Effect of Pinching and Growth Retardants on Growth and Flowering in African Marigold Cv. Pusa Narangi Gainda

K. Sasikumar, V. Baskaran, K. Abirami

Abstract


A study on the effect of pinching and application of growth retardants on growth and flowering in African marigold cv. 'Pusa Narangi Gainda' was carried out in the experimental field of Division of Floriculture and Landscaping, Indian Agricultural Research Institute, New Delhi. Treatments comprised pinching, CCC applied at 1000ppm, 1500ppm or 2000ppm, MH at 500ppm, 1500ppm or 2000ppm; B-9 at 500ppm, 750ppm or 1000ppm, and a Control (no pinching). CCC at 2000ppm recorded minimum plant height (46.0cm), maximum plant-spread (56.0cm) and maximum number of branches (19.0), whereas, maximum plant height (67.0cm), minimum plant-spread (29.66cm) and minimum number of branches (5.33) were recorded in Control (non-pinching). As for flowering and yield, application of CCC at 2000ppm recorded maximum flowering-duration (25.33 days), number of flowers per plant (40), single-flower weight (119.46g), flower yield per plant (408.10g), flower yield per unit area (17.83t/ha) and seed yield per plant (17.80 g), Maximum flower diameter (7.93cm) was recorded with application of CCC 2000ppm, whereas, minimum was recorded with pinching (6.2cm). Spray of growth retardants enhanced flower yield compared to that in Control (no pinching). Maximum shelf-life of flower was recorded with CCC 2000ppm (3.66 days), whereas, minimum was recorded with pinching and non-pinching (2.33 days). Thus, application of CCC at 2000ppm is superior to other treatments tested for increasing flower yield in marigold.

Keywords


Marigold, Pinching, Non-Pinching, Growth Retardants.

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References


Dutta, J.P. and Ramdas, S. 1997. Growth and flowering response of chrysanthemum (Dendranthema grandiflora Tzelev.) to growth regulator treatments. Orissa J. Hort., 25:81-86

Girwani, A., Srihari Babu, R. and Chandrasekhar, R. 1990. Response of marigold (Tagetes erecta) to growth regulators and zinc. Indian J. Agril. Sci., 60:220-222

Jay Holcomb, Eorse, D. Turkey and Mark A. Rose 1991. Effect of GA on inflorescence in Uniconazole treated chrysanthemums. Hort. Sci., 26:312

Leena Ravidas, Rajeevan, P.K. and Val Salakumari, P.K. 1992. Effect of foliar application of growth regulators on the growth, flowering and corm yield of gladiolus cv. Friendship. S. Indian Hort., 40:329-335

Narayana Gowda, J.V. and Jayanthi, R. 1991. Effect of Cycocel and maleic hydrazide on growth and flowering of African marigold (Tagetes erecta L.). Prog. Hort., 23:114-118

Ninnemann, H., Zeevart, J.A.D., Kendy, H. and Lacy, A. 1964. The plant growth retardant CCC as an inhibitor of gibberellin synthesis in Fusarium moniliformae. Planta, 61:229-235

Parmar, A.S. and Singh, S.N. 1989. Effect of plant growth regulators on growth and flowering of marigold (Tagetes erecta L.). S. Indian Hort., 31:53-54

Raju Dantuluri, V.S. 2000. Effect of plant growth regulators and disbudding on growth and development of Asiatic hybrid lily cv. Corrida. M.Sc. Thesis, Indian Agricultural Research Institute, New Delhi, 44p

Syamal, M.M., Rajput, C.B.S., Upadhyay, R.K. and Singh, J.N. 1990. Effect of GA3 and MH on growth, flowering and seed yield of marigold and China aster. Indian J. Hort., 47:439-441

Talukdar, M.C. and Paswan, L. 1994. Effect of GA3 and CCC on growth and flowering of chrysanthemum (Dendranthezma grandiflora Tzvelev.) cultivar Turmvuli. Hort. J., 7:141-144






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