Table 5.

Kinetics for fipronil and thiobencarb degradation in soil by MA.

Pesticide	Pesticide concentration (μg/g)	Soil Moisture (%)	Soil sterility	Isolate inoculation*	D (%) ± SD**	t1/2 (day)***	R2****	k***** ± SE (day−1)	k******(+/−) ± SE
Fipronil	15	100	Sterile	+	80.48a ± 0.27	6	0.99	0.118 ± 0.000	2.56 ± 0.09
				−	49.95g ± 0.96	15	0.97	0.046 ± 0.002
			Non-sterile	+	75.25ab ± 2.23	7	0.99	0.093 ± 0.004	1.19 ± 0.07
				−	66.90cd ± 2.09	9	0.96	0.078 ± 0.003
		20	Sterile	+	64.89de ± 0.57	9	0.99	0.076 ± 0.002	14.15 ± 1.09
				−	7.23j ± 0.68	129	0.89	0.005 ± 0.000
			Non-sterile	+	33.94h ± 1.21	23	0.93	0.030 ± 0.002	1.03 ± 0.12
				−	33.33h ± 1.94	24	0.90	0.029 ± 0.003
	150	100	Sterile	+	73.53bc ± 2.11	7	0.99	0.103 ± 0.003	7.72 ± 0.41
				−	17.53i ± 0.43	52	0.94	0.013 ± 0.001
			Non-sterile	+	60.86de ± 1.93	10	0.99	0.071 ± 0.002	0.91 ± 0.04
				−	65.98d ± 1.91	9	0.99	0.078 ± 0.002
		20	Sterile	+	53.88fg ± 2.02	12	0.97	0.059 ± 0.003	9.01 ± 0.72
				−	8.93j ± 0.68	105	0.91	0.007 ± 0.000
			Non-sterile	+	58.76ef ± 2.83	12	0.98	0.060 ± 0.002	1.91 ± 0.19
				−	35.25h ± 3.45	22	0.98	0.031 ± 0.003
Thiobencarb	15	100	Sterile	+	58.10d ± 2.47	10	0.98	0.067 ± 0.003	4.46 ± 1.20
				−	19.04i ± 0.62	46	0.98	0.015 ± 0.004
			Non-sterile	+	50.25ef ± 0.75	13	0.95	0.052 ± 0.002	1.05 ± 0.05
				−	52.05e ± 0.77	13	0.99	0.052 ± 0.001
		20	Sterile	+	46.39f ± 0.83	15	0.99	0.046 ± 0.001	5.13 ± 0.42
				−	11.05j ± 0.65	78	0.85	0.009 ± 0.001
			Non-sterile	+	60.81d ± 0.79	10	0.99	0.068 ± 0.001	1.52 ± 0.06
				−	47.00f ± 2.14	15	0.90	0.045 ± 0.002
	150	100	Sterile	+	84.24a ± 0.94	5	0.99	0.141 ± 0.004	3.92 ± 0.13
				−	39.48g ± 1.03	19	0.99	0.036 ± 0.001
			Non-sterile	+	77.27b ± 0.17	4	0.93	0.156 ± 0.014	1.19 ± 0.11
				−	82.51a ± 0.75	5	0.99	0.131 ± 0.002
		20	Sterile	+	47.30f ± 1.46	16	0.98	0.045 ± 0.001	4.37 ± 0.16
				−	13.10j ± 0.61	68	0.97	0.010 ± 0.000
			Non-sterile	+	70.09c ± 2.39	7	0.97	0.094 ± 0.005	4.12 ± 0.23
				−	27.53h ± 0.64	30	0.99	0.023 ± 0.001

SE: Standard error (n = 3). SD: Standard deviation (n = 3).

^*+ and − indicate soils with and without isolate inoculation, respectively.

^**Degradation after 14 days. Values with the same lowercase superscript letters in the column do not defer significantly (Tukey’s HSD post hoc test, p = 0.05).

^***Half-lives of fipronil and thiobencarb are calculated based on the first-order exponential decay model (Torabi et al., 2017).

^****The first-order exponential decay model coefficient of determination (Torabi et al., 2017).

^*****Fipronil and thiobencarb degradation rates based on the first-order exponential decay model (Torabi et al., 2017).

^******The contribution of MA to the degradation rates of fipronil and thiobencarb (Equation 3). Standard errors are calculated via the error propagation method.