Evaluating the Efficiency of Some Different Chemical Compounds Against Monacha Cartusiana under Field Conditions at Sharkia Governorate.

 The toxicity effect of five pesticides belonging to different chemical groups as metaldehyde 5% (Acetaldehyde), methomyl 20% SL, methomyl  24% SL, methiocarb 2% RB(G) (Carbamate)   and  Bacillus thuringiensis  (Biocide) 6.5%WP were tested in the field using two different methods as baits and spray technique at a recommended field rates against  land snail Monacha cartusiana (Muller) in two fields cultivated with Egyptian clover and lettuce intercropping on cabbage at Kafr-Attallah, Zagazig district Sharkia Governorate during the activity period in April 2014.Results revealed that the poisons baits  of metaldehyde, methomyl 20%, methomyl 24% and methiocarb showed the greatest effectiveness in reducing snails numbers than B.thuringiensis along the experimental period (21day).The molluscicidalefficacy of the five tested compounds according to reduction percentages for M. cartusiana can be arranged  in descending order as follows: metaldehyde, methomyl 20%, methomyl 24% methiocarb and B.thuringiensis. On the other hand, the tested compounds (methomyl 20%, methomyl  24% and  B. thuringiensis) when used as spray technique, methomyl 24% proved to be slightly more effective compound than methomyl 20%, while B. thuringiensis was found to be the lowest toxic one, in this respect against M. cartusiana. This study showed that all tested compounds were more active when used as baits than spray method except B. thuringiensis.