Toxicity appraisement of methaldehyde, ferricol®, snail repellent tape® and sabzarang® (snail repellent paint) on land snails (Xeropicta derbentina), (Xeropicta krynickii)

Different control methods have been applied to control the land snail (Xeropicta derbentina and Xeropicta krynickii) but the chemical method is realized to be the most effective method to control this pest. The main goal of this work was to determine the efficacy of methaldehyde Ferricol, Snail repellent tape and Snail repellent paint (Sabzrang) on this pest. Methaldehyde, Ferricol were used as bait around citrus trees and Snail repellent tape and Snail repellent paint rolled up around main stem of the citrus trees. The life snails on citrus trees were monitored at 2, 15, 29, 36, 68 and 98 days after treatments. Analysis of variance showed that there were significant differences between treatments and control,and also significant differences were found among treatments (p < 0.01). LSD and Tukay-Test among the above treatments has shown that repellent band and methaldehyde with 5 ± 1.3 and 10.6 ± 0.9 percentage of the alive snail on trees, respectively, were more effective than repellent color and biological toxin with 14.2 ± 2.6 and 31.3 ± 3.9 percentage alive snail on citrus trees and significant differences with control, respectively. The control efficacies of the methaldehyde and Ferricol were91.87 and 82.63%, respectively; also the total control efficacies of the Snail repellent tape and Snail repellent paint were 95.22 and 82.26%, respectively, after 2, 15, 29, 36, 68 and 98 days of post treatment.Therefore the Snail repellent tape and methaldehyde were better than the other treatments for the management of land snail population