Spacing of Screen Traps Baited with Synthetic Sex Pheromone of the Cabbage Looper123

Abstract

A simple, low-cost screen trap baited with synthetic sex pheromone trapped about as many male Trichoplusia ni (Hübner) as a trap equipped with a black1ight lamp and baited with the pheromone. However, the catch per trap per night of 4 traps as much as 244 m apart was less than ½ that of a single trap.