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EFFECT OF PLANT GROWTH RETARDANTS, GROWTH REGULATORS AND SPACINGS ON GROWTH AND FLOWER YIELD OF AFRICAN MARIGOLD (Tagetes erecta L.) cv. PUSA NARANGI GAINDA
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| Title |
EFFECT OF PLANT GROWTH RETARDANTS, GROWTH REGULATORS AND SPACINGS ON GROWTH AND FLOWER YIELD OF AFRICAN MARIGOLD (Tagetes erecta L.) cv. PUSA NARANGI GAINDA
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| Creator |
JAKKANA HARITHA NAIDU
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| Contributor |
Dr.P. ASHOK
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| Subject |
flower yield ,nodal length,vegetative characters
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| Description |
Studies on “Effect of plant growth retardants, growth regulators and spacing on vegetative growth and flower yield of African marigold (Tagetes erecta L.) cv. Pusa Narangi Gainda” was conducted at Horticultural Research Station, College of Horticulture, Venkataramannagudem, Tadepalligudem, West Godavari during 2010-11. The study was carried out with two experiments. Expt-I: To study the effect of two spacings 30 x 20 cm and 40 x 20 cm and also the effect of exogenously applied growth regulators i.e. GA3, NAA and Ethrel at concentrations, 250 ppm 350 ppm, and 450 ppm respectively on growth and flower yield in African marigold cv. Pusa Narangi Gainda with 20 treatments replicated thrice in RBD with factorial concept. Expt-II - To study the effect of two spacings 30 x 20 cm and 40 x 20 cm and also the effect of exogenously applied Plant growth retardants i.e. MH, CCC and TIBA at concentrations of 750 ppm, 1000 ppm and 1250 ppm respectively on growth and flower yield in African marigold cv. Pusa Narangi Gainda with 20 treatments replicated thrice in RBD with factorial concept. Among the growth regulators studied, GA3 and NAA had promotive effect on vegetative characters like plant height and inter nodal length. Ethrel suppressed plant height, inter nodal length and enhanced plant spread and number of laterals. GA3 at 350 ppm advanced flowering, increased flower weight, flower size and flower yield. Ethrel at 350 ppm increased number of flowers per plant and reduced flower size and flower weight. Among the growth retardants studied, CCC, TIBA and MH suppressed plant height, inter nodal length and enhanced the plant spread, number of laterals over control. MH at 1250 ppm enhanced number of flowers and CCC at 750 ppm recorded maximum flower yield per plant and hectare. TIBA at 1000 ppm recorded maximum flower size, flower weight. Among the spacings studied, 40 x 20 cm reduced plant height, inter nodal length and enhanced plant spread, number of laterals and enhanced the floral characters i.e. number of flowers, flower size, flower weight and flower yield per plant. Spacing 30 x 20 cm enhanced plant height, advanced flower initiation and increased flower yield per hectare due to increased plant population per unit area. The treatment combination of Ethrel at 250 ppm with 30 x 20 cm spacing recorded more flower yield per hectare. |
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| Date |
2016-07-22T15:43:38Z
2016-07-22T15:43:38Z 2011-06 |
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| Type |
Thesis
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| Identifier |
http://krishikosh.egranth.ac.in/handle/1/69408
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| Language |
en
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| Format |
application/pdf
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| Publisher |
ANDHRA PRADESH HORTICULTURAL UNIVERSITY
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