Persistence of auxinic herbicides applied on pasture and toxicity for succeeding crops

ANÉSIO, ARNON H.C.; SANTOS, MÁRCIA V.; SILVEIRA, RAUL R.; FERREIRA, EVANDER A.; SANTOS, JOSÉ B. DOS; SILVA, LEANDRO D. DA

doi:10.1590/0001-3765201820170134

ARNON H.C. ANÉSIO

Departamento de Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Campus JK, Rodovia MG 367, 5000, Alto do Jacuba, 39100-000 Diamantina, MG, Brazil

MÁRCIA V. SANTOS

Departamento de Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Campus JK, Rodovia MG 367, 5000, Alto do Jacuba, 39100-000 Diamantina, MG, Brazil

RAUL R. SILVEIRA

Departamento de Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Campus JK, Rodovia MG 367, 5000, Alto do Jacuba, 39100-000 Diamantina, MG, Brazil

EVANDER A. FERREIRA

Departamento de Agronomia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Campus JK, Rodovia MG 367, 5000, Alto do Jacuba, 39100-000 Diamantina, MG, Brazil

JOSÉ B. DOS SANTOS

Departamento de Agronomia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Campus JK, Rodovia MG 367, 5000, Alto do Jacuba, 39100-000 Diamantina, MG, Brazil

LEANDRO D. DA SILVA

Departamento de Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Campus JK, Rodovia MG 367, 5000, Alto do Jacuba, 39100-000 Diamantina, MG, Brazil

Correspondence to: Leandro Diego da Silva E-mail: leandro.silva@ufv.br

	40 DAA		80 DAA		280 DAA
	20 DAS	40 DAS	20 DAS	40 DAS	20 DAS	40 DAS
Plant intoxication	Intoxication scale^a
2,4-D + picloram	3	4	3	4	2	4
2,4-D	2	1	1	1	1	1
Triclopyr	2	1	1	1	1	1
Control	1	1	1	1	1	1
Chlorophyll	SPAD^b
2,4-D + picloram	36.5	0 b	45.3	0 b	39.1	0 b
2,4-D	40.5	40.2 a	43.6	42.0 a	38.7	48.8 a
Triclopyr	40.8	40.7 a	43.2	41.6 a	38.5	49.0 a
Control	44.3	46.4 a	44.9	42.4 a	38.9	49.7 a
CV^c %	13.1	14.3	6.11	11.2	6.71	8.53
Height	cm
2,4-D + picloram	8.02 a	0 c	8.82 a	0 b	11.1	0 b
2,4-D	6.05 b	18.6 b	6.80 b	20.1 a	11.2	29.4 a
Triclopyr	6.10 b	19.1 ab	6.70 b	19.3 a	11.8	29.3 a
Control	6.55 b	21.4 a	6.72 b	21.4 a	11.0	29.0 a
CV^c %	11.2	10.2	11.2	9.77	15.4	9.87
Shoot dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		0 b
2,4-D		19.3 a		23.3 a		28.3 a
Triclopyr		21.4 a		25.0 a		28.5 a
Control		21.1 a		23.4 a		27.5 a
CV^c %		11.6		8.86		11.4
Roots dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		0 b
2,4-D		8.25 a		11.1 a		14.8 a
Triclopyr		9.85 a		10.1 a		15.0 a
Control		9.67 a		12.4 a		15.1 a
CV^c %		17.0		19.3		17.7

