Scanning Electron Microscope Observation on Antenna of Tomicus piniperda

Using scanning electron microscope, antennae surface structure and morphological character of male and female adults in the periods of stem-attacked and shoot feeding were observed, and the type, the amount and distribution characteristics of five chemoreceptors on the antenna were defined, among these chemoreceptors, two chemoreceptors of bud and sawtooth shape are new discovered type.All the results provide reliable information for aggregation pheromone role in the aggregation behavior of adults.