INTERVAL BETWEEN SEQUENTIAL HERBICIDE TREATMENTS FOR SOURGRASS MANAGEMENT

MENDES, RAFAEL ROMERO; TAKANO, HUDSON KAGUEYAMA; BIFFE, DENIS FERNANDO; CONSTANTIN, JAMIL; OLIVEIRA JUNIOR, RUBEM SILVÉRIO DE

doi:10.1590/1983-21252020v33n301rc

RAFAEL ROMERO MENDES ^**Corresponding author

Agricultural Sciences Department, Universidade Estadual de Maringá, Maringá, PR, Brazil; rafaromero.mendes@gmail.com, denisbiffe@gmail.com, constantin@teracom.com.br, rubem.oliveirajr@gmail.com.

https://orcid.org/0000-0003-4404-8826

HUDSON KAGUEYAMA TAKANO

Colorado State University, Fort Collins, CO, United States of America; hudsontakano@gmail.com.

https://orcid.org/0000-0002-8018-3868

DENIS FERNANDO BIFFE

Agricultural Sciences Department, Universidade Estadual de Maringá, Maringá, PR, Brazil; rafaromero.mendes@gmail.com, denisbiffe@gmail.com, constantin@teracom.com.br, rubem.oliveirajr@gmail.com.

https://orcid.org/0000-0002-2036-3429

JAMIL CONSTANTIN

Agricultural Sciences Department, Universidade Estadual de Maringá, Maringá, PR, Brazil; rafaromero.mendes@gmail.com, denisbiffe@gmail.com, constantin@teracom.com.br, rubem.oliveirajr@gmail.com.

https://orcid.org/0000-0001-6610-699X

RUBEM SILVÉRIO DE OLIVEIRA JUNIOR

Agricultural Sciences Department, Universidade Estadual de Maringá, Maringá, PR, Brazil; rafaromero.mendes@gmail.com, denisbiffe@gmail.com, constantin@teracom.com.br, rubem.oliveirajr@gmail.com.

https://orcid.org/0000-0002-5222-8010

*Corresponding author

Interval (days)	14 DA.1^stA				21 DA.1^stA				28 DA.1^stA
Interval (days)	Paraquat		Gly+cle		Paraquat		Gly+cle		Paraquat		Gly+cle
10	78.8	a	94.0	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	81.3	b⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	87.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	61.3	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	87.5	bc⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
17	75.0	ab	72.5	b	96.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	87.8	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	68.8	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	93.8	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
24	71.3	b	72.5	b	61.3	c	61.3	b	68.3	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	78.8	bc⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
31	72.5	b	71.3	b	61.3	c	61.3	b	43.8	b	42.5	c
38	72.5	b	70.0	b	61.3	c	62.5	b	41.3	b	48.8	c
45	72.8	b	72.5	b	62.5	c	61.3	b	42.5	b	42.5	c
Non-sequential	73.75				58.75				42.5
Interval (days)	35 DA.1^stA				42 DA.1^stA				49 DA.1^stA
Interval (days)	Paraquat		Gly+cle		Paraquat		Gly+cle		Paraquat		Gly+cle
10	57.5	ab⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	85.8	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	46.3	bc	83.8	ab⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	35.0	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	77.3	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
17	50.0	b	95.8	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	62.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	90.0	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	32.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	79.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
24	65.3	a⁽⁺⁾	95.8	a⁽⁺⁾	57.5	ab⁽⁺⁾	94.3	a⁽⁺⁾	37.5	a⁽⁺⁾	80.5	a⁽⁺⁾
31	62.5	a⁽⁺⁾	62.5	b⁽⁺⁾	45.0	cd	71.8	b⁽⁺⁾	23.8	a	70.0	a⁽⁺⁾
38	40.0	b	41.3	c	60.0	ab⁽⁺⁾	55.0	c⁽⁺⁾	30.0	a	78.8	a⁽⁺⁾
45	38.8	b	41.5	c	30.0	d	32.5	d	35.0	a⁽⁺⁾	80.0	a⁽⁺⁾
Non-sequential	40				30				10

Interval (days)	14 DA.1^stA				21 DA.1^stA				28 DA.1^stA
Interval (days)	Paraquat		Gly+cle		Paraquat		Gly+cle		Paraquat		Gly+cle
10	0.0	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	6.0	a	10.5	a^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	5.5	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	17.5	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	3.8	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
17	5.0	a	4.5	ab	0.0	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	9.5	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
24	5.0	a	5.0	ab	7.8	ab^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	6.0	ab^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	11.0	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	c^(-)
31	4.0	a	5.5	ab	8.0	ab^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	8.0	a^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	30.0	a	28.0	a
38	4.5	a	4.0	b	6.8	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	6.8	ab^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	27.5	a	30.0	a
45	5.0	a	4.0	b	7.3	ab^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	6.5	ab^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	30.0	a	30.0	a
Non-sequential	6.0				36.0				30.0
Interval (days)	35 DA.1^stA	35 DA.lnA				42 DA.1^stA				49 DA.1^stA
Interval (days)	Paraquat		Gly+cle		Paraquat		Gly+cle		Paraquat			Gly+cle
10	30.0	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	5.0	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	50.0	a^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	10.5	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	56.3	ab	13.8	a^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
17	17.5	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	5.0	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	42.5	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	8.0	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	47.5	b	21.3	a^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
24	11.8	d^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	1.3	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	18.8	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	5.0	bc^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	51.3	ab	16.3	a^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
31	11.3	d^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	20.0	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	1.3	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	65.0	a	18.0	a^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
38	36.3	a	38.8	a	8.8	d^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	d^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	22.5	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	2.5	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
45	37.5	a	37.5	a	41.3	b^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	40.8	a^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	10.0	d^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	c^(-) (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
Non-sequential	42.5				63.8				66.3

