Efficiency of Two Phytochemical Compounds and a Biopreparation on the Common Prevailing Land Snail Species in Alexandria Governorate, Egypt.

: Phyto-molluscicides are becoming interesting due to its environmental friendliness, accessibility and ease of application. The efficient activity of Azadirachta indica and Mentha piperita essential oils, and a commercial formulation of Bacillus thuringiensis as biopesticide, were tested for their molluscicidal activity against two terrestrial snails’ E. vermiculata and T. pisana. The bioassay technique was performed using the Dipping leaves method to estimate LC 50 and LC 95 values against both terrestrial snails; E. vermiculata and T. pisana, under laboratory conditions. The obtained results indicated that the tested essential oils of A. indica and M. piperita were more toxic against T. pisana than E. vermiculata snails. Where, the deduced LC 50 values of A. indica were 0.87% and 2.37% for M. piperita against T. pisana. Likewise, against E. vermiculata were 2.26 and 9.523%, respectively after 72 h post treatment. On the other hand, the toxicity of B. thuringiensis was more effective against E. vermiculata than T. pisana snails, where the LC 50 values were 2.16% and 8.81%, respectively, after 72hrs post treatment. This study elucidated the promising efficient use of essential oils and or biopesticides in controlling the harmful gastropod pests.