Dark enamel spheres about the size of a large apple are highly attractive to apple maggot flies, Rhagoletis pomonella (Walsh) (Oatman 1964a; Prokopy 1967, 1968a, b; Moore 1969; Kring 1970; Rivard 1972). Also, yellow enamel rectangles are highly attractive to these flies (Still 1960; Oatman 1964b; Howitt and Connor 1965; Wilde and Goble 1966; Prokopy 1967, 1968b, 1972; Maxwell 1968; Moore 1969; Kring 1970). My recent study (Prokopy 1972) showed that rectangles painted daylight fluorescent yellow attract even more flies than those painted with yellow enamel. This is a report on the orchard response of apple maggot flies to spheres coated with various colors of daylight fluorescent paint or covered with aluminum foil compared with dark enamel spheres.