Relation of Color to the Effectiveness of Japanese Beetle Traps

Abstract
Yellow traps were more effective than those painted entirely aluminum, white, light blue, light yellow, dark blue, pink, red, orange, reddish orange. and green varying in shade from light to dark and from yellowish to bluish. Yellow traps captured 50.8% more beetles than the green and white traps of recent years. A green and white trap was more effective than a green trap. When the baffle and the inside of the funnel of a green trap was painted white, the trap functioned as a white trap; when these parts of a white trap were painted green, the trap performed as a green trap. As the color of the baffle and the inside of the funnel govern the effectiveness, there seems to be no necessity for using a dual color scheme on the trap. The most effective trap was one painted with a primary yellow.

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