Selectivity of Clomazone in Chemical Management of Weed in Cotton LL(r)
            Crop

Arantes, J.G.Z.; Constantin, J.; Oliveira Jr., R.S.; Braz, G.B.P.; Takano, H.K.; Gemelli, A.; Oliveira Neto, A.M.; Brugnera, P.

doi:10.1590/0100-83582015000200014

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Artigos • Planta daninha 33 (2) • Apr-Jun 2015 • https://doi.org/10.1590/0100-83582015000200014 linkcopy

Selectivity of Clomazone in Chemical Management of Weed in Cotton LL(r) Crop

Authorship SCIMAGO INSTITUTIONS RANKINGS

The ammonium-glufosinate is an herbicide with broad spectrum of weed control, but it has no residual control in the soil, which limits its usefulness when used alone in cotton crop and there is the need to combine different herbicides in more than one mode of application. The aim of this study was to evaluate the selectivity of different weed chemical control systems containing clomazone in LL(r) cotton crop. The triple mixtures in pre-emergence showed greater reduction potential in the size of the cotton plant. It is recommended to use mixtures of two pre-emergent herbicides in cotton, with application of S-metolachlor in over the top, followed by two post-emergence applications of glufosinate-ammonium. Pyrithiobac-sodium may be used on the first post-emergence application.

Gossypium hirsutum; modality of application; tank mixture; genetically modified crops

Tratamentos (nome comum)			Dose (g ha^-1)
Pré-emergência	Over the top	Pós-emergência	Pré-emergência	Pós-emergência
1.	-	AMGF / AMGF²^/	-	600 / 600
2.	-	AMGF + PYRI / AMGF²^/	-	600 + 42 / 600
3.	-	AMGF / AMGF / AMGF³^/	-	600 / 600 / 600
4. CLOM + DIUR	-	AMGF / AMGF²^/	600 + 750	600 / 600
5. CLOM + DIUR	-	AMGF + PYRI / AMGF²^/	600 + 750	600 + 42 / 600
6. CLOM + PROM	-	AMGF / AMGF²^/	600 + 750	600 / 600
7. CLOM + PROM	-	AMGF + PYRI / AMGF²^/	600 + 750	600 + 42 / 600
8. CLOM + TRIF + DIUR	-	AMGF / AMGF²^/	600 + 1200 + 750	600 / 600
9. CLOM + TRIF + DIUR	-	AMGF + PYRI / AMGF²^/	600 + 1200 + 750	600 + 42 / 600
10. CLOM + TRIF + PROM	-	AMGF / AMGF²^/	600 + 1200 + 750	600 / 600
11. CLOM + TRIF + PROM	-	AMGF + PYRI / AMGF²^/	600 + 1200 + 750	600 + 42 / 600
12. CLOM + DIUR	S-MET¹^/	AMGF / AMGF²^/	600 + 750	600 / 600
13. CLOM + DIUR	S-MET¹^/	AMGF + PYRI / AMGF²^/	600 + 750	600 + 42 / 600
14. CLOM + TRIF + DIUR	S-MET¹^/	AMGF / AMGF²^/	600 + 1200 + 750	600 / 600
15. CLOM + TRIF + DIUR	S-MET¹^/	AMGF + PYRI / AMGF²^/	600 + 1200 + 750	600 + 42 / 600
16. CLOM + PROM	S-MET¹^/	AMGF / AMGF²^/	600 + 750	600 / 600
17. CLOM + PROM	S-MET¹^/	AMGF + PYRI / AMGF²^/	600 + 750	600 + 42 / 600
18. CLOM + TRIF + PROM	S-MET¹^/	AMGF / AMGF²^/	600 + 1200 + 750	600 / 600
19. CLOM + TRIF + PROM	S-MET¹^/	AMGF + PYRI / AMGF²^/	600 + 1200 + 750	600 + 42 / 600

