The present investigation concerned to study some ecological, aspects of terrestrial snails infesting different plant hosts viz, some field, vegetable, horticultural, ornamental and aromatic plant crops at Sharkia Governorate. A randomly survey carried out to detriment the incidence of land snail species at different area i.e., Hehia, Belbies, Meniat Elkamh, Abou Hammad and Zagazig districts at . Results revealed that three species of land snails belonging to three families of order: Stylommatophora were found. The snails and their families were Family: Hygromiidae (Monach cartusiana), Succineidae (Succinea putris) and Helicidae (Eobania vermiculate). The recorded snails' species were varied in their incidence and it's level of infestation according to the location and host plants. M. cartusiana was dominant comparing with the other species; it was recorded in all surveyed area. M. cartusiana recorded the highest level and infestation on Egyptian clover (+++), Brood peen (+++) and cabbage (+++), especially at Hehia districts. The recorded land snail's species could be ranked according to their incidence in studied areas as following: M. cartusiana > S. putris > E. Vermiculate. However there were many studies conducted on the Population dynamic of snails M. cartusiana and E. Vermiculate at Sharkia Governorate, so snail of S. putris was subjected to study this fenomena in this investigation Results indicated that, S. putris was recorded on Egyptian clover with high density during spring months (March, April and May) throughout two successive seasons 2015/2016 and 2016/2017 at Hehia and Belbies distracts. Population density of S. putris slightly increased to reach its peck (27.8 and 35 individual) & (37.4 and 42.4 individual) during April of growing season 2015/2016 and 2016/2017 at Hehia and Belbies districts respectively.