Assessment of molluscicidal and larvicidal activities of CuO nanoparticles on Biomphalaria alexandrina snails

Beni-Suef University Journal of Basic and Applied Sciences

Table 2 Survival rate (%) and mean shell diameter (mm) of juvenile B. alexandrina snails exposed to the sub-lethal concentrations of CuO NPs for 24 h/ week for 4 successive weeks followed by 4 weeks of recovery

Weeks	Control		LC₀ (4 mg\l)		LC₁₀ (15.6 mg\l)		LC₂₅ (27.18 mg\l)
Weeks	% Survival	Shell diameter ± SD	% Survival	Shell diameter ± SD	% Survival	Shell diameter ± SD	% Survival	Shell diameter ± SD
0	100	2.41 ± 0.37	100	2.41 ± 0.37	100	2.41 ± 0.37	100	2.41 ± 0.37
1	99	2.7 ± 0.21	90	2.6 ± 0.19	82	2.4 ± 0.1	75	2.6 ± 0.2
2	98	2.85 ± 0.13	87	2.8 ± 0.21	70	2.5 ± 0.2	50	2.7 ± 0.2
3	96	3.4 ± 0.12	80	2.9 ± 0.13	45	2.7 ± 0.21	25	2.8 ± 0.17
4	95	3.9 ± 0.12	70	3.1 ± 0.11	35	2.8 ± 0.23	5	2.9 ± 0.1
5	94	4.3 ± 0.3	50	3.5 ± 0.13	18	3.2 ± 0.12
6	90	4.9 ± 0.35	25	3.8 ± 0.1	5	3.3 ± 0.13
7	85	5.9 ± 0.15	15	4.1 ± 0.15
8	85	6.5 ± 0.12	5	4.3 ± 0.12
Mean	4.3 ± 1.38		*3.38 ± 0.14		*2.8 ± 0.98		*2.7 ± 0.67
Growth reduction % at 1st 4 weeks	47.7%		55%		86%		79.1%
Growth reduction% at 2nd 4 weeks	52.29%		87%		96%