Toxicity, joint action effect, and enzymatic assays of abamectin, chlorfenapyr, and pyridaben against the two-spotted spider mite Tetranychus urticae

The Journal of Basic and Applied Zoology

Table 2 Acaricidal activity of technical (abamectin, chlorfenapyr, and pyridaben) and formulated (Agromectin, Challenger, and Sanmite) acaricides against adult females of two-spotted spider mite T. urticae after 24 h by slide-dip technique

Acaricide	LC₂₅^a (mg/L)	95% confidence limits		LC₅₀^a (mg/L)	95% confidence limits		Slope^b ± SE	Intercept^c ± SE	(χ²)^d
Acaricide	LC₂₅^a (mg/L)	Lower	Upper		Lower	Upper	Slope^b ± SE	Intercept^c ± SE	(χ²)^d
Abamectin	0.33	0.128	0.67	5.39	3.25	8.19	0.62 ± 0.05	− 0.44 ± 0.08	22.11
Chlorfenapyr	2.10	0.761	4.31	106.51	62.27	203.51	0.39 ± 0.05	− 0.80 ± 0.08	9.26
Pyridaben	168.58	121.40	221.67	690.23	514.19	1009.66	1.11 ± 0.12	− 3.33 ± 0.26	7.61
Agromectin	0.054	0.006	0.108	0.94	0.39	1.82	0.475 ± 0.051	− 0.12 ± 0.07	1.91
Challenger	0.36	0.05	1.22	73.65	29.53	260.33	0.293 ± 0.053	− 0.54 ± 0.081	0.49
Sanmite	5.85	1.81	14.35	160.60	56.32	707.39	0.33 ± 0.031	− 0.949 ± 0.09	5.89

^aLethal concentration, 25% or 50%. The concentration value for a pesticide that is required to kill 25% or 50% of the members of tested eggs after a specified test duration
^bSlope of the concentration-mortality regression line ± standard error
^cThe y-intercept of the regression line ± SE
^dChi-square goodness of fit test