Toxicity of Seven Pesticides belonging to Different Chemical Groups against the Glassy Clover Snail, Moncha Obstructa by using three Method of Application under Laboratory Conditions

The toxicity of seven pesticides belonging to different chemical groups asmetaldehyde, abamectin, methomyl, profenofos,copper hydroxyl, chlorfenapyr and imidaclopridby using three different methodsas DLL (Dipping lettuce leaves), BBMB (Baits of bran with methylene blue) and BBM (Baits of bran with molasses) against land snails, M. obstracta under laboratory conditions.Results presented that metaldehyde was the most toxic compound where LC 50 values by using methods of DLL, BBMB and BBM were 151, 52 and 60 ppm, respectively, while imidacloprid was the least toxic compound where LC 50 values methods of DLL, BBMB and BBM were 36111, 33792 and 36789, respectively.These compounds could be arranged as following: metaldehyde > abamectin > methomyl > profenofos > copper hydroxyl > chlorfenapyr > imidacloprid.Moreover, the study presented that toxicity of any tested compound was varied according to the method of application and method of BBMB was the most effective following:DLL and BBMwith all tested pesticides except copper hydroxyl was method of DLL was the most effective following: BBMB and BBM.