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对梨星毛虫触角的外部形态结构在扫描电镜下作了观察。发现梨星毛虫成虫雌雄蛾触角均为双栉齿状，由柄节、梗节和３３—４０节鞭节组成，雌蛾长度在６．１０—７．１０ｍｍ，雄蛾在６．００—６．９０ｍｍ。触角主干及侧枝的背面，侧面均被鳞片覆盖，绝大部分触角感器位于触角的腹面上，仅有少数着生于触角的背面。新有鞭节的表面均为隆起的折皱状脊纹，但柄节和梗节的表面则无。在梨星毛虫成虫触角上共发现四种感器，即毛形感官、刺形感官、锥形感官和腔锥感官。对梨星毛虫雌雄蛾触角的两性差异进行了观察，并作了详细的讨论，发现梨星毛虫雌雄蛾成虫触角具有典型的性二型现象。雄蛾触角侧板很长，其上的毛形感官多目长；雄蛾触角侧板短，其上的毛形感官少目短。
The external morphology of the antenna of the pear star caterpillar was observed under a scanning electron microscope. The results showed that the male and female antennae of the pear-shaped caterpillars were both double-rowed, with peduncle, pedicel and 33-40 lashes. The length of the female was between 6.10-7.10mm and the male was between 6.00-6 .90mm. Tentacles and collateral side of the back, side were covered by scales, the vast majority of antennae in the antennae of the ventral surface, only a few born in the back of the antennae. The new lashing surfaces are raised crease-like ridges, but the surface of the stems and stems is absent. Four types of sensilla were found on the antennae of adult pear-shaped caterpillars, namely hair-shaped sensilla, spiculate sensilla, conical sensilla, and luminal sensilla. The gender differences of antennae of male and female pests were observed and discussed in detail. It was found that the antennae of male and female adults of Pear star caterpillars had the typical sexual type II phenomenon. Male antennae is very long side of the antennae, hairy sensory organs on its head; male antennae short side of the antenna, the hairy sensory organs on the eyes short.