Antennal sensilla of Xylosandrus germanus adult observed with scanning electron microscope
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Key Words： Xylosandrus germanus, antenna, sensilla
Abstract： Antennae of male andfemale Xylosandrus germanus(Blandford) were observed with scanning electron microscope (SEM). The results showed that the types of sensilla and their distribution patterns were similar in females and males, although the antenna of males was 2/3 as long as that of females. There were five types of sensilla: sensilla trichodea, zigzag sensilla, sensilla chaeticum, sensilla basiconica and bud-shaped sensilla. Sensilla triehodea was the dominant type, which accounted for more than 80%, while the number of sensilla chaeticum was the least, only 1 sensillum. Most of the sensilla (about 85%) were distributed on the club of the antenna, of which about 73% of the sensilla were mainly distributed on the two distal segments. There were less sensilla on scape and funicle, only about 6% and 9%, respectively.