Research Report

Effect of Pinching and Growth Retardants on Flowering and Yield of African marigold (Tagetes erecta L.) var. Pusa Narangi Gainda  

Naresh Chandra Pushkar , Singh A.K.
Department of Floriculture and Landscaping, College of Horticulture & Forestry Narendra Deva University of Agriculture & Technology, Faizabad- 224229 (U.P.), India
Author    Correspondence author
International Journal of Horticulture, 2012, Vol. 2, No. 1   doi: 10.5376/ijh.2012.02.0001
Received: 01 Nov., 2012    Accepted: 05 Nov., 2012    Published: 08 Nov., 2012
© 2012 BioPublisher Publishing Platform
Preferred citation for this article:

Naresh C.P., and Singh A.K., 2012, Effect of Pinching and Growth Retardants on Flowering and Yield of African marigold (Tagetes erecta L.) var. Pusa Narangi Gainda, International Journal of Horticulture, 2(1): 1-4 (doi: 10.5376/ijh.2012.02.0001)

Abstract

The effects of different chemicals treatment on postharvest cut flower quality of hybrid lily cultivar ‘Eyeliner’ were investigated. Lily stems were harvested when the first flower bud showed full colour. A whole stem (leaf and bud) sprayed with water (control) and with a growth regulator solutions containing TDZ (1&2ppm), BA (25 ppm), GA3 (25 ppm), BA (50 ppm) , GA3  (50 ppm), BA +GA3 (25ppm +25 ppm), BA+GA3 (50ppm +50 ppm), SAMRAS (2&4mlL-1), Agri-Herbo-99 (1&2ml L-1) and Super Gibbre (1&2ml L-1). After the treatments, each stem was then maintained for postharvest evaluation in an individual 500 ml conical flask with 300 ml of normal tap water.  Within each treatment, the numbers of buds per stem were kept constant as possible for ease of data recording. In general, BA alone or in combination with GA3 treatments significantly delayed the flower bud opening. Leaf yellowing and flower senescence was substantially delayed up to one week when cut flowers were sprayed with a solution containing TDZ (2ppm). Application of BA @ 50 ppm significantly delayed total chlorophyll (a+b) degradation after 6 and 9 days. After 3 days sharp increase in total chlorophyll content was found when cut stems were sprayed with 1 ppm TDZ and slightly declined after 6 and 9 days. In conclusion, TDZ @ 2 ppm not only delayed leaf yellowing but also reduced onset of petal senescence in Lilium cut flowers. BA was able to delay the chlorophyll degradation.

Keywords
Pinching; Growth retardants; African marigold
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