Response of Arabica Coffee Cultivars to Competition from Beggarticks

BORGES, L.G.M.; MIRANDA, F.R.; BORGES, A.M.; SILVA, J.R.O.; CAMPOS, A.A.V.; RONCHI, C.P.

doi:10.1590/S0100-83582019370100143

ABSTRACT:

The goal of this study was to analyze the response of Arabica coffee cultivars grown under three levels of Bidens pilosa (beggarticks) interference. At 30 days after transplanting (DAT) of 14 Arabica coffee cultivars into 11 L pots, beggarticks was seeded in the pots and soon after emergence, three levels of weed infestation were established: none, low (two plants per pot), and high (five plants per pot). Treatments were arranged in a 14 × 3 factorial scheme under a completely randomized design, with four replicates. Coffee plant growth was evaluated at both weed emergence and blossoming (90 DAT) when the experiment was completed. Regardless beggarticks infestation levels, significant effects of cultivars occurred on almost all the coffee growth variables. Specifically, the Arabica coffee cultivars Arara, Asa Branca, and Bourbon Amarelo exhibited greater values for root, leaf, shoot, and whole plant dry matter when compared with the other cultivars. The Arabica coffee cultivars presented lower leaf area increments, and also lower leaf, shoot, and whole plant dry matter accumulation when grown under either low or high infestation levels (between which there were no statistical differences, p>0.05) in comparison with that under the weed-free treatment. However, there were no significant interactions between Arabica coffee cultivars and weed infestation levels for those crop growth variables. We conclude that all Arabica coffee cultivars tested were equally susceptible to B. pilosa competition in this phase of crop implantation.

Keywords:
Bidens pilosa; Coffea arabica; weed competition; cultural control; growth; integrated weed management

[1] * Corresponding author: <claudiopagotto@ufv.br>

Granulometric analysis (%)
Coarse sand			Fine sand			Silt			Clay
24.20			13.92			8.36			53.52
Chemical analysis
pH	P	K	Al³⁺	Ca²⁺	Mg²⁺	H+Al	SB	t	T	V	m
	(mg dm^-3)		(cmol_c dm^-3)							(%)
5.8	0.6	49	0.03	0.95	0.28	1.74	1.35	1.38	3.09	43.79	2.18

Infestation level	Variable
Infestation level	HI (cm)	LAI (dm²)	SDI (mm)	LDM (g)	SDM (g)	SDM (g)
Null	0.11 a	8.67 a	2.12 a	11.84 a	20.55 a	16.01 a
Low	0.10 a	7.11 b	2.37 a	10.36 b	18.79 a	14.12 b
High	0.10 a	6.95 b	2.55 a	9.88 b	17.93 a	13.55 b
Average	0.10	7.58	2.35	10.69	19.09	14.56
-	RDM (g)	RDMRS	DMWP (g)	RLA (dm² kg^-1)	SLA (dm² kg^-1)	RSDTH (mm cm^-1)
Null	3.08 a	0.19 b	19.08 a	8.06 a	12.96 a	0.20 a
Low	3.03 a	0.21 a	17.10 b	8.33 a	13.61 a	0.21 a
High	2.87 a	0.21 a	16.42 b	8.72 a	14.27 a	0.20 a
Average	2.99	0.20	17.53	8.37	13.61	0.20

Average of the variable
-	Dry matter of the shoot	Dry matter of the root	Dry matter of the whole plant	Average height of the plants
Infestation level	Per pot (g)			60 DAT (cm)
Low	26.2 a	4.4 b	30.6 a	27.74 a
High	14.0 b	8.1 a	22.1 b	26.16 a
Overall average	20.1	6.2	26.3	26.95
-	Per plant (g)			90 DAT (cm)
Low	13.1 a	2.2 a	15.3 a	94.36 a
High	2.8 b	1.6 b	4.4 b	93.15 a
Overall average	7.9	1.9	9.9	93.75

Infestation level	Average height (cm)
Infestation level	60 DAT	90 DAT
Null	28.75 a	34.25 a
Low	27.51 a	33.04 a
High	28.04 a	33.79 a
Overall average	28.1	33.69

