Study Of Sense organs of Rhyzoperthadominica With The Help Of Light Microscopy And Scanning Electron Microscopic Technique

Every year, large quantities of stored products are destroyed or contaminated because of the presence of arthropods, and beetles are by far the most important group of animals attacking these products. Rhyzoperthadominicais well known as a pest of stored grain in all warm regions of the world. It also occurs on a wide variety of food, particularly cereals. The damage is done by both adults and larvae.Adults and larvae of Rhyzoperthadominica feed primarily on stored cereal seed including wheat, maize, rice, oats, barley, sorghum and millet. They are also found on a wide variety of foodstuffs including beans, dried chillies, turmeric, coriander, ginger, cassava chips, biscuits and wheat flour. The present study is carried out to study the morphological structures with the help of light microscopy and scanning electron microscopy. The present study has identified and characterized six different sensilla types on the body parts of Rhyzoperthadominica. External morphology of Rhyzoperthadominicais studied under the scanning electron microscope (JEOL/Eo –JSM-6380 PC-SEM scanning electron microscope).Six different types of sensilla are found on the body parts of Rhyzoperthadominica. These sensilla are basiconica sensilla, trichoidea sensilla, chaetica, ampullacea sensilla, microtrichia, and filiform sensilla. Based on features of scanning electron microscopy, three types of sensilla were distinguished on the antennal segments of, sensilla chaetica (SC), sensilla trichoidea (ST) and sensilla basiconica (SB). Sensillachaetica (SC) are believed to have a dual function of mechanoreception and contact chemoreception.Sensilla trichoidea 1 (ST1) having putative mechanoreceptive functions Sensilla basiconic suggested to be sex pheromone receptor or olfactory function.