Table 6 Comparative acaricidal activity by vapor bioassays of benzaldehyde analogues with 2,3-dihyderoxybenzaldehyde against T. putrescentiae (^aEach chemical mixed at 9:1 ratio with 2,3-dihydroxybenzaldehyde.

Chemical	Each chemical with 2,3-dihydroxybenzaldehyde^a
	Observed values (μg/cm³)^b				Expected values (μg/cm³)^b
	LD₅₀ (95% CL)	LD₉₅ (95% CL)	Slope	χ² value	LD₅₀ (Wadley)^c	LD₉₅ (Wadley)^c	R₅₀ ^d	R₉₅ ^d	S₅₀ ^e	S₉₅ ^e
2-Methylbenzaldehyde	1.48 (1.12–1.90)	6.94 (5.17–9.01)	2.58 ± 0.38	4.275 (5, 0.511)	1.45	5.07	0.98	0.73	Add	Add
3-Methylbenzaldehyde	1.81 (1.42–2.25)	7.83 (6.20–11.52)	2.60 ± 0.36	9.079 (6, 0.169)	2.16	8.08	1.19	1.03	Add	Add
4-Methylbenzaldehyde	1.85 (1.52–2.28)	6.01 (4.62–9.14)	3.25 ± 0.45	2.480 (5, 0.779)	2.56	8.17	1.38	1.36	Add	Add
2,3-Dimethylbenzaldehyde	1.74 (1.37–2.13)	6.60 (5.18–9.11)	2.69 ± 0.39	4.671 (5, 0.457)	1.71	6.21	0.98	0.94	Add	Add
2,4-Dimethylbenzaldehyde	1.66 (1.28–1.98)	5.55 (4.21–7.85)	3.09 ± 0.43	6.376 (5, 0.271)	1.26	5.15	0.76	0.93	Add	Add
2,5-Dimethylbenzaldehyde	1.21 (0.96–1.54)	5.28 (4.04–7.96)	2.66 ± 0.43	3.785 (4, 0.436)	1.42	6.55	1.17	1.24	Add	Add
2,4,5-Trimethylbenzaldehyde	0.84 (0.56–1.11)	3.24 (2.14–4.77)	2.40 ± 0.39	6.401 (6, 0.380)	0.86	2.99	1.02	0.92	Add	Add

^bExpected LD₅₀ based on Wadley’s calculation model. ^cWadley’s calculation of expected LD₅₀ and LD₉₅. ^dSynergy ratio from Wadley’s calculation of expected LD₅₀ and LD₉₅. ^eDetermination of interaction of the mixture based on Wadley’s determination method: when R > 1.5, synergistic (Syn) interaction; when 1.5 ≥ R > 0.5, additive (Add) interaction; when R ≤ 0.5, antagonistic interaction).

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