Tratamento			Fitointoxicação (Escala EWRC)
Pré-emergência	Over the top	Pós-emergência	11 DAS	25 DAS	31 DAS	60 DAS
1.	-	AMGF / AMGF²^/	1,00	1,00	1,00	1,00
2.	-	AMGF + PYRI / AMGF²^/	1,00	1,00	5,00	1,00
3.	-	AMGF / AMGF / AMGF³^/	1,00	1,00	1,00	1,00
4. CLOM + DIUR	-	AMGF / AMGF²^/	2,50	2,00	1,75	1,00
5. CLOM + DIUR	-	AMGF + PYRI / AMGF²^/	2,75	2,75	5,00	1,00
6. CLOM + PROM	-	AMGF / AMGF²^/	2,25	4,25	1,75	1,00
7. CLOM + PROM	-	AMGF + PYRI / AMGF²^/	2,00	3,50	5,00	1,00
8. CLOM + TRIF + DIUR	-	AMGF / AMGF²^/	2,50	2,25	2,00	1,00
9. CLOM + TRIF + DIUR	-	AMGF + PYRI / AMGF²^/	2,75	3,00	5,00	1,00
10. CLOM + TRIF + PROM	-	AMGF / AMGF²^/	2,00	4,25	2,75	1,00
11. CLOM + TRIF + PROM	-	AMGF + PYRI / AMGF²^/	1,75	4,25	5,00	1,00
12. CLOM + DIUR	S-MET¹^/	AMGF / AMGF²^/	2,50	2,00	1,25	1,00
13. CLOM + DIUR	S-MET¹^/	AMGF + PYRI / AMGF²^/	2,25	1,75	5,00	1,00
14. CLOM + TRIF + DIUR	S-MET¹^/	AMGF / AMGF²^/	3,00	4,00	2,00	1,00
15. CLOM + TRIF + DIUR	S-MET¹^/	AMGF + PYRI / AMGF²^/	3,00	3,25	5,00	1,00
16. CLOM + PROM	S-MET¹^/	AMGF / AMGF²^/	2,25	4,25	1,75	1,00
17. CLOM + PROM	S-MET¹^/	AMGF + PYRI / AMGF²^/	2,75	2,50	5,00	1,00
18. CLOM + TRIF + PROM	S-MET¹^/	AMGF / AMGF²^/	2,50	4,25	2,25	1,00
19. CLOM + TRIF + PROM	S-MET¹^/	AMGF + PYRI / AMGF²^/	2,50	4,25	5,00	1,00

Tratamento	Estande (plantas m^-1)				Altura de plantas (cm)
	11 DAS		125 DAS		25 DAS		125 DAS
	TRAT	TD	TRAT	TD	TRAT	TD	TRAT	TD
1	8,25	8,03	7,16	6,91	8,25 a	8,20 a	109,10 a	103,01 a
2	7,75	7,88	6,88	6,88	7,83 a	7,44 a	110,23 a	112,23 a
3	7,75	7,82	6,94	6,95	7,53 a	7,88 a	106,30 a	104,59 a
4	7,17	7,22	6,69	7,60	7,40 a	7,59 a	108,30 a	111,89 a
5	7,56	7,91	7,04	6,72	8,20 a	7,64 a	107,18 a	107,80 a
6	8,31	8,50	7,54	7,92	8,53 a	8,19 a	113,78 a	108,57 a
7	7,56	8,09	6,25	6,75	7,13 b	8,43 a	105,15 a	111,13 a
8	7,08	7,72	5,96	6,80	7,53 a	8,30 a	100,68 b	114,09 a
9	7,92	8,60	7,10	6,97	7,95 a	8,24 a	102,98 b	116,55 a
10	7,31	8,07	6,69	7,63	8,18 a	8,98 a	102,58 b	112,90 a
11	7,44	7,79	6,66	6,67	7,80 a	8,29 a	109,60 a	116,27 a
12	8,06	8,57	7,47	7,35	7,90 a	8,53 a	106,05 b	117,57 a
13	8,94	8,75	7,41	7,20	8,53 a	8,31 a	105,40 a	103,75 a
14	7,88	7,22	7,38	7,17	7,93 a	8,21 a	110,45 a	111,78 a
15	8,19	8,35	7,41	7,21	7,98 a	8,19 a	103,23 b	113,25 a
16	8,56	8,07	6,85	7,77	8,45 a	8,45 a	110,93 a	114,80 a
17	7,13	7,57	7,41	6,92	7,68 a	8,81 a	101,03 b	112,49 a
18	8,50	7,72	7,29	6,91	7,08 a	8,23 a	101,90 a	108,80 a
19	8,06	7,94	7,13	6,91	7,65 a	7,45 a	101,85 a	108,49 a
F	1,21^ns		0,94^ns		1,24*		0,62*
CV (%)	10,39		10,25		10,26		4,93

