Reduced neuronal DA alters behavioral responses to JH manipulation. elavC155/w1118 and elavC155/THK males and females were collected and treated with acetone, methoprene, or precocene immediately following eclosion, then aged for 3 days prior to analysis of courtship or locomotion. All animals were placed with a wild-type individual of the opposite sex for courtship analysis. Initiation of courtship refers to the number of males that failed to initiate courtship within 10 minutes. Females failing to copulate refers to the number of females that failed to copulate after 30 minutes. Exploratory and basal locomotion refer to the first and last two minutes of a 15 minute observation period, respectively. n = 50 pairs that copulated for each population for courtship, or n = 45 for locomotion.