An Update on Preharvest Drop Control of Apples With Aminoethoxyvinylglycine (Retain)

Greene, Duane W.

doi:10.17660/actahortic.2006.727.37

Cited by 39 publications

(56 citation statements)

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“…Since the treated and untreated fruits were harvested on the same day, these results oppose the claims of Greene (2006) that the larger fruits are consequences of delayed harvest times, rather than the direct impact of AVG.…”

Section: Resultscontrasting

confidence: 58%

“…Treating apple trees with AVG prior to harvest reduces preharvest fruit drop (Greene 2006;Fallahi 2007), slows down starch degradation in the fruits (Layne et al 2002;Drake et al 2006), infl uences fruit size (Lawes, Woolley 2001;Fallahi 2007), alters the development of ground and over skin colour (Layne et al 2002), and increases fruit fi rmness at harvest time and during storage (Amarante et al 2010). Th e fruits treated with AVG have a lower content of soluble solids than the untreated fruits at harvest time (Drake et al 2005;Fallahi 2007).…”

mentioning

confidence: 99%

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Aminoethoxyvinylglycine (AVG) affects cv. Royal Gala apple fruit quality at harvest and after storage - Short communication

Magazin

Keserović

Milić

et al. 2012

Hort. Sci. (Prague)

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Magazin N., Keserovi Z., Mili B., Dori M., 2012. Aminoethoxyvinylglycine (AVG) aff ects cv. Royal Gala apple fruit quality at harvest and after storage -Short communication. Hort. Sci. (Prague), Aminoethoxyvinylglycine (AVG), an inhibitor of ethylene synthesis was applied at a concentration of 125 g/l of active ingredient on Royal Gala apple trees 4 weeks before the anticipated harvest in two consecutive years. Immediately after harvest fruits were stored at 1°C and 90% of relative humidity for up to 90 days. Quality assessments of total soluble solids (TSS), titratable acidity (TA) and fi rmness were done on 30-days intervals after harvest. Treating Royal Gala apples with AVG signifi cantly slowed down starch degradation in fruits but in the same time increased fruit weight. Also, the development of over colour was negatively aff ected. A positive infl uence on fruits' fi rmness was also evident, while there was no infl uence of AVG on TSS and TA.

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Section: Resultscontrasting

confidence: 58%

mentioning

confidence: 99%

Aminoethoxyvinylglycine (AVG) affects cv. Royal Gala apple fruit quality at harvest and after storage - Short communication

Magazin

Keserović

Milić

et al. 2012

Hort. Sci. (Prague)

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“…The sizes and mass of fruit were affected by dependent of plant growth regulator doses (LAWES; WOOLLEY, 2001;SCHUPP, 2004;GREENE, 2006). Amarante et al (2002) reported that as AVG treated, there were increases in flesh firmness, skin firmness, and fruit size value.…”

Section: Discussionmentioning

confidence: 99%

Effect of aminoethoxyvinylglycine on biochemical, physicomechanical and colour properties of cv. Braeburn apples

et al. 2013

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The effect of preharvest AVG (aminoethoxyvinylglycine) treatments on the biochemical, physicomechanical properties and colour characteristics of cv. Braeburn apples were determined. AVG was applied in four different doses (0, 100, 300 and 500 mgL -1 AVG) 4 weeks before the estimated harvest date. While the lowest values of total soluble solids content and pH were obtained from 500 mgL -1 AVG treatment, the highest values were obtained from control. The titratable acidity was higher in 500 mgL -1 AVG treatment than those of the 100 and 300 mgL -1 AVG treatments. The highest total phenolic and antioxidant activity of both flesh and skin apple was obtained from control, whereas lowest value was obtained from 500 mgL -1 AVG treatment. With increasing doses of AVG, the total monomeric anthocyanin was reduced. The geometric means, fruit diameter, fruit mass, fruit removal force, flesh and skin firmnesses increased with increasing doses of AVG. The hue angle values of flesh and skin fruit were lower in control. Key words: Malus domestica Borkh, colour, FRAP, phenolic compounds ResumoForam determinados os efeitos do tratamento em pré-colheita com aminoetoxivinilglicina (AVG) nas propriedades bioquímicas, físico-mecânicas e características da cor da maçã 'Braeburn'. AVG foi aplicado quatro semanas antes da data estimada de colheita, em quatro doses (0, 100, 300 e 500 mgL -1 ). Enquanto os menores valores de sólidos solúveis totais e pH foram obtidos no tratamento com 500 mgL -1 AVG, os maiores valores foram obtidos no tratamento com 0 mgL -1 AVG. A acidez titulável foi maior no tratamento com 500 mgL -1 AVG do que nos tratamentos 100 e 300 mgL -1 . A maior atividade de fenólicos totais e antioxidantes na polpa e na casca da maçã foi obtida no tratamento com 0 mgL -1 AVG, enquanto que o menor valor foi obtido no tratamento com 500 mgL -1 AVG. Com o aumento das doses de AVG, a antocianina monomérica total foi reduzida. As médias geométricas diâmetro do fruto, massa do fruto, força de remoção de frutas, polpa e casca aumentaram com o aumento das doses de AVG. Os valores do ângulo da matriz de polpa e casca da fruta foram menores no tratamento com 0 mgL -1 AVG.