	40 DAA		80 DAA		280 DAA
	20 DAS	40 DAS	20 DAS	40 DAS	20 DAS	40 DAS
Plant intoxication	Intoxication scale^a
2,4-D + picloram	4	4	3	4	3	4
2,4-D	2	1	1	1	1	1
Triclopyr	1	1	1	1	1	1
Control	1	1	1	1	1	1
Chlorophyll	SPAD^b
2,4-D + picloram	32.6 b	0 b	26.2 b	0 b	25.5 b	0 b
2,4-D	33.2 b	40.9 a	36.8 a	39.4 a	39.9 a	40.4 a
Triclopyr	39.7 a	42.3 a	36.6 a	39.7 a	40.2 a	41.0 a
Control	42.1 a	41.5 a	39.0 a	39.1 a	39.8 a	39.7 a
CV^c %	6.22	9.19	5.56	5.37	9.32	7.36
Height	cm
2,4-D + picloram	3.95 b	0 b	6.82 b	0 b	19.1 b	0 b
2,4-D	13.4 a	49.1 a	14.5 a	45.3 a	25.3 a	51.6 a
Triclopyr	13.6 a	49.4 a	13.7 a	45.8 a	26.1 a	53.0 a
Control	12.9 a	49.2 a	13.8 a	45.8 a	24.9 a	52.1 a
CV^c %	12.3	9.77	7.66	12.2	12.3	12.2
Shoot dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		0 b
2,4-D		26.4 a		31.5 a		34.9 a
Triclopyr		26.7 a		31.0 a		34.4 a
Control		27.8 a		31.3 a		34.0 a
CV^c %		8.43		9.13		9.65
Roots dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		0 b
2,4-D		14.2 a		16.9 a		15.2 a
Triclopyr		15.1 a		16.3 a		15.7 a
Control		15.2 a		16.8 a		14.9 a
CV^c %		16.9		9.34		16.4

	40 DAA		80 DAA		280 DAA
	20 DAS	40 DAS	20 DAS	40 DAS	20 DAS	40 DAS
Plant intoxication	Intoxication scale^a
2,4-D + picloram	3	4	3	4	3	4
2,4-D	2	2	1	1	1	1
Triclopyr	1	1	1	1	1	1
Control	1	1	1	1	1	1
Chlorophyll	SPAD^b
2,4-D + picloram	22.9 c	0 d	21.5 b	0 b	19.8 b	0 b
2,4-D	30.4 b	31.2 b	34.3 a	35.3 a	44.9 a	43.2 a
Triclopyr	30.7 b	29.9 c	33.4 a	35.7 a	44.7 a	43.7 a
Control	36.1 a	35.8 a	36.2 a	35.0 a	47.0 a	43.5 a
CV^c %	6.16	8.02	7.94	6.60	12.60	8.38
Height	cm
2,4-D + picloram	2.97 b	0 b	12.9	0 b	15.9	0 b
2,4-D	13.3 a	30.6 a	14.2	29.7 a	16.1	43.9 a
Triclopyr	13.9 a	31.6 a	14.1	29.1 a	16.6	44.1 a
Control	13.4 a	31.7 a	13.6	28.5 a	17.2	42.9 a
CV^c %	8.78	11.2	8.78	10.2	10.2	9.87
Shoot dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		0 b
2,4-D		17.4 a		20.9 a		24.7 a
Triclopyr		19.1 a		19.0 a		25.0 a
Control		20.1 a		19.7 a		25.2 a
CV^c %		9.96		9.26		9.76
Roots dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		0 b
2,4-D		9.87 a		10.7 a		13.2 a
Triclopyr		10.9 a		11.5 a		14.6 a
Control		10.7 a		11.9 a		13.2 a
CV^c %		7.42		13.7		17.3

