Effect of plant growth regulators on growth, flowering and flower yield of desi red rose (Rosa damascena L.)

Abstract

The experiment was carried with objective to find out effect of different plant growth regulators spray on desi red rose at College Flower Nursery, Department of Horticulture, B. A. College of Agriculture, AAU, Anand. During the experiments different growth regulators such as Gibberellic acid, NAA, and CCC were sprayed two times i.e. 30 and 60 days after pruning. The results of the three years pooled indicates that Gibberellic acid 150 mg/l recorded maximum plant height, number of primary branches at 45 days after pruning and same treatments had also recorded significantly higher primary and secondary branches at 90 days after pruning as well as flower diameter, weight of flowers, number of flowers per plants, shelf life and yield. While, NAA 75 mg/l was recorded significantly maximum number of secondary branches at 45 days after pruning. The significantly minimum day taken for first flower initiation was recorded with foliar spray of CCC 1000 mg/l.