The effects of light factors on the calling behavior, sex pheromone titer and the activity of brain suboesophageal ganglia(Br SOG) of female cotton bollworm, Helicoverpa aramigera , were investigated. Unusual photoperiod, exposure to light during scotophase and red, orange, yellow, green, blue, black, violet and white color light were used to treat female cotton bollworms. The results showed that on these factors, the calling peak value decreased, calling rhythm was disrupted, sex pheromone titer decrea...