Paclobutrazol application in potted ornamental pepper

Ribeiro, Wellington S; Carneiro, Clebson dos S; França, Christiane de Fátima M; Pinto, Cleide Maria F; Lima, Paula Cristina C; Finger, Fernando L; Costa, Franciscleudo B da

doi:10.1590/S0102-053620190416

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Scientific Communication • Hortic. Bras. 37 (4) • Oct-Dec 2019 • https://doi.org/10.1590/S0102-053620190416 copy

Paclobutrazol application in potted ornamental pepper

Aplicação de paclobutrazol em pimenteiras ornamentais cultivadas em vaso

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Within the genetic variability of the Capsicum genus there are plants with ornamental potential, but awry height required by the market. Paclobutrazol (PBZ), gibberellin retardant and growth inhibitor, is normally used as alternative to reduce plant height. The objective was to evaluate the PBZ (0, 25, 50 and 75 mg L^-1) effect on plant height of eight pepper genotypes. Seven accessions [BGH 1032, BGH 1039, BGH 7073 (C. annuum), BGH 4285, BGH 4199, BGH 4355 and BGH 6371 (C. chinense)] of the germplasm bank from Universidade Federal de Viçosa and one access [MG 302 (C. annuum)] from the germplasm bank of the Empresa de Pesquisa Agropecuária de Minas Gerais were evaluated. The PBZ application was ineffective in altering plant architecture of BGH 6371. PBZ at 25 mg L^-1 resulted in plants with better ornamental characteristics of the accesses BGH 1032 and BGH 1039. Considering the cost-benefit, the indicated dose for BGH 4285, BGH 7073 and MG 302 access is 25 mg L^-1 PBZ. The PBZ application in BGH 4199 and BGH 4355 accesses, despite reducing plant height, did not improve the ornamental characteristics, resulting in plants without canopy pattern.

Keywords:
Capsicum annuum; Capsicum chinense; market; ornamental plants

Access	PC (mg L^-1)	PH (cm)	FBH (cm)	LD/TD	LL (cm)	SW (cm)	NL	NFr
BGH 1032	0	38.67	21.34	0.92	12.27	3.69	142.34	39.34
	25	23.10^*	8.34^*	0.86^ns	9.40^*	3.05^ns	139.67^ns	22.00^*
	50	11.67^*	4.50^*	0.82^ns	6.30^*	2.42^*	63.67^*	15.67^*
	75	10.50^*	4.50^*	0.87^ns	5.50^*	2.15^*	42.34^*	10.34^*
BGH 1039	0	46.00	25.67	0.86	4.04	2.89	183.67	45.00
	25	12.67^*	4.83^*	0.85^ns	5.07^*	2.18^ns	116.67^*	21.33^*
	50	9.33^*	3.17^*	0.94^ns	4.96^*	2.08^ns	72.67^*	12.33^*
	75	7.00^*	2.00^*	0.95^ns	4.99^*	2.13^ns	52.67^*	9.33^*
BGH 7073	0	41.67	10.67	0.97	8.21	2.84	279.67	71.33
	25	14.67^*	3.67^*	0.98^ns	5.40^ns	2.71^ns	175.00^*	26.33^*
	50	13.33^*	3.17^*	0.92^ns	4.97^ns	2.87^ns	107.67^*	18.33^*
	75	13.50^*	2.50^*	0.91^ns	4.84^ns	2.88^ns	102.67^*	10.00^*
MG 302	0	51.00	18.67	0.89	7.78	2.14	326.67	118.33
	25	12.33^*	4.67^*	0.81^ns	4.14^*	1.16^*	224.00^ns	57.67^*
	50	10.50^*	4.33^*	0.91^ns	3.90^*	1.12^*	215.67^ns	36.33^*
	75	7.00^*	2.83^*	0.89^ns	3.01^*	0.89^*	169.67^*	19.33^*
BGH 4285	0	83.57	33.12	0.76	17.12	6.92	143.00	31.50
	25	43.12^*	14.50^*	0.83^ns	15.77^ns	5.45^ns	165.75^ns	61.75^*
	50	45.62^*	13.75^*	0.75^ns	14.00^ns	5.12^*	124.25^ns	24.00^*
	75	51.12^*	11.00^*	0.84^ns	13.75^ns	4.95^*	127.50^ns	34.00^*
BGH 4199	0	89.50	38.75	0.64	14.00	6.37	163.00	27.50
	25	48.00^*	11.40^*	0.82^ns	11.00^ns	5.00^ns	132.00^ns	40.00^*
	50	53.00^*	12.00^*	0.86^ns	12.50^ns	5.50^ns	121.50^ns	53.50^*
	75	72.75^*	16.25^*	0.59^ns	12.62^ns	5.05^ns	111.75^ns	58.00^*
BGH 4355	0	108.50	36.00	0.76	14.87	7.82	166.25	15.50
	25	81.25^*	20.00^*	0.49^ns	13.02^ns	7.00^ns	148.00^ns	4.75^*
	50	96.00^ns	15.50^*	0.69^ns	14.30^ns	7.24^ns	140.25^ns	6.00^*
	75	77.00^*	13.75^*	0.65^ns	11.67^ns	4.87^*	136.00^ns	13.25^ns
BGH 6371	0	82.00	39.50	0.77	17.82	8.12	125.50	30.25
	25	61.25^ns	28.25^*	0.61^ns	16.40^ns	8.50^ns	75.50^*	28.25^ns
	50	66.75^ns	26.00^*	0.62^ns	16.60^ns	7.50^ns	77.75^*	30.75^ns
	75	59.25^ns	18.02^*	0.63^ns	18.00^ns	7.62^ns	52.75^*	18.75^ns

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[TFN1] Means followed by (*) differ from control by Dunnett’s test at 1% probability. Means followed by (ns) do not differ from control by the Dunnett Test at 1% probability.