Fırat SEFAOĞLU, Erdoğan ÖZTÜRK, Hakan ÖZER, Taşkın POLAT

Effects of mepiquat chloride applications on non-oilseed sunflower

Non-oilseed sunflower plants can be exposed to lodging in some production regions due to higher plant height and largerheads, which is further exacerbated by heavily rainfall and strong winds. In this context, plant growth regulators such as mepiquatchloride (MC) can be considered as an alternative approach in reducing plant height and lodging. This study was conducted to determinethe effect of MC application on the growth, yield, and yield components of non-oilseed sunflowers at different growth stages (V4, R1, R2,and R3) and rates (0, 30, 60, and 90 g a.i. ha–1) in Erzurum Province, eastern Anatolia, Turkey, in the 2012 and 2013 growing seasons. Ingeneral, the MC applications had significant effects on the plant parameters investigated. In comparison with the control treatment, theMC application of 60 g a.i. ha–1 decreased plant height by 5.38% and increased stem diameter, head diameter, seed filling percentage, ratioof dehulled/hulled seed weight, 1000-achene weight, and seed yield by 14.01%, 3.78%, 1.61%, 4.20%, 5.94%, and 5.26%, respectively.Similarly, the applications of MC at different growth stages also significantly affected seed yield and other characteristics such as plantheight, stem diameter, and head diameter. The application of MC at the early growth stage (V4) was more effective compared to the latergrowth stages (R1, R2, and R3). The results of this study suggest that the mepiquat application rate of 60 g a.i. ha–1 in the early growthstage (V4) was more effective on the plant characteristics and that MC application could be effectively used as a means of reducing plantheight and the risk of lodging in non-oilseed sunflower production.

