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The use of gibberellic acid to control flowering of sweet orange


, : The use of gibberellic acid to control flowering of sweet orange. Acta Horticulturae (34): 207-213

GA sprays reduced flowering of Late Valencia oranges by 44 to 75 %, and fruit-set by 16 to 41 %, depending on the concentration and time of application. The number of flowers per inflorescence was not greatly affected.

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Related references

Anonymous, 2012: Gibberellic Acid Reduces Flowering Intensity in Sweet Orange Citrus sinensis L Osbeck by Repressing CiFT Gene Expression. In <i>Citrus</i>, gibberellic acid (GA<sub>3</sub>) applied at the floral bud inductive period significantly reduces flowering intensity. This effect is being used to improve the fruit set of parthenocarpic cultivars that t...

Moss, G.I.; Bevington, K.B., 1977: The use of gibberellic acid to control alternate cropping of late valencia sweet orange. The effect of spraying commercial GA on alternate cropping and yield of 'Late Valencia' orange trees was studied in detail at 3 sites over 3 seasons. Two applications of GA were applied at a minimum concentration of 25 ppm (in 2 experime...

Agusti, M.; Garcia Mari, F.; Guardiola, J.L., 1982: Gibberellic acid and fruit set in sweet orange. A single GA3-spray (5-20 mg/l) at petal-fall to the entire tree enhanced initial set in the sweet orange cv. Navelate but this effect was transient and in most cases final yield was not increased. When spraying was followed by girdling, final yiel...

Guardiola, J.L.; Agusti, M.; Garcia Mari, F., 1978: Gibberellic acid and flower bud development in sweet orange. GA reduced flowering in Washington Navel and Navelate oranges, the degree of reduction depending on the time of application (November, December or January) and the concentration (25-200 p.p.m.). Although the greatest effect of GA was obtained when...

Curti Diaz, S.A.; Mosqueda Vazquez, R.; Rodriguez Pena, M.A., 1997: Effects of gibberellic acid, chloroethyl phosphonic acid and urea on flowering and yield of orange cv. Valencia. In an orchard of orange cv. Valencia planted in a clay loam soil in Veracruz, Mexico in 1985, GA3 was applied at a concentration of 25 mg/litre in mid- and late-December 1990 to reduce late winter flowering, and in March 1991 chloroethyl phosphoni...

Bianchi, V.J.; Fachinello, J.C.; Faria, J.L.C.; Silva, J.B. da, 2001: Gibberellic acid effects on flavedo color in Valencia sweet orange. The effect of gibberellic acid on the flavedo colour of sweet orange cv. Valencia was evaluated from 23 May to 23 November 1996 in Pelotas, Rio Grande do Sul, Brazil. Gibberellic acid was applied at concentrations of 0 (control), 40, 80 and 120 pp...

Facteau T.J.; Rowe K.E.; Chestnut N.E., 1989: Flowering in sweet cherry in response to application of gibberellic acid. Increasing dose of gibberellic acid (GA3, 0-150 mg l-1) reduced flowering of sweet cherry cultivars 'Bing' and 'Lambert' the year following treatment. Flowering was reduced to a greater extent on 1-year-old wood as compared to...

Ryugo, K.; Sansavini, S., 1972: Effect of succinic acid 2,2-dimethyl hydrazide on flowering and gibberellic acid contents of sweet cherry (Pruiuis avium L.). Applications of Alar to young sweet cherry trees for 2 successive seasons promoted flower bud formation. The starch content of the treated branches was higher than that of the control shoots, but the lignin contents were equal except in the termin...

Ryugo K.; Sansavini S., 1972: Effect of succinic acid 2 2 di methyl hydrazide on flowering and gibberellic acid contents of sweet cherry d prunus avium d. Journal of Horticultural Science 47(2): 173-178

Agusti, M.G.rcia-Mari, F1; Guardiola, J., 1982: Gibberellic acid and fruit set in sweet orange Citrus sinensis, foliar spray. Scientia horticulturae 17(3): 257-264