In the apiary of Assiut University, the oriental hornets, Vespa orientalis L., were trapped and collecting every three days by using modified wooden traps to know their fluctuation and population during their active season. Also, detect the differences on the morphology, ultra-structure, and behavior between the different casts (queen, daughter worker and male) of V. orientalis. In the present study, the fluctuation showed that hornet population began with a slight increase number during September which comprised about (12.3%). In October, a big jump occurred (52.5 %) in their number. By the first week of November, the number started to decrease (26.7%) and then disappeared at the second fortnight of November. Antenna plays an important and vital role during host finding and acceptance behavior in insect life. Like many insects, oriental hornet Vespa orientalis L., use antennal chemo-receptors to detect the hosts during its active seasons. Scanning electron microscope (SEM) studies showed five types of sensilla (Chaetica, trichoidea, basiconica, placodea and coeloconica) were distributed on the antenna of the three different casts of the hornet. These function of sensillae possibly as chemo-, and tactile receptors, responding to movements of the antennae.

In the apiary of Assiut University, the oriental hornets, Vespa orientalis L., were trapped and collecting every three days by using modified wooden traps to know their fluctuation and population during their active season. Also, detect the differences on the morphology, ultra-structure, and behavior between the different casts (queen, daughter worker and male) of V. orientalis. In the present study, the fluctuation showed that hornet population began with a slight increase number during September which comprised about (12.3%). In October, a big jump occurred (52.5 %) in their number. By the first week of November, the number started to decrease (26.7%) and then disappeared at the second fortnight of November. Antenna plays an important and vital role during host finding and acceptance behavior in insect life. Like many insects, oriental hornet Vespa orientalis L., use antennal chemo-receptors to detect the hosts during its active seasons. Scanning electron microscope (SEM) studies showed five types of sensilla (Chaetica, trichoidea, basiconica, placodea and coeloconica) were distributed on the antenna of the three different casts of the hornet. These function of sensillae possibly as chemo-, and tactile receptors, responding to movements of the antennae.

Abstract Some organs in animals and human being such as ; liver , intestine and lung contain specific chemicals and active enzymes responsible for biochemical detoxification mechanisms against intoxicating agents. Glutathione is the famous chemical compound which is the substrate for glutathione peroxidase and glutathione – S – transeferase for the phase (II) of the general xenobiotic detoxificating mechanisms . This glutathione is consumed during these reactions and could be restablished by mainly sulfur containing compounds (total thiols). Aflatoxicosis is the most threating environmental condition for health community and animal wealth which is one of the highly interesting field of investigation . This submitted work has been designed in order to deduce the relationship between the level of GSH in these organs during the consecutive exposure to aflatoxicosis and the activity of these enzymes. The exposed rats day after day (for five weeks) to digestive doses of AFB1 (60μg /kg b.w.) showed that the tissue organs were increasingly enriched by accumulated lipid peroxide as a result of intoxication. This cellular peroxidation reactions ( by tissue cytochrome p450) simultaneously showed characteristic histological collaps especially in the lung tissue. The glutathione peroxidase and transeferase were concomitantly diminished by further intoxication . Conclusively; chronic intoxication by aflatoxinB1 consumed the biological reducing glutathione and total thiols as well as the acting peroxidase and transeferase.