Commercial Chemical Thinning of Stone Fruit in California by Gibberellins to Reduce Flowering

Southwick, Stephen M.; Jr, Ribeiro

doi:10.17660/actahortic.1995.394.13

Cited by 17 publications

(19 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results represent the best possible response because thinning activity is reduced without reducing yield or fruit size. The increase in yield following GA treatment over hand thinning is similar to responses measured previous17 in apricot (Southwick and Fritts, 1995;.…”

Section: Discussionsupporting

confidence: 86%

“…Attempts to reduce flowering to facilitate hand thinning have been made previously with peach (Brown et al, 1968;Corgan and Widmoyer, 1971;Edgerton, 1966;Stembridge and Larue, 1969), sometimes resulting in delayed fruit maturation (Brown et al, 1968). Gibberellin (GA) sprays applied from late May through July to 'Patterson' apricot reduced the following season's flowering and increased fruit size compared to handthinned and nonthinned trees and eliminated the need for hand thinning in some seasons (Southwick and Fritts, 1995;Southwick and Yeager, 1991).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Controlling Cropping in `Loadel' Cling Peach Using Gibberellin: Effects on Flower Density, Fruit Distribution, Fruit Firmness, Fruit Thinning, and Yield

Southwick¹,

Weis²,

Yeager³

et al. 1995

jashs

View full text Add to dashboard Cite

Whole-tree sprays of Release LC [predominantly gibberellic acid] (GA,) were applied in a commercial peach [Prunus perisca (L.) Batsch.] orchard in the California Central Valley on three dates from mid-June (about 90 days after full bloom = 28 days before harvest) to late July (14 days postharvest) 1993 at 50, 75, 100, and 120 mg·liter-1. Gibberellin (GA) reduced the number of flowers differentiated in 1993, thereby reducing fruit density in 1994, when sprays were applied by early July 1993. Sprays in late July did not reduce flowering and fruiting density in the following year. In 1994, there were fewer fruit located on the proximal third of the shoot after GA sprays of 75,100, and 120 mg-liter' applied on 15 June compared to hand-thinned controls, and reduction was linear with increase in GA rate. Fruit numbers in the middle and distal sections of shoots were reduced by all 15 June and some 9 July GA sprays, with fewer fruit as concentration increased. However, the distribution of fruit within shoot sections, after GA treatments during floral differentiation, expressed as a percentage of the total number of fruit along fruiting shoots, showed even fruiting compared with hand thinning. Due to reduced flowering in response to GA treatments in June and early July 1993, the hand-thinning requirement was significantly reduced, with no thinning required in 1994 from 15 June 1993 GA sprays. All sprays applied in early July resulted in 40% to 60% fewer fruit removed during thinning than the nontreated controls. Sprays in late July were ineffective. Sprays of GA applied in mid-June at 50,75, 100, and 120 mg·liter and sprays of 120 mg·liter-1 GA applied in early July (4 days preharvest) increased the firmness of `Loadel' cling peach (about 26% improvement in June sprays) in 1993. The salable yield of fruit (after removal of the undersized fruit) was the same on hand thinned and on non-hand thinned trees treated with GA on 15 June at 50 mg·liter-1. The salable yield of fruit was increased by GA sprays of 50 and 75 mg·liter applied on 9 July 1993 compared to controls. There were no differences in fruit size (by weight or diameter) among the aforementioned treatments and hand thinning. GA sprays of 75,100, and 120 mg-liter' applied on 15 June 1993 tended to reduce salable yield, but fruit size increased with decreased yield. Based on the results obtained in 1993 and 1994, we believe that Release LC has good potential for chemically thinning peaches in California.

show abstract

Section: Discussionsupporting

confidence: 86%

mentioning

confidence: 99%

Controlling Cropping in `Loadel' Cling Peach Using Gibberellin: Effects on Flower Density, Fruit Distribution, Fruit Firmness, Fruit Thinning, and Yield

Southwick¹,

Weis²,

Yeager³

et al. 1995

jashs

View full text Add to dashboard Cite

show abstract

“…Fruit maturity (and therefore color) was not affected by GA 3 treatment at 50-100 mg/L in apricots (Southwick et al, 1997). Visual (qualitative) measurements of color have indicated similar responses for untreated and GA 3 -treated stone fruits in other studies (Southwick et al, 1997;Southwick and Fritts, 1995).…”

Section: Applicationsmentioning

confidence: 55%

Effects of gibberellic acid treatments on fruit thinning and fruit quality in Japanese plum (Prunus salicina Lindl.)

