Observation of the ultrastructure of antennal sensilla in adult Curculio davidi
Curculio davidi is a major seed pest of chestnut(Castanea mollissima),causing serious damage to both quality and yield of chestnut.To investigate the types,morphology,and distribution of antennal sensilla in C.davidi adults,we used scanning electron microscopy to observe the antennae and antennal sensilla of female and male adults.The results showed that there were significant differences in the length of antennae scape,pedicel and the 1st to the 6th sub segments of flagellum between male and female adults of C.davidi.Seven types and 12 subtypes of common sensilla were identified on the antennae of both genders,including four subtypes of sensilla chactica,two subtypes of sensilla basiconica,one subtype of sensilla furcatea,two subtypes of sensilla trichodea,one subtype of Böhm bristles,one subtype of sensilla cavity,and one subtype of sensilla finger-like.Among them,the length of sensilla chaetica Ⅰ,sensilla trichodea Ⅰ,and sensilla furcatea in male adults was significantly greater than those in females,and the number of sensilla basiconica in the 7th and 8th segments of the flagellum in male adults was significantly higher than that in females.
Curculio davidiCastanea mollissimascanning electron microscope(SEM)ultrastructure
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