Table 4.

Effect of C. viminalis leaves extract on B. alexandrina snails (number 30).

Time (day)	Number of snails	10 ppm		20 ppm		40 ppm
		Death	%	Death	%	Death	%
1	30	8	26.7	13	43.3	15	50
2	30	15	50	21	70	24	80
3	30	19	63.3	30	100	30	100
4	30	23	76.7	30	100	30	100
5	30	27	90	30	100	30	100