attracting boll weevils,Anthonomus grandisBoheman, to baited and unbaited traps at a distance of 2 m or less; moderately important at distances up to 6 or 7 m; and not important at greater distances. When boll weevils were given a choice between 2 colors of traps in the same circle, the average number of responding marked females was the same (28%) regardless of whether the red traps were baited and the yellow traps unbaited or whether grandlure was in all traps. However, untreated (no pheromone) Saturn Yellow traps spaced 8 m apart caught only 4.4% of released female boll weevils.