Abstract
An experiment was conducted at the experimental farm of Department of Floriculture and Landscaping, Punjab Agricultural University from 2015 to 2016 with the objective to standardize the optimum concentration of different growth retardants for alteration of plant architecture and improvement of flowering parameters in chrysanthemum (Chrysanthemum morifolium Ramat.) cv. Anmol. The experiment was conducted in completely randomized design (CRD) with three replications comprising ten pots per replication. Cycocel (@ 500, 750, 1000, 1250 and 1500 ppm), Daminozide (@ 500, 750 and 1000 ppm) and Ethephon (@ 250, 500 and 1000 ppm) were sprayed on chrysanthemum cv. Anmol (spray type) after one month of transplanting. The effect of growth retardants in reduction of plant height followed the order daminozide> ethephon> cycocel. Internodal length was much reduced by daminozide @ 1000 ppm. Highest plant spread, diameter of main stem and leaf area was obtained under daminozide @ 1000 ppm. Floral characters like days to bud appearance, days to colour break stage and days to full bloom stage was obtained earlier in daminozide @ 1000 ppm and later in ethephon @ 1000 ppm. Flower diameter was much increased by daminozide @ 500 ppm. Highest number of flowers/plant was obtained under daminozide @ 1000 ppm. Highest duration of flowering was obtained under daminozide @ 1000 ppm and minimum under ethephon @ 1000 ppm.
Publisher
Indian Council of Agricultural Research, Directorate of Knowledge Management in Agriculture
Subject
Agronomy and Crop Science
Reference17 articles.
1. Anderson N O. 2006. Chrysanthemums, Dendranthema x grandiflora Tzvelv. (In) Flower Breeding and Genetics, pp 389–37. Anderson N (Ed.). Springer, Dordrecht.
2. AsrarA W, Elhindi K and Salam E A. 2014. Growth and flowering response of chrysanthemum cultivars to Alar and slow-release fertilizer in an outdoor environment. J F Agri & Env 12 (2): 963–71.
3. Bhattacharjee S K. 2006.Advances in ‘Ornamental Horticulture, pp 35. Pointer Publishers, Jaipur.
4. Cathey H M. 1964. Physiology of growth retarding chemicals. Annual Review of Plant Physiology 15: 271–2.
5. Cathey H M. 1975. Comparative plant growth retarding activities of ancymidol with ACPC, phosfon, Chlormequat and SADH on ornamental plant species. Hort Science 10: 271–316.