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 3 Acaricidal activity of technical (abamectin, chlorfenapyr, and pyridaben) and formulated (Agromectin, Challenger, and Sanmite) acaricides against adults of two-spotted spider mite T. urticae after 48 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	LC₅₀^a (mg/L)	Lower	Upper	Slope^b ± SE	Intercept^c ± SE	(χ²)^d
Abamectin	0.046	0.01	0.12	0.52	0.21	0.97	0.69 ± 0.07	− 0.15 ± 0.08	3.22
Chlorfenapyr	0.094	0.01	0.31	6.33	2.93	11.48	0.37 ± 0.45	− 0.79 ± 0.09	1.79
Pyridaben	0.282	0.04	0.89	37.64	19.64	74.48	0.32 ± 0.04	− 0.50 ± 0.08	2.62
Agromectin	0.036	0.013	0.137	0.561	0.25	1.013	0.69 ± 0.08	− 0.35 ± 0.08	8.17
Challenger	0.049	0.046	0.565	1.63	0.027	9.01	0.44 ± 0.05	− 0.09 ± 0.07	8.82
Sanmite	0.416	0.014	1.21	47.71	7.84	202.03	0.33 ± 0.03	− 0.55 ± 0.07	19.99

^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