Eroğul

Şen

2015

Scientia Horticulturae

View full text Add to dashboard Cite

“…Since there is an inverse relationship between vigour and the number of floral buds produced , it is thought that GA 3 affects more acutely to the more vigorous shoots than the less vigorous, such as spurs. These results agree with those found by Southwick and Fritts (1995) for different Japanese plum cultivars, such as 'Black Amber' and 'Friar', but these authors did not study differential sensitivity of shoots or the effect of GA 3 on yield and fruit quality.…”

Section: Discussionsupporting

confidence: 88%

“…Exogenous applications of gibberellic acid (GA 3 ) during flower bud induction result in a reduction of flowering in the following season in Citrus, Prunus and Pome species Tromp, 1982;Southwick and Fritts, 1995).…”

Section: Introductionmentioning

confidence: 99%

Control de la floración en el género prunus. Factores climáticos y nutricionales

ROSSIA¹

View full text Add to dashboard Cite

AGRADECIMIENTOSConstantemente el destino va intercalando pruebas en el camino de nuestras vidas que cada uno resuelve de manera única y personal. El haber venido a España a realizar esta tesis doctoral fue para mí una de esas pruebas, que he podido sortear favorablemente gracias al apoyo de muchas personas. Por ello, quiero expresar mi más sincero agradecimiento a todos aquellos que han estado a mi lado durante todo este tiempo brindándome su cariño y a los que, directa o indirectamente, me han acompañado en la ardua, paciente y generosa labor de investigar, en especial:A los técnicos de las Cooperativa de Alginet, Carlet y de la Estación Experimental de Carlet (Consellería de Agricultura, Pesca y Alimentación de Valencia), por su inestimable colaboración.A los compañeros, que en una larga sucesión itinerante, han pasado por el Laboratorio de Citricultura de la UPV, por tantos buenos momentos vividos juntos.A los amigos, argentinos, uruguayos, chilenos, holandeses y españoles por brindarme su cariño, consejo y tolerancia, en los buenos y en los malos momentos.A Norberto Gariglio y Rubén Pilatti, por su permanente apoyo, consejo y guía desde mis primeros pasos en investigación en la Facultad de Agronomía de Esperanza (UNL -Argentina) hasta la fecha.A Manolo Agustí, mi director, por confiar en mí y darme la posibilidad, los medios y el apoyo necesario para desarrollar este trabajo, y lo que es más importante, por ofrecerme su amistad.A Rai e Isabel, por estar siempre allí cuando los necesité y por su cariño.A Vicente Clavijo, por ser como un segundo padre para mí aquí en España.A Pedro, mi hermano, por haberme escuchado y aconsejado siempre y por ser además, mi mejor amigo.A mi papá, por guiarme en el aprendizaje de la ciencia y la investigación, y por ser mi referente como hombre y como profesional.A mi mamá, por su amor de madre y por haber dado siempre todo, en pos de la felicidad y bienestar de sus hijos.Y finalmente a Laura, por su amor, paciencia, dulzura, confianza…. en definitiva, por 'TODO'.A todos, muchísimas gracias Tables index iii T Ta ab bl le es s i in nd de ex x Page Table 3.1: Influence of fruit on the terminal shoots (mixed and fruiting shoots) characteristics from mixed branches of nectarine 'Zincal 5' trees completely thinned in bloom (NF) by hand, thinned to 40% of fruits by hand at pit hardening (TF) and not thinned (AF). Values corresponding to dormancy stage. Each value is the mean ± SE of 100 branches from 10 trees. Table 3.2: Nitrate-nitrogen and ammonia-nitrogen content in 'Zincal 5' nectarine phloem sap on fully thinned in bloom by hand (NF), thinned to 40% fruit by hand at pit hardening (TF) and not thinned (AF) trees. Values corresponding to dormancy stage. Each value is the mean ± SE of 10 trees. Table 4.1: Effect of gibberellic acid (GA 3 ) applied during the period of flower bud induction on flowering density, time spend on hand-thinning, average fruit diameter, total number of fruit at harvest, percent of fruit harvested at first picking date and yield per tree in peach...

show abstract

Commercial Chemical Thinning of Stone Fruit in California by Gibberellins to Reduce Flowering

Cited by 17 publications

References 0 publications

Controlling Cropping in `Loadel' Cling Peach Using Gibberellin: Effects on Flower Density, Fruit Distribution, Fruit Firmness, Fruit Thinning, and Yield

Controlling Cropping in `Loadel' Cling Peach Using Gibberellin: Effects on Flower Density, Fruit Distribution, Fruit Firmness, Fruit Thinning, and Yield

Effects of gibberellic acid treatments on fruit thinning and fruit quality in Japanese plum (Prunus salicina Lindl.)

Control de la floración en el género prunus. Factores climáticos y nutricionales

Contact Info

Product

Resources

About