The Senegalese grasshopper, Oedaleus senegalensis (Krauss, 1877) (Orthoptera: Acrididae) is recognized as pest of cereal crops and grassy pastures across the African Sahel, generally, and in Kordofan of Sudan frequently. Light trap was installed in Gellabiya village in North Kordofan State, to study scenarios of nocturnal activity and migration tendency every night from April to November for two seasons 2007/08 and 2008/09. Light trap was used as field monitor for observing the nocturnal movement of the adults' of Oedaleus senegalensis. Results showed that the first collection of Oedaleus senegalensis in the trap was on June. Brown females and males were caught in the trap at the end of June but the brown morph was greater than the green morph in the beginning of the rainy season. The numbers oscillated during July and few specimens of females and males were caught at the end of August and early in September. High numbers of the adults were trapped by the end of the rainy season in late October. Three hundred females were dissected from light trap catches. Two hundred eighty were found in pre-vitellogensis, eight were found with spume. Hundred males were inspected and were found with hard cuticle. The number of female adults was higher in season 2007/08 and differed significantly (p < 0.05) from that recorded in season 2008/09. In conclusion light trap is a tool which may give clear picture about this grasshopper activity and lead to good monitoring to organize field management of the Senegalese grasshopper.

Oedaleus senegalensis, Kordofan, Light Trap, Monitoring