Fruit load restricts the flowering promotion effect of paclobutrazol in alternate bearing Citrus spp.

Martínez‐Fuentes, Amparo; Mesejo, Carlos; Muñoz-Fambuena, Natalia; Reig, Carmina; González‐Mas, M. Carmen; Iglesias, Domingo J.; Primo‐Millo, Eduardo; Agustí, Manuel

doi:10.1016/j.scienta.2012.12.014

Cited by 34 publications

(35 citation statements)

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“…This cultivar produces seeds, has a late maturation and a high tendency for alternate bearing, characterized by a year of bearing with high yield of small fruit and scarce flowering, followed by a year of insignificant fruit yield and abundant flowering (MARTÍNEZ-FUENTES et al, 2013). In order to obtain balanced harvests with fruit diameter and quality suitable for commercialization, hand-thinning is a common practice (RODRIGUES et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

3,5,6-trichloro-2-pyridinyloxyacetic acid as effective thinning agent for fruit of 'Montenegrina' mandarin

et al. 2016

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The 'Montenegrina' mandarin ( Citrus deliciosa Tenore) is widely cultivated in southern Brazil. This cultivar has a great tendency for alternate bearing, requiring thining of the fruit. However, the chemical thinners studied until now in this cultivar have not been successful. The objective of this research was to evaluate the effect of 3,5,6-trichloro-2-pyridinyloxyacetic acid (3,5,6-TPA) on the production and fruit quality of the 'Montenegrina' mandarin, in comparison with hand thinning and the options of chemical thinning previously studied. Hand thinning and no thinning were used as controls. Ethephon was applied in three doses: 200mg L-1, 300mg L-1 or 200mg L-1 + 3% urea; or 3,5,6-TPA, in four doses: 10, 20, 30 or 40mg L-1. Fruits of the hand thinned trees and those treated with 40mg L-1 showed greater average size, greater distribution of commercial caliber and more orange colors. No treatment reduced alternate bearing. Applications of 40mg L-1 of 3,5,6-TPA as a chemical thinner, during the physiological drop of young fruit, had a similar effect that of hand thinning over yield and quality of fruits of 'Montenegrina' mandarin.

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Section: Introductionmentioning

confidence: 99%

3,5,6-trichloro-2-pyridinyloxyacetic acid as effective thinning agent for fruit of 'Montenegrina' mandarin

et al. 2016

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“…La respuesta obtenida con PBZ coincide con numerosos estudios que avalan su efecto en adelantar y aumentar floración en muchos cultivares de mango incluyendo 'Ataulfo' (Singh y Bhattacherjee, 2005;Rebolledo et al, 2008;Arzani et al, 2009;Vázquez et al, 2009b;Pérez-Barraza et al, 2011;Martínez-Fuentes et al, 2013;Samani, 2014). Aunque hay pocos reportes en mango con relación al uso de P-Ca, nuestros resultados coinciden con los reportados por Abdel Rahim et al (2011) quienes encontraron en mango 'BaladiAbuZaid' y 'BaladiBurai' 40 días de adelantó en floración con P-Ca aplicado después de cosecha (18 de Julio); aunque, en variedades diferentes a 'Ataulfo'; no obstante, Do Carmo-Mouco et al (2011) no encontraron respuesta en floración en mango 'Kent'.…”

Section: Discussionunclassified

“…Para la maduración del flujo se ha dependido fuertemente del reguladores de crecimiento como placlobutrazol (Singh y Bhattacherjee, 2005;Rebolledo et al, 2008;Arzani et al, 2009;Vázquez et al, 2009b;Pérez-Barraza et al, 2011;Martínez-Fuentes et al, 2013;Samani, 2014), inhibidor de las enzimas de biosíntesis de giberelinas (GAs) en la etapa II (Dalziel and Lawrence, 1984;Hedden and Graebe, 1985;Redemarcher, 2000) y prohexadiona de calcio (P-Ca). P-Ca, tiene una estructura parecida al ácido 2-oxoglutárico, el sustrato de dioxigenasas, que catalizan las reacciones de la etapa III de la formación de Gas.…”

