Evaluation of the Internal Morphology of Antennal Sensilla in Scirpophaga Incertulas for Male and Female by Scanning Electron Microscopy

The Scirpophaga incertulas (Walker), trivial name Yellow Stem Borer (YSB) is a serious pest contributing to significant yield loss rice. YSB detects host/mate cues through olfactory receptors (sensilla) on antennae, which critical for its survival, adaptability, and perpetuation. Though destructive pest, mechanism of olfaction poorly understood. Using scanning electron microscope, it attempted detect distinct sensilla, decode their characteristics, compare the antennal sensilla both males females. Sensilla trichodea (S.T), chaetica (S.Ch), styloconica (S.St), squamiformia (S.Sq), coeloconica (S.Co), cavity, Bőhm bristles (BB) are seven kinds subtypes recognized. Sexual dimorphism was observed in arrangement scales over antenna Interestingly, among subtypes, S.T-I only males. Furthermore, without fence (type II) noticed our studies also reported earlier other monophagous lepidopteran pests. statistical analysis number size clearly indicates involvement sexual differentiation. This study may help better understanding processes communication, identification plant volatiles, oviposit site, mate YSB.