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“…Inhibition of ethylene biosynthesis may retard fruit ripening and prevent pre-harvest drops. AVG treatments 1-4 weeks before the harvest inhibited ethylene synthesis in apples, nectarines, peaches, pears and plums (JOBLING et al, 2003;GREENE, 2006;LURIE, 2008). A natural ethylene inhibitor AVG was reported to be effective in prevention or reduction of pre-harvest drops in apples (GREENE;GREENE, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…AVG treatments 1-4 weeks before the harvest inhibited ethylene synthesis in apples, nectarines, peaches, pears and plums (JOBLING et al, 2003;GREENE, 2006;LURIE, 2008). A natural ethylene inhibitor AVG was reported to be effective in prevention or reduction of pre-harvest drops in apples (GREENE;GREENE, 2005). Beside reduction in drop rates, AVG also slows down the fruit ripening process and provide supports in flesh firmness preservation during the harvest and post-harvest storage of fruits (GREENE; OZTURK et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

AVG application regimes play an important role on pre-harvest drop and ripening of ‘Jonagold’ apples

2015

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This study was carried out to investigate the effects of different AVG (aminoethoxyvinylglycine) treatments on pre-harvest fruit drop rates and ripening levels of 'Jonagold' apples. A total of 225 mg L -1 AVG dose was applied at once in a single application at different times or divided into doses and applied different times. Compared to control treatment, entire AVG treatments increased fruit removal force and significantly decreased the pre-harvest drop rates. AVG treatments applied at once (225 mg L -1 ) 8 or 4 weeks before the anticipated harvest time were found to be more effective than the divided treatments. AVG treatments inhibited ethylene biosynthesis and such an inhibition was more distinctive in single 225 mg L -1 treatments. AVG treatments decreased flesh softening, starch degradation rates and consequently retarded fruit ripening. The 225 mg L -1 AVG treatment applied 4 weeks before the harvest significantly increased L* value and hue angle both in the year 2010 and 2011. NAA (naphtaleneacetic acid) at 10 mg L -1 sprayed 4 and 2 weeks before anticipated harvest was found to be insignificant in control of pre-harvest fruit drops. NAA treatment decreased flesh firmness, and did not have any significant effects on ethylene biosynthesis. Key words: Colour, ethylene, firmness, fruit removal force, starch degradation ResumoO presente estudo foi realizado para investigar os efeitos de diferentes tratamentos AVG (aminoetoxivinilglicina) sobre as taxas de queda de frutos antes da colheita e níveis de amadurecimento de maçãs 'Jonagold'. Foi aplicada uma dose AVG total de 225 mg L -1 numa só vez numa única aplicação em momentos diferentes ou dividida em doses aplicadas e tempos diferentes. Em comparação ao tratamento controle, as aplicações de AVG aumentaram a força de remoção dos frutos e reduziram significativamente as taxas de queda na pré-colheita. A aplicação de AVG de uma só vez (225 mg L -1 ) ou 4 a 8 semanas antes da época da colheita mostrou-se mais eficaz do que as aplicações efetuadas em doses. O tratamento com AVG inibe a biossíntese de etileno, sendo que esta inibição se verificou mais significativa em tratamentos individuais de 225 mg L -1 . O tratamento com AVG diminuiu o amolecimento da polpa, as taxas de degradação do amido e consequentemente retardou o amadurecimento dos frutos. O tratamento com doses de 225 mg L -1 de AVG aplicadas quatro semanas antes da colheita aumentou significativamente o valor L * e o ângulo de cor, tanto no ano de 2010 como de 2011. A pulverização de NAA (ácido naftaleno acético) a 10 mg L -1 2 a 4 semanas antes da colheita foi considerada insignificante no controle da queda de frutos na pré-colheita. O tratamento com NAA diminuiu a firmeza da polpa, e não tem quaisquer efeitos significativos sobre a síntese de etileno. Palavras-chave: Cor, etileno, firmeza, força de remoção dos frutos, degradação do amido 1 Assist. Prof. Dr.,

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An Update on Preharvest Drop Control of Apples With Aminoethoxyvinylglycine (Retain)

Cited by 39 publications

References 0 publications

Aminoethoxyvinylglycine (AVG) affects cv. Royal Gala apple fruit quality at harvest and after storage - Short communication

Aminoethoxyvinylglycine (AVG) affects cv. Royal Gala apple fruit quality at harvest and after storage - Short communication

Effect of aminoethoxyvinylglycine on biochemical, physicomechanical and colour properties of cv. Braeburn apples

AVG application regimes play an important role on pre-harvest drop and ripening of ‘Jonagold’ apples

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