UTTAR PRADESH JOURNAL OF ZOOLOGY

Effect of different concentrations of four inorganic salts (sodium hydroxide, potassium bromide, sodium nitrite, and copper sulfate) against the terrestrial snails, Monacha obstructa and Eobania vermiculata, was evaluated under laboratory and field conditions. Results commonly revealed that the tested materials exhibiting noticeable land snails impacts under laboratory and field conditions. In laboratory experiments, mortality percentages increased with the increase of concentration. Sodium nitrite was the most effective compound followed by copper sulphate, potassium bromide, sodium hydroxide for Monacha obstructa recording mortality percentages of 86.67, 80.00, 80.00 and 73.00%, respectively. The corresponding LC₅₀ values were 8.69, 0.1548, 1.2966 and 4.7173% for the four inorganic salts, respectively. It was obvious that copper sulphate was the most effective followed by sodium nitrite sodium hydroxide, potassium bromide for Eobania vermiculata, where the mortality rate of infested snail reached 86.67, 80,80 and 60%, respectively at the highest concentrations of four salts. The corresponding LC₅₀ values were 0.6901, 40.3541, 19.3519 and 12.037% for the four inorganic salts, respectively. It is interest to note that the used inorganic salts completely supressed egg production. Under field conditions, copper sulfate was more potent against Eobania vermiculata than sodium nitrite, but the reverse took place in case of Monacha obstructa.