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Açar İ, Doran İ, Aslan N, Doğruer Kalkancı N (2016). Boron affects the yield and quality of nonirrigated pistachio (Pistacia vera L.) trees. Turk J Agric For 40: 664-670.
Anitha R, Sritharan N, Vanangamudi M, Jeyakumar P (2007). Effect of certain plant growth regulators on growth and yield of sunflower. Plant Arch 7: 309-312.
Arteca RN (1995). Plant Growth Substances: Principles and Applications. New York, NY, USA: Chapman and Hall.
Balodis O, Gaile Z (2009). Influence of agroecological factors on winter oilseed rape (Brassica napus L.) autumn growth. In: Annual 15th International Scientific Conference, 20–22 May 2009. Jelgava, Latvia: Latvia University of Agriculture, pp. 36- 43.
Barrabé A, Rapidel B, Sissoko F, Traoré B, Wery J (2007). Elaboration and test of a decision rule for the application of mepiquat chloride on cotton in Mali. Eur J Agron 27: 197-204.
Beltrano J, Caldiz DO, Barreyro R, Vallduvi GS, Bezus R (1994). Effects of foliar applied gibberellic acid and benzyladenine upon yield components in sunflower (Helianthus annuus L.). Plant Growth Regul 15: 101-106.
Biles SP, Cothren JT (2001). Flowering and yield response of cotton to application of mepiquat chloride and PGR-IV. Crop Sci 41: 1834-1837.
Botella Miralles O, De Juan Valero JA, De Santa Olalla M (1997). Growth, development and yield of five sunflower hybrids. Eur J Agron 6: 47-59.
Bozokalfa MK, Eşiyok D, Kaygısız Aşçioğul TK (2016). Diversity pattern among agromorphological traits of the Swiss chard (Beta vulgaris L. subsp. vulgaris) genetic resources of Turkey. Turk J Agric For 40:684-695.
Daniels RW, Scarisbrick DH, Chapman JF, Rawi ABN (1982). The influence of plant growth regulators on the growth, development and yield of oilseed rape (Brassica napus L.). In: McLaren JS, editor. Chemical Manipulation of Crop Growth and Development. London, UK: Butterworths, London, pp. 153-164.
De la Vega AJ, Hall AJ (2002). Effects of planting date, genotype and their interaction on sunflower yield, II. Components of oil yield. Crop Sci 42: 1202-1210.
Elkoca E, Kantar F (2006). Response of pea (Pisum sativum L.) to mepiquat chloride under varying application doses and stages. J Agron Crop Sci 192: 102-110.
Espindula MC, Rocha VS, Grossı JAS, Souza MA, Souza LT, Favarato LF (2009). Use of growth retardants in wheat. Planta Daninha 27: 2379-387.
Gausmann HW, Walter H, Rittig FR, Escobar DE, Rodriguez RR (1980). Effect of mepiquat chloride (Pix) on CO2 uptake of cotton plant leaves. In: Proceedings of the Plant Growth Regulator Working Group, pp. 1-6.
Gencsoylu I (2009). Effect of plant growth regulators on agronomic characteristics, lint quality, pests, and predators in cotton. J Growth Regul 28: 147-153.
İpek A, Turkmen Ö, Fidan S, İpek M, Karcı H (2016). Genetic variation within the purple carrot population grown in Ereğli District in Turkey. Turk J Agric For 40: 570-576.
Iqbal M, Iqbal MZ, Khan RSA, Hayat K, Chang MA (2004). Response of new cotton variety MNH-700 to mepiquat chloride under varying plant population. Pak J Biol Sci 7: 1898-1902.
Kim SK, Lee SC, Lee BH, Choi HJ, Kim KU, Lee IJ (2003). Bulbil formation and yield responses of Chinese yam to application of gibberellic acid, mepiquat chloride and trinexapac-ethyl. J Agron Crop Sci 189: 255-260.
Koutroubas SD, Vassiliou G, Fotiadis S, Alexoudis C (2004). Response of sunflower to plant growth regulators. In: Proceedings of the 4th International Crop Science Congress; 26 September–1 October 2004; Brisbane, Australia.
Koutroubas SD, Vassiliou G, Damalas CA (2014). Sunflower morphology and yield as affected by foliar applications of plant growth regulators. Int J Plant Product 8: 215-230.
Lamas FM, Athayde MLF, Banzatto DA (2000). Reactions of cotton CNPA-ITA 90 to mepiquat chloride. Pesqui Agropecu Bras 35: 507-516.
Lovett JV, Campbell DA (1973). Effects of CCC and moisture stress on sunflower. Exp Agric 9: 329-336.
Montemurro F, Donato DG, Francesco F, Emanuele S, Carolina V (2007). Influence of climatic conditions on yields, n uptake and effıcıency in sunflower. Italian J Agrometeor 2: 28-34.
Nasim W, Ashfaq A, Asghari B, Rabiu O, Muhammad U, Tasneem K, Aftab W, Hafiz MH, Muhammad M, Muzzammil H (2012). Effect of nitrogen on yield and oil quality of sunflower (Helianthus annuus L.) hybrids under sub humid conditions of Pakistan. Am J Plant Sci 3: 243-251.
Özer H, Öztürk E, Polat T (2003). Determination of the agronomic performances of some oilseed sunflower (Helianthus annuus L.) hybrids grown under Erzurum ecological conditions. Turk J Agric For 27: 199-205.
Ozturk E, Polat T, Sezek M (2017). The effect of sowing date and nitrogen fertilizer form on growth, yield and yield components in sunflower. Turk J Field Crops 22: 143-151.
SAS Institute (2001). The SAS System for Windows, v. 8.2. Cary, NC, USA: SAS Institute.
Sawan ZM, Hafez SA, Basyony AE (2001). Effect of nitrogen fertilization and foliar application of plant growth retardants and zinc on cottonseed, protein and oil yields and oil properties of cotton. J Agron Crop Sci 186: 183-191.
Schneiter AA, Miller JF (1981). Description of sunflower growth stages. Crop Sci 21: 901-903.
Spitzer T, Matušinský P, Klemová Z, Kazda J (2011). Management of sunflower stand height using growth regulators. Plant Soil Environ 57: 357-363.
Wanderley CD, Rezende R, Andrade CAB (2007). Effect of paclobutrazol as regulator of growth in production of flowers of sunflower in cultivo hidropônico. Cienc Agrotec 31: 1672- 1678 (in Portuguese with abstract in English).
Weiss EA (2000). Oilseed Crops. 2nd ed. London, UK: Blackwell Science Ltd.
Yasin AB, Singh S (2010). Correlation and path coefficient analyses in sunflower. J Plant Breed Crop Sci 2: 129-133.
York AC (1983). Cotton cultivar response to mepiquat chloride. Agron J 75: 663-667.