抄録
Types of surrounding vegetation were evaluated for their influence on numbers of male Spodoptera litura, captured in traps baited with synthetic sex pheromone, a mixture of (Z, E)-9, 11- and (Z, E)-9, 12-tetradecadien-1-ol acetates. A large number of males were captured in traps placed in open vegetable fields, grasslands, and paddy fields. Reduced numbers of males were caught in traps in home gardens. Traps placed in small vegetable gardens surrounded by shrubs and under leafy shade trees caught only occasional males, probably because of the restricted or disturbed air/pheromone movement. In both mass and monitory trapping operations placement of pheromone trap should be made at open areas with short vegetations, the most favorable site to give maximum trap efficiency.