	40 DAA		80 DAA		280 DAA
	20 DAS	40 DAS	20 DAS	40 DAS	20 DAS	40 DAS
Plant intoxication	Intoxication scale^a
2,4-D + picloram	4	4	3	4	2	4
2,4-D	2	2	1	1	1	1
Triclopyr	2	1	1	1	1	1
Control	1	1	1	1	1	1
Chlorophyll content	SPAD^b
2,4-D + picloram	25.5 c	0 c	26.4 b	0 b	36.8	0 b
2,4-D	28.3 b	31.0 b	34.3 a	32.5 a	39.2	43.1 a
Triclopyr	28.7 b	28.7 b	33.9 a	32.7 a	37.7	42.4 a
Control	32.8 a	33.9 a	35.1 a	33.2 a	39.0	43.5 a
CV^c %	7.18	6.82	6.95	7.42	6.50	8.81
Height	cm
2,4-D + picloram	0.95 b	0 b	0.90 b	0 b	3.90	0 b
2,4-D	2.45 a	15.4 a	2.55 a	14.4 a	4.12	17.1 a
Triclopyr	2.57 a	15.5 a	2.57 a	15.7 a	3.97	16.6 a
Control	2.45 a	16.2 a	2.35 a	14.9 a	4.22	17.1 a
CV^c %	8.87	11.2	14.2	11.2	9.65	15.2
Shoot dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		0 b
2,4-D		12.9 a		14.2 a		16.8 a
Triclopyr		14.8 a		15.1 a		17.5 a
Control		14.6 a		13.7 a		16.8 a
CV^c %		18.4		18.4		13.3
Roots dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		0 b
2,4-D		8.20 a		8.50 a		9.01 a
Triclopyr		8.62 a		8.87 a		9.34 a
Control		8.32 a		8.10 a		8.93 a
CV^c %		6.21		18.0		21.5

	40 DAA		80 DAA		280 DAA
	20 DAS	40 DAS	20 DAS	40 DAS	20 DAS	40 DAS
Plant intoxication	Intoxication scale^a
2,4-D + picloram	4	4	3	4	2	3
2,4-D	2	1	1	1	1	1
Triclopyr	1	1	1	1	1	1
Control	1	1	1	1	1	1
Chlorophyll	SPAD^b
2,4-D + picloram	0 c	0 b	29.5 b	0 b	35.1 b	17.5 b
2,4-D	32.0 b	44.9 a	43.7 a	42.2 a	46.3 a	44.1 a
Triclopyr	34.2 b	44.6 a	44.0 a	44.3 a	45.9 a	43.9 a
Control	42.4 a	45.3 a	42.5 a	43.0 a	46.0 a	43.1 a
CV^c %	5.57	4.53	3.74	10.3	11.5	8.91
Height	cm
2,4-D + picloram	0 b	0 b	13.02	0 b	15.90	26.15 b
2,4-D	13.30 a	26.22 a	13.17	26.42 a	16.45	31.52 a
Triclopyr	13.40 a	25.37 a	13.17	26.30 a	16.57	31.95 a
Control	13.07 a	27.07 a	13.80	27.27 a	16.37	32.62 a
CV^c %	10.23	8.78	17.54	9.65	14.22	9.78
Shoot dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		16.6 b
2,4-D		20.7 a		23.8 a		26.4 a
Triclopyr		20.4 a		25.3 a		25.7 a
Control		20.5 a		26.7 a		27.3 a
CV^c %		9.61		9.52		10.4
Roots dry weight	g pot^‒1
2,4-D + picloram		0 b		0 b		10.3
2,4-D		10.3 a		12.7 a		13.7
Triclopyr		10.0 a		13.4 a		13.7
Control		10.7 a		12.1 a		13.2
CV^c %		15.2		19.5		15.1