Cultivar	Variable
Cultivar	HI (cm)	LAI (dm²)	SDI (mm)	LDM (g)	SDM (g)	SDM (g)
Acauã	9.34 c	9.36 ab	1.66 cd	10.71 cdef	19.71 bcde	14.37 cdef
MGS Aranãs	11.89 bc	6.51 bcd	1.27 d	8.80 efgh	13.63 cdef	11.60 defg
Arara	9.17 c	9.48 ab	2.99 a	15.34 a	29.09 a	20.67 a
Asa Branca	11.13 bc	10.82 a	2.93 abc	14.32 ab	26.91 ab	19.70 ab
Bourbon Amarelo J9	15.92 a	8.47 abcd	2.95 ab	13.09 abc	26.84 ab	21.30 a
Catuaí Vermelho IAC 62	11.10 bc	7.09 bcd	2.67 abc	10.61 cdefg	18.03 cdef	14.13 cdef
Catuaí Amarelo IAC 99	9.79 bc	7.39 abcd	2.84 abc	12.29 bcd	21.46 abc	16.44 bc
Guará	12.25 b	7.08 bcd	2.43 abcd	10.26 defg	17.92 cdef	13.91 cdef
Tupi RN IAC 1699-13	9.60 bc	9.24 abc	2.40 abcd	11.18 cde	20.68 bcd	14.70 cde
IPR 103	10.97 bc	6.55 bcd	2.08 abcd	8.35 fgh	13.27def	10.88 fg
IPR100	10.53 bc	7.17 abcd	2.13 abcd	8.71 efgh	16.13 cdef	11.41 efg
Oeiras MG 6851	10.29 bc	5.59 cd	1.71 bcd	8.05 gh	12.38 ef	10.90 fg
Paraíso MG H 419-1	10.41 bc	6.16 bcd	3.04 a	11.13 cde	19.80 bcde	15.13 cd
Topázio MG 1190	10.65 bc	5.16 d	1.69 bcd	6.83 h	11.42 f	8.75 g
Overall average	10.93	7.58	2.34	10.69	19.09	14.56
Cultivar	Variable
Cultivar	RDM (g)	RDMRS	DMWP (g)	RLA (dm² kg^-1)	SLA (dm² kg^-1)	RSDTH (mm cm^-1)
Acauã	2.84 cd	0.20 ab	17.21 bcde	8.88 a	14.29 a	0.22 a
MGS Aranãs	2.41 cde	0.20 ab	14.01 cdef	8.33 ab	13.29 a	0.19 a
Arara	4.53 a	0.22 ab	25.20 a	7.82 ab	12.82 a	0.21 a
Asa Branca	4.34 a	0.22 ab	24.04 a	8.31 ab	13.95 a	0.19 a
Bourbon Amarelo J9	3.82 ab	0.18 b	25.12 a	6.78 b	13.01 a	0.13 b
Catuaí Vermelho IAC 62	3.06 bc	0.22 ab	17.20 bcde	8.08 ab	13.06 a	0.22 a
Catuaí Amarelo IAC 99	3.01 bc	0.19 ab	19.46 b	7.58 ab	12.02 a	0.20 a
Guará	2.84 cde	0.20 ab	16.75 bcde	8.07 ab	13.19 a	0.19 a
Tupi RN IAC 1699-13	2.85 cd	0.20 ab	17.55 bcd	9.09 a	14.30 a	0.23 a
IPR 103	2.35 cde	0.22 ab	13.24 ef	9.00 a	14.22 a	0.20 a
IPR100	2.36 cde	0.21 ab	13.77 def	9.19 a	14.52 a	0.22 a
Oeiras MG 6851	2.07 de	0.19 ab	12.97 ef	8.32 ab	13.38 a	0.20 a
Paraíso MG H 419-1	3.11 bc	0.21 ab	18.25 bc	7.38 ab	12.11 a	0.20 a
Topázio MG 1190	1.96 e	0.23 a	10.72 f	9.21 a	14.41 a	0.21 a
Overall average	2.97	0.21	17.53	8.29	13.47	0.20

Brasil

Brasil

Response of Arabica Coffee Cultivars to Competition from Beggarticks

Resposta de Cultivares de Café Arábica em Competição com Picão-Preto

ABSTRACT:

Cultivar	Infestation levels
Cultivar	Null	Low	High
Acauã	3.44 A abc	2.49 A cd	2.61 A bcde
MGS Aranãs	2.34 A c	2.27 A cd	2.63 A bcde
Arara	4.14 B ab	5.41 A a	4.04 B ab
Asa Branca	4.24 A a	4.75 A ab	4.02 A ab
Bourbon Amarelo J9	2.77 B abc	3.56 AB bc	4.55 AB a
Catuaí Vermelho IAC 62	3.40 A abc	3.32 A bcd	2.47 A cde
Catuaí Amarelo IAC 99	2.76 A abc	2.86 A cd	3.42 A abc
Guará	3.45 A abc	3.48 A cd	2.98 A bcde
Tupi RN IAC 1699-13	2.52 A c	2.88 A cd	3.17 A abcd
IPR 103	2.94 A abc	2.27 A cd	1.86 A de
IPR100	2.65 A bc	2.12 A cd	2.32 A cde
Oeiras MG 6851	2.54 A c	1.91 A d	1.76 A de
Paraíso MG H 419-1	3.38 A abc	3.16 A cd	2.80 A bcde
Topázio MG 1190	2.49 A c	1.89 A d	1.51 A e
Overall average	3.07	3.03	2.87