Impact of some plant seeds and kernels against adults of the white garden snail Theba pisana and the brown garden snail Eobania vermiculata (Gastropoda : Helicidae)‎ and their effects on activity of amylase and invertase enzymes

الملخص EN

The molluscicidal impact of anna apple seeds Malus domestica L., Sinai peach kernels Prunus persica L.

and amar apricot kernels Prunus armeniaca L.

were assessed against adults of the white garden snail Theba pisana (Müller) and the brown garden snail Eobania vermiculata (Müller) (Gastropoda: Helicidae ) using baits technique under laboratory conditions.

Data indicated that mortality percentages of T.

pisana and E.

vermiculata snails were (0.0, 0.0, 6.67 %) and (0.0, 0.0, 0.0 %) for apple seeds powder at concentrations 3.75, 7.50 and 15 %, respectively.

While, peach kernels powder mortalities were (6.67, 13.33, 33.33 %) and (0.0, 6.67, 13.33 %) at the same concentrations, respectively.

Whereas, mortality percentages of apricot kernels powder were (20.00, 53.33, 100 %) and (6.67, 13.33, 40.00 %) at the same concentrations, respectively, after three weeks of treatment.

Apricot kernels gave the highest molluscicidal effect, due to the presence of the amygdalin compound in apricot kernels more quantitative than peach kernels and apple seeds.

So, amygdalin compound was used against adults of T.

pisana and E.

vermiculata snails.

Results revealed that mortality percentages of adults of T.

pisana and E.

vermiculata snails using amygdalin compound separated from apricot kernels were (26.67, 40.00, 73.33, 100 %) and (0.00, 6.67, 13.33, 33.33 %) at concentrations 0.375, 0.750, 1.5 and 3 %, respectively after three weeks of treatment, due to E.

vermiculata snail more weight than T.

pisana snail.

As regards, high performance liquid chromatography (HPLC) used for verification of amygdalin compound separated from apricot kernels.

Finally, biochemical studies stated that decrease in the activity of amylase and invertase enzymes in adults of T.

pisana and E.

vermiculata snails treated with amygdalin separated from apricot kernels compared to control at concentrations 0.375, 0.750, 1.5 and 3 %.