Movement and seasonal activity of land snails Theba pisana and Eobania vermiculata (Gastropoda : Helicidae)‎ on citrus orchards at Qalubiya and Sharkia governorates

Abstract EN

Horizontal and vertical dispersals of the land snails, white garden snail, Theba pisana (Müller) and brown garden snail Eobania vermiculata (Müller) (Gastropoda: Helicidae) were investigated in citrus orchards cultivated at Hod Elfadel, Almohamdia, Minya Al-Qamh district, Sharkia Governorate that had an heavy infested with different types of weeds; also, Shoubra Hars, Toukh district, Qalubiya GovernorateAduring the growing season 2018/2019.

Reverse relationship was found between abundance density and distance increasing.

In vertical distribution, the abundance density of snails decreased by distances increasing on orange trees.

Furthermore, spring season harbored the highest population densities followed by summer and winter.

The same trend was observed for the horizontal distribution where abundance densities decreased by increasing distances.