TOXICITY OF CERTAIN COPPER FUNGICIDES AND OTHER PESTICIDES TO TERRESTRIAL SNAILS

Abstract

Toxicity of certain copper fungicides to the small garden snail, Theba pisana was evaluated fed on sprayed cabbage leaves at the concentrations of 0.5% , 0.25% and 0.125% . According to LT50 values. The obtained LT50 values were 4.67, 5.18 and 8.41 day, with copral; 5.62, 6.39. and 7.54 days for Kocide 2000. 5.47, 5.59 and 9.40 days for Galbin copper, respectively. Besides, molluscicidal efficacy of the copper fungicides, against the small garden snail, Theba pisana fed on sprayed lettuce leaves was carried out. The LT50 values expressed in were 2.67 for copper Acrobate (5% Cu, as copper oxychloride), 3.50 for Kocide 2000 (5% Cu, as copper hydroxide) and 2.17 for Galbine copper (5% Cu, as copper oxychloride + benalxyl). On the other hand, the toxicity of poisoned baits against the brown garden snail, Eobonia vermiculata was assessed. Baits of methomyl (2% a.i.), cadusafos (2% a.i.), carbendazim (2% a.i.), Copral (5% Cu), Kocide 2000 (5% Cu) and imidichlopride (2% a.i), gave LT50 values of 1.54, 6.19, 7.00, 4.39, 4.94 and 6.52 days, respectively. Toxicity of poison baits to the white sand snail, Helicella vestalis was assessed by baits of Lannate (methomyl) 2% a.i., Rugby (cadusafos) 2% a.i., Kocide 2000 Copper oxychloride (2% Cu), kemazed (carbendazim)., 2% a.i, and Confidor (imidichlopride) 2% a.i. The obtained LT50 values were 3.40, 6.48, 10.62, 6.10 and 8.73 days, respectively.