Tiller-height-interval (cm)	16 DA.1^stA				32 DA.1^stA				45 DA.1^stA
Tiller-height-interval (cm)	Paraquat		Gly+cle		Paraquat		Gly+cle		Paraquat		Gly+cle
2 - 5	71.3	a	72.5	a	77.25	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	87.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	61.3	b⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	87.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
6 - 10	70.0	a	72.5	a	57.5	b	0.0	b	96.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	87.8	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
11 - 20	71.3	a	71.3	a	58.75	b	6.0	b	40.5	c	42.8	b
21 - 30	71.3	a	71.3	a	58.75	b	8.0	b	42.8	c	40.5	b
>30	71.3	a	73.8	a	57.5	b	6.8	b	42.8	c	42.8	b
Non-sequential	71.25				61.25				42.5
Tiller-height-interval (cm)	57 DA.1^stA				65 DA.1^stA				80 DA.1^stA
Tiller-height-interval (cm)	Paraquat		Gly+cle		Paraquat		Gly+cle		Paraquat			Gly+cle
2 - 5	57.5	b⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	80.8	b⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	46.3	ab	83.75	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	35.0	b	77.3	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
6 - 10	68.8	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	93.8	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	50.0	ab	95.75	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	57.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	90.0	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
11 - 20	68.3	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	78.8	b⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	61.3	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	95.75	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	57.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	94.3	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
21 - 30	39.5	c (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	40.3	c (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	62.5	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	68.75	b⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	45.0	ab⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	71.8	b⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
>30	40.3	c	39.5	c	32.5	b	33.75	c	60.0	a⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	67.5	b⁽⁺⁾ (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
Non-sequential	41.5				32.5				37.5

Tiller-height-interval (cm)	16 DA.1^stA				32 DA.1^stA				45 DA.1^stA
Tiller-height-interval (cm)	Paraquat		Gly+cle		Paraquat		Gly+cle		Paraquat		Gly+cle
2 - 5	0.0	a	0.5	a	10.5	a⁽⁺⁾ (+) higher or	5.5	b	17.5	a	6.8	b^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
6 - 10	1.0	a	0.5	a	7.5	b⁽⁺⁾ (+) higher or	7.5	a⁽⁺⁾ (+) higher or	0.0	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
11 - 20	0.5	a	0.5	a	6.8	b	7.5	a⁽⁺⁾ (+) higher or	12.3	b	13.0	a
21 - 30	0.0	a	0.5	a	6.8	b	6.8	ab	11.8	b	12.3	a
>30	0.5	a	0.5	a	7.5	b⁽⁺⁾ (+) higher or	6.8	ab	13.0	b	11.8	a
Non-sequential	0.5				4.5				13
Tiller-height-interval (cm)	57 DA.1^stA				65 DA.1^stA				80 DA.1^stA
Tiller-height-interval (cm)	Paraquat		Gly+cle		Paraquat		Gly+cle		Paraquat			Gly+cle
2 - 5	30.0	a (+) higher than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	5.0	b^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	50.0	a⁽⁺⁾ (+) higher or	10.5	b^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	56.3	a	13.8	a^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
6 - 10	9.5	b^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	17.5	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	5.0	bc^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	42.5	b^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	8.0	ab^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
11 - 20	3.0	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	11.8	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	1.3	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	18.8	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	5.0	b^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
21 - 30	27.5	a (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	26.3	a (-) lower than nonsequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	5.0	d^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	0.0	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	20.0	c^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.	1.3	b^(-) (-) lower than non-sequential treatment by Dunnett’s test (5% probability). DA.1stA: days after the first application. Gly: glyphosate, cle: clethodim.
>30	26.3	a	27.5	a	38.8	b	37.5	a	6.8	d(-)	0.0	c(-)
Non-sequential	27.5				38.75				63.75

[1] *Corresponding author

Brasil

Brasil

INTERVAL BETWEEN SEQUENTIAL HERBICIDE TREATMENTS FOR SOURGRASS MANAGEMENT

INTERVALO ENTRE APLICAÇÕES SEQUENCIAIS PARA O CONTROLE DE CAPIM-AMARGOSO

ABSTRACT