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Effect of CPPU and GA3 on growth and quality of 'Marroo Seedless' grape
- Kittiwatsopon, K., Karintanyakit, P.
- Acta horticulturae 2014 no.1059 pp. 189-194
- flowering, forchlorfenuron, gibberellic acid, grape juice, grapes, inflorescences, small fruits, Thailand
- Concentration effects of forchlorfenuron (CPPU), N-(2-chloro-4-pyridnyl)-Nâ-phenylurea and gibberellic acid (GA3) on cluster weight, berry number and juice characteristics of âMarroo Seedlessâ grape were studied at Pakchong Research Station, Pak Chong, Nakhon Ratchasima, Thailand from 28 February to 10 June 2012. Inflorescences were sprayed with 20 ppm CPPU at seven days after full bloom, resulting in a highly significant difference in cluster weight (436.80 g) and berry number (263.13 berries per cluster). Without the application of plant bioregulators, the heaviest berry weight and berry size were 2.68 and 1.58 cm in diameter, respectively. Clusters sprayed with 100 ppm GA3 at seven days after full bloom and inflorescences sprayed with 2.5 ppm GA3 at seven days before bloom produced excellent quality grape juice.