	40 DAA		80 DAA		280 DAA
	20 DAS	40 DAS	20 DAS	40 DAS	20 DAS	40 DAS
Plant intoxication	Intoxication scale^a
2,4-D + picloram	2	1	1	1	1	1
2,4-D	1	1	1	1	1	1
Triclopyr	1	1	1	1	1	1
Control	1	1	1	1	1	1
Chlorophyll	SPAD^b
2,4-D + picloram	14.2 b	23.5 b	17.0 b	28.9	43.2	46.4
2,4-D	32.9 a	30.9 a	30.4 a	29.5	42.0	43.1
Triclopyr	30.5 a	30.7 a	29.3 a	30.1	43.7	44.8
Control	34.7 a	32.1 a	30.1 a	30.3	43.4	43.4
CV^c %	18.8	8.50	10.1	5.08	7.88	5.10
Height	cm
2,4-D + picloram	21.4	53.1	21.6	49.7	26.1	55.2
2,4-D	21.8	50.8	21.0	49.3	26.7	54.5
Triclopyr	20.2	50.2	21.6	49.1	27.0	55.1
Control	22.9	51.9	23.0	48.6	26.7	55.9
CV^c %	10.2	9.44	9.76	7.65	9.76	9.87
Shoot dry weight	g pot^‒1
2,4-D + picloram		31.9		37.0		39.2
2,4-D		31.0		35.0		40.3
Triclopyr		31.1		35.9		40.8
Control		30.5		36.4		39.8
CV^c %		7.22		6.89		7.01
Roots dry weight	g pot^‒1
2,4-D + picloram		17.2		19.4		23.0
2,4-D		16.5		18.2		20.4
Triclopyr		17.1		18.1		20.3
Control		16.6		18.5		21.4
CV^c %		12.3		6.33		9.75

	40 DAA		80 DAA		280 DAA
	20 DAS	40 DAS	20 DAS	40 DAS	20 DAS	40 DAS
Plant intoxication	Intoxication scale^a
2,4-D + picloram	2	1	1	1	1	1
2,4-D	1	1	1	1	1	1
Triclopyr	1	1	1	1	1	1
Control	1	1	1	1	1	1
Chlorophyll content	SPAD^b
2,4-D + picloram	19.7 b	19.9 b	20.2 b	19.5 b	39.2	35.0
2,4-D	24.9 a	25.8 a	23.8 a	23.7 a	40.7	35.6
Triclopyr	26.0 a	26.5 a	24.0 a	25.1 a	41.1	35.4
Control	25.7 a	28.1 a	24.2 a	24.4 a	41.3	36.6
CV^c %	4.17	11.0	4.03	9.80	9.10	12.0
Height	cm
2,4-D + picloram	16.2	42.0	16.4	33.9	27.2	54.2
2,4-D	16.5	41.5	16.0	32.3	28.3	55.5
Triclopyr	16.2	40.1	16.1	32.0	27.7	53.7
Control	16.4	42.9	16.1	32.5	28.7	54.9
CV^c %	6.76	8.76	9.87	9.80	6.79	9.88
Shoot dry weight	g pot^‒1
2,4-D + picloram		24.9		31.1		34.8
2,4-D		28.4		28.6		35.2
Triclopyr		28.3		28.7		35.5
Control		28.2		29.5		34.8
CV^c %		14.2		11.7		8.91
Roots dry weight	g pot^‒1
2,4-D + picloram		13.1		16.3		18.8
2,4-D		15.0		16.4		18.8
Triclopyr		15.6		16.3		18.4
Control		15.4		17.1		18.9
CV^c %		11.6		6.98		6.03

[1] Correspondence to: Leandro Diego da Silva E-mail: leandro.silva@ufv.br

pH (H₂O)	P	K	Ca²⁺	Mg²⁺	Al³⁺	H+Al	BS^a	OM^b	Clay	Sand
pH (H₂O)	mg dm^‒3		cmolc dm^‒3				dag kg^‒1		%
5.12	1.02	25.3	0.40	0.20	0.76	5.20	0.66	0.70	47	53

Brasil

Brasil

Persistence of auxinic herbicides applied on pasture and toxicity for succeeding crops^* * This work is part of the dissertation of the first author - PPGZOO/UFVJM.

ABSTRACT

Brasil

Brasil

Persistence of auxinic herbicides applied on pasture and toxicity for succeeding crops* * This work is part of the dissertation of the first author - PPGZOO/UFVJM.

ABSTRACT

Persistence of auxinic herbicides applied on pasture and toxicity for succeeding crops^* * This work is part of the dissertation of the first author - PPGZOO/UFVJM.