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Effects of gibberellic acid on fruit set of Passe Crassane pear






Acta Horticulturae (80): 143-147

Effects of gibberellic acid on fruit set of Passe Crassane pear

In 5 years' trials, GA3 sprays significantly increased fruit set in Passe Crassane pears following spring frost damage, under conditions when natural parthenocarpy was low.


Accession: 000647450



Related references

Flick, J.; Hermann, L., 1981: Effects of gibberellic acid on the pear variety Passe Crassane. II. Incidences on fruit set after frost damage at full bloom Pyrus communis.1. Agronomie: sciences des productions vegetales et de l'environnement(5): 405-407

Flick, J.D.; Hermann, L., 1984: Effects of gibberellic acid on pear production (cv. Passe Crassane). Cv. Passe Crassane is particularly susceptible to frost damage because it is early flowering. In trials from 1973 to 1977 with trees on Provence Quince rootstocks planted in 1959, GA3 enhanced parthenocarpy when applied up to petal fall. As regard...

Flick, J.D.; Hermann, L., 1981: The effects of gibberellic acid on the pear cultivar Passe Crassane. II. Results with regard to fruiting under conditions of frost at full bloom. Young, attached, fruits of the pear cv. Passe Crassane were artificially wounded to simulate frost damage (2 fruits per cluster being pierced with a needle to damage the gynoecium) and 15 p.p.m. GA3 was then applied to the wounds. Fruit retention...

Flick, J.D.; Hermann, L., 1981: The effects of gibberellic acid on the pear cultivar Passe Crassane. I. The influence of five consecutive annual applications at full bloom in the absence of frost. In 5 successive years, trees of the pear cv. Passe Crassane in full bloom were subjected to the following treatments: (1) hand pollination, (2) hand pollination + GA3, (3) partial hand pollination, (4) no pollination, or (5) no pollination + GA3....

Flick, J.; Hermann, L., 1981: Effects of gibberellic acid on the pear variety Passe Crassane. I. Study of the effects of five consecutive annual sprays at full bloom without frost damage Pyrus communis.1. Agronomie: sciences des productions vegetales et de l'environnement(5): 399-404

Laffray D.; Dupin J.F.; Paulet P., 1976: Variation in the abscisic acid content of 2 cultivars of pear passe crassane and doyenne du comice related to induction of parthenocarpy by gibberellic acid. Physiologia Plantarum 36(1): 60-65

Laffray, D.; Dupin, J.F.; Paulet, P., 1976: Variations in the content of abscisic acid in two pear cultivars, Passe-Crassane and Doyenne du Comice, as a function of the induction of parthenocarpy by gibberellic acid. Young fruit were harvested at intervals from trees treated with GA3 at full bloom to induce parthenocarpy, or from untreated trees. In Passe Crassane changes in ABA level were little affected by GA3 but in Comice the ABA level was about twice as h...

Nanos, G.D.; Romani, R.J.; Kader, A.A., 1992: Metabolic and other responses of 'Bartlett' pear fruit and suspension-cultured 'Passe Crassane' pear fruit cells held in 0.25% O2. 'Bartlett, pears (Pyrus communis L.) that had been stored for either 2 or 8 weeks in air at 0C were placed under an atmosphere of 0.25% O2 (balance N2) at 20C for 4 days then returned to air. Control pears were kept in air at 20C. Suspension-...

Nanos, G., D.; Romani, R., J.; Kader, A., A., 1992: Metabolic and other responses of Bartlett pear fruit and suspension-cultured Passe Crassane pear fruit cells held in 0.25 percent oxygen. 'Bartlett' pears (Pyrus communis L.) that had been stored for either 2 or 8 weeks in air at 0C were placed under an atmosphere of 0.25% O-2 (balance N-2) at 20C for 4 days then returned to air. Control pears were kept in air at 20C. Susp...

Huguet, C.G.gnard, J., 1984: Methodology of a survey in pear orchards leaf and fruit composition related to the quality of Passe Crassane pear. ACTES = proceedings Montpellier 2-8 Sept 1984: 982