CHEMICAL CONTROL OF WHITE CLOVER IN SOYBEAN CROPS

SCHUSTER, M. Z.; PELISSARI, A.; SZYMCZAK, L. S.; LUSTOSA, S. B. C.; MORAES, A.

doi:10.1590/S0100-83582015000300018

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Articles • Planta daninha 33 (3) • Jul-Sep 2015 • https://doi.org/10.1590/S0100-83582015000300018 copy

CHEMICAL CONTROL OF WHITE CLOVER IN SOYBEAN CROPS

Controle Químico do Trevo-Branco na Cultura da Soja

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

White clover is tolerant to many herbicides, making difficult a chemical control of this species during soybean crop establishments. The objective of this research was to select herbicides applied postemergence to control white clover in soybean and know the effects of this control on soybean yield. Seven herbicides were assessed, applied postemergence, with or without sequential application of glyphosate, and two control treatments (no control and total control of white clover). Glyphosate (with two sequential applications), fomesafen (with a sequential application of glyphosate), chlorimuron-ethyl and lactofen have shown a satisfactory control of white clover (above 80%). The lower control efficiency has resulted in lower production of soybeans.

herbicide; Integrated Crop-Livestock System; interference; Trifolium repens; Glycine max

Herbicide postemergence	Dry matter (g m ^-2 ) of white clover	Control efficiency of white clover (%)	White clover control angular coefficient (g m ^-2 day ^-1 )
	Glyphosate (720 g ha ^-1 )
	without	with					without	with	without	with
Bentazon	94.71 cA^1/	53.58 bB	22.55 fA	60.20 eB	0.359 cA	- 0.269 bB
Imazethapyr	100.89 bA	43.29 cB	16.25 gA	70.34 dB	0.508 bA	- 0.570 cB
Fomesafen	79.64 dA	29.54 dB	34.35 eA	83.77 cB	- 0.047 dA	- 1.055 dB
Imazamox + Bentazon	74.06 eA	52.62 bB	40.91 dA	61.37 eB	- 0.051 dA	- 0.516 cB
Glyphosate	49.39 fA	20.68 eB	63.64 cA	92.26 bB	- 0.600 eA	- 0.944 cB
Chlorimuron-ethyl	20.54 gA	20.19 eA	92.09 bA	92.60 bA	- 1.012 fA	- 1.169 eB
Lactofen	19.94 gA	14.64 eB	92.67 bA	97.82 abA	- 1.051 fA	- 1.404 eB
Without control	147.81 a	147.81 a	-	-	0.966 a	0.966 a
Total control (weeded)	0.00 h	0.00 f	-	-	-	-
CV (%)	4.01	5.52	37.81	18.06	15.62	12.37

Herbicide postemergence	Dry matter (g m ^-2 ) of other weeds	Soybean yield (Mg ha ^-1 )
	Glyphosate (720 g ha ^-1 )
	without	Soybean yield (Mg ha ^-1 )			with	without	with
Bentazon	05.19 dA^1/	0.60 eB	1.54 eA	1.75 fB
Imazethapyr	05.32 fA	0.47 fB	1.60 dA	2.91 dB
Fomesafen	14.95 eA	3.01 aB	1.61 dA	2.93 dB
Imazamox + Bentazon	27.16 cA	0.87 dB	1.67 dA	2.79 eB
Glyphosate	05.58 dA	0.52 eB	2.43 bA	3.24 cB
Chlorimuron-ethyl	35.19 bA	1.43 bB	0.98 fA	3.17 cB
Lactofen	49.16 aA	1.27 cB	1.83 cA	3.50 bB
Without control	2.40 fA	2.40 bA	0.39 gA	0.39 gA
Total control (weeded)	0.00 gA	0.00 fA	3.72 aA	3.72 aA
CV (%)	7.45	12.3	17.2	13.3

Sociedade Brasileira da Ciência das Plantas Daninhas Departamento de Fitotecnia - DFT, Universidade Federal de Viçosa - UFV, 36570-000 - Viçosa-MG - Brasil, Tel./Fax::(+55 31) 3899-2611 - Viçosa - MG - Brazil
E-mail: rpdaninha@gmail.com

Acompanhe os números deste periódico no seu leitor de RSS

[TFN01] 1/ For each variable, means followed by the same letters, lowercase in the columns and uppercase in the rows, do not differ by Duncan test in p < 0.01.