Tratamento	MAC (g)		MPC (g)		Produtividade (kg ha^-1)
Tratamento	TRAT	TD	TRAT	TD	TRAT	TD
1	6,45 a	6,38 a	2,73 a	2,69 a	5.294,44 a	5.036,26 a
2	6,10 b	6,49 a	2,52 b	2,73 a	5.123,36 a	5.288,70 a
3	6,27 a	6,39 a	2,66 a	2,67 a	5.389,19 a	5.355,47 a
4	6,34 a	6,34 a	2,67 a	2,68 a	5.480,26 a	5.231,50 a
5	6,32 a	6,40 a	2,64 a	2,67 a	5.126,07 a	5.304,69 a
6	6,43 a	6,38 a	2,71 a	2,66 a	5.492,60 a	5.228,21 a
7	6,37 a	6,43 a	2,66 a	2,69 a	5.101,98 a	5.289,20 a
8	6,36 a	6,24 a	2,71 a	2,64 a	4.747,44 b	5.525,08 a
9	6,28 a	6,26 a	2,63 a	2,61 a	5.063,09 b	5.635,18 a
10	6,37 a	6,41 a	2,68 a	2,71 a	4.897,20 b	5.499,18 a
11	6,21 a	6,45 a	2,57 a	2,69 a	4.730,20 b	5.478,33 a
12	6,33 a	6,39 a	2,68 a	2,65 a	5.068,26 a	5.200,80 a
13	6,42 a	6,29 a	2,67 a	2,66 a	5.228,39 a	5.298,19 a
14	6,29 a	6,19 a	2,58 a	2,59 a	5.363,49 a	5.400,17 a
15	6,35 a	6,44 a	2,68 a	2,67 a	5.220,39 a	5.464,50 a
16	6,27 a	6,30 a	2,61 a	2,63 a	5.357,73 a	5.700,66 a
17	6,24 a	6,48 a	2,61 a	2,71 a	4.887,34 b	5.438,74 a
18	6,18 a	6,45 a	2,60 a	2,66 a	4.842,08 b	5.657,89 a
19	6,34 a	6,50 a	2,68 a	2,72 a	4.919,72 b	5.471,22 a
F	0,45*		0,53*		0,45*
CV (%)	3,94		5,54		6,17

Tratamento	UI (%)		RES (gf tex^-1)		MIC (µg polegada^-1)
Tratamento	Trat	Test	Trat	Test	Trat	Test
1	82,60 a	83,49 a	27,23 a	28,16 a	3,96 a	3,77 a
2	83,28 a	83,43 a	27,48 a	28,28 a	3,87 a	3,94 a
3	84,08 a	83,80 a	27,35 a	28,35 a	3,84 a	3,88 a
4	83,33 a	82,98 a	28,30 a	28,43 a	3,72 a	3,83 a
5	82,83 b	84,03 a	28,50 a	28,89 a	3,65 a	3,76 a
6	83,80 a	84,10 a	28,32 a	28,12 a	3,81 a	3,82 a
7	83,25 a	83,63 a	29,15 a	28,48 a	3,88 a	3,80 a
8	83,05 a	83,66 a	26,95 a	27,73 a	3,83 a	3,81 a
9	82,28 b	83,64 a	28,50 a	28,81 a	3,79 a	3,64 a
10	83,55 a	83,48 a	27,35 b	29,19 a	3,90 a	3,74 a
11	83,11 a	83,43 a	28,23 a	28,68 a	3,69 a	3,76 a
12	83,98 a	83,69 a	28,45 a	27,41 a	3,79 a	3,75 a
13	84,18 a	83,56 a	27,38 a	28,18 a	3,85 a	3,80 a
14	82,17 a	82,91 a	29,27 a	27,91 a	3,80 a	3,83 a
15	83,33 a	82,99 a	29,33 a	28,40 a	3,69 a	3,80 a
16	83,05 a	82,99 a	26,93 b	28,64 a	3,86 a	3,74 a
17	83,28 a	82,95 a	27,48 b	29,14 a	4,00 a	3,90 a
18	83,43 a	82,74 a	28,78 a	28,40 a	3,64 b	3,89 a
19	82,73 a	83,08 a	27,27 a	27,98 a	3,66 b	3,95 a
F	1,43*		1,01*		0,79*
CV (%)	0,94		3,66		4,14

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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
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[TFN01] CLOM = clomazone; PROM = prometryn; DIUR = diuron; TRIF = trifluralin; S-MET = S-metolachlor; AMGF = amonio-glufosinate; PYRI = pyrithiobac-sodium. ^1/Dose utilizada nas aplicações em over the top equivalente a 768 g ha^-1 de S-metolachlor; ^2/ Aplicações sequenciais realizadas aos 25 e 40 DAS; ^3/ Três aplicações sequenciais realizadas aos 10, 25 e 40 DAS; Obs.: acrescentado Aureo^(r) a 0,2% v v^-1 aos tratamentos aplicados em pós-emergência. / = aplicação sequencial; + = mistura em tanque.