Section: Introductionunclassified

Prohexadiona de calcio reduce crecimiento vegetativo e incrementa brotación floral en mango ‘Ataulfo’

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et al. 2017

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La producción irregular en mango se atribuye a variación en la floración. Prohexadiona de calcio (P-Ca) reduce crecimiento vegetativo y favorece floración en frutales templados como manzano y subtropicales como aguacate. En mango ‘Ataulfo’, no hay información al respecto. El objetivo fue determinar dosis, época y número de aplicación de P-Ca en mango ‘Ataulfo’ con la finalidad de asegurar f loración y encontrar un sustituto para paclobutrazol (PBZ). El estudio se realizó de 2012 a 2014 en Tepic y San Blas Nayarit, en ambos años, los árboles fueron podados después de cosecha. Experimento 1 y 2: P-Ca (150, 250 y 500 mg L-1) a 0+10+20+30 días después de la poda (ddp) y 30+45+60 ddp, respectivamente. Experimento 3: P-Ca (500 mg L-1) una, dos o tres aplicaciones a 0, 0+10 y 0+10+20 ddp y Experimento 4: P-Ca (150 y 500 mg L-1) a 30+45+60 ddp y 1 500 mg L-1 en una sola aplicación (1 x) 30 ddp. En todos los experimentos se incluyó un tratamiento estándar de PBZ (2 500 mg L-1) 30 ddp y un testigo (agua más surfactante). El diseño fue completamente al azar, 6 repeticiones, un árbol como unidad experimental. En Experimento 2, se logró reducir un 35% el crecimiento vegetativo con P-Ca 500 mg L-1 (3 x) entre 30-60 ddp. Esta misma dosis de P-Ca (500 mg L-1) (3 x) a 30, 45 y 60 ddp, o una sola aplicación (1 500 mg L-1) 30 ddp logró igual el efecto de PBZ en adelanto (20-35 días) y porcentaje de floración. En los dos ciclos, ambos productos mejoraron amarre y producción de fruto. Con base a los resultados obtenidos se considera que P-Ca pudiera ser un sustituto para PBZ en mango ‘Ataulfo’ para asegurar floración y producciones regulares año con año.

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“…[1][2][3][4] Most chiral pesticides are sold as the racemic mixture for some limitations, 5 and only 7% chiral pesticides are marketed as the pure isomer or as an enriched mixture of the active isomer, 6 such as S-metolachlor. [14][15][16][17] Some studies have demonstrated that racemic form and two enantiomers of paclobutrazol have different activity in fungicidal and plant growth. The study on the chiral pesticide is so important that recently there are many researches about the stereoselective behavior.…”

Section: Introductionmentioning

confidence: 99%

The different dissipation behavior of chiral pesticide paclobutrazol in the brine during Chinese cabbage pickling process

et al. 2019

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Paclobutrazol (PBZ) is a kind of chiral pesticide, which is a plant growth regulator and has fungicidal activity. Because of the steric-hindrance effect, there are two enantiomers (2S, 3S; 2R, 3R) in the production. This research studied on the dissipation behavior of chiral pesticide PBZ in the brine during the Chinese cabbage pickled process by phase column-high performance liquid chromatography (HPLC). The result demonstrated the PBZ enantiomers had the different dissipation in the brine. The study on the behavior of chiral pesticide PBZ in food may provide more sufficient data and information for understanding the potential risk in food and evaluating the environmental pollution at the enantiomer level.

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Fruit load restricts the flowering promotion effect of paclobutrazol in alternate bearing Citrus spp.

Cited by 34 publications

References 32 publications

3,5,6-trichloro-2-pyridinyloxyacetic acid as effective thinning agent for fruit of 'Montenegrina' mandarin

3,5,6-trichloro-2-pyridinyloxyacetic acid as effective thinning agent for fruit of 'Montenegrina' mandarin

Prohexadiona de calcio reduce crecimiento vegetativo e incrementa brotación floral en mango ‘Ataulfo’

The different dissipation behavior of chiral pesticide paclobutrazol in the brine during Chinese cabbage pickling process

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