Table 2.

In vivo toxicity of different components of plant products against the redia larva of Fasciola gigantica.

Exposure	Larvicidal (mg /L)	LC50	LCL	UCL	Slope value	t-ratio	g-value	Heterogeneity
2 h	Citral	59.61	42.39	131.00	1.55 ± 0.36	4.24	0.21	0.12
	Ferulic acid	3.06	2.41	4.67	2.10 ± 0.38	5.43	0.13	0.16
	Umbelliferone	3.70	2.87	5.72	1.56 ± 0.34	4.54	0.18	0.11
	Azadirachtin	1.00	0.52	25.19	0.95 ± 0.35	2.82	0.48	0.14
	Allicin	5.89	3.55	21.65	9.99 ± 0.35	9.80	0.26	0.15
4 h	Citral	39.28	29.88	65.66	1.46 ± 0.34	4.31	0.20	0.18
	Ferulic acid	2.23	1.72	3.53	1.51 ± 0.34	4.41	0.19	0.11
	Umbelliferone	2.48	1.83	3.46	1.34 ± 0.32	4.07	0.23	0.13
	Azadirachtin	0.35	0.25	0.72	1.13 ± 0.32	3.44	0.32	0.10
	Allicin	2.14	1.46	3.42	1.01 ± 0.24	4.22	0.21	0.12
6 h	Citral	26.29	19.48	37.97	1.31 ± 0.32	3.99	0.24	0.23
	Ferulic acid	1.43	1.01	2.02	1.25 ± 0.33	3.74	0.27	0.13
	Umbelliferone	1.52	0.98	1.97	1.52 ± 0.33	4.53	0.18	0.16
	Azadirachtin	0.21	0.13	0.32	1.05 ± 0.32	3.27	0.35	0.11
	Allicin	0.94	0.49	1.35	1.09 ± 0.24	4.43	0.19	0.18
8 h	Citral	13.21	5.35	18.85	1.10 ± 0.32	3.37	0.33	0.20
	Ferulic acid	0.76	0.49	0.98	1.79 ± 0.36	4.94	0.15	0.14
	Umbelliferone	1.11	0.63	1.47	1.64 ± 0.35	4.70	0.17	0.17
	Azadirachtin	0.11	0.06	0.15	1.57 ± 0.34	4.57	0.18	0.25
	Allicin	0.66	0.40	0.90	1.61 ± 0.28	5.67	0.11	0.35

LCL: lower confidence limits, UCL: upper confidence limits. Six batches of 15 snails were exposed to different concentrations of the above molluscicidal treatments. Mortality of redia was recorded every 2 h. Concentrations given are the final concentration (W/V) in the glass aquarium water. Significant negative regression (P < 0.05) was observed between exposure time and LC₅₀ of treatments. TS: testing significant of the regression coefficient. Citral: 12.06⁺, ferulic acid: 29.31⁺, umbelliferone: 7.76⁺⁺, azadirachtin: 15.58⁺⁺, allicin: 19.19⁺⁺: linear regression between x and y, ⁺⁺: nonlinear regression.