To evaluate the impact of a single floral visit of Xylocopa olivacea on the production of Luffa cylindrica, its foraging and pollinating activities were studied at Dang in July 2013 and 2014. The Experiments were carried out on 440 flowers labeled at bud stage and divided in three treatments: two differentiated according to the presence or absence of flowers protection regarding insect visits and the third protected and uncovered when flowers were opened, to allow X. olivacea visits. Results indicate that among nine insect species recorded on flowers of L. cylindrica, X. olivacea was ranked second and harvested nectar and pollen. Throughout the pollination efficiency of a single flower visit, X. olivacea provoked a significant increase of the podding rate, the mean number of seeds per pod and the percentage of normal seeds by 89.50 %, 47.18 %, and 76.93 % respectively. The conservation and installation of X. olivacea nests close to L. cylindrica fields is recommended to improve its pod production and seed quality.