The growth, yield and quality of potato growth from true potato seed (TPS) as influenced by growth retardant
2001
Solomon Eyob(University of Agriculture Science, Banglore) | K.S. Krisinappa(University of Agriculture Science, Banglore)
Investigations were carried out at the University of Agricultural Sciences, Bangalore state, India in 1996/97 cropping seasons to assess the influence of three growth retardants (Cycocel-CCC, Mepiquat chloride -MC and paclobutrazol-PBZ) and their stages of applications (45 and 60 days after transplanting -DAT) on growth, yield and quality of potato grown from TPS. Plant height, number of leaves, number of branches, leaf area, leaf area index, chlorophyll "a" content, starch content, reducing sugar, non-reducing sugar and total sugars content were significantly (P0.05) affected by stages of application. All the above indicated parameters were significantly (P0.05) influenced by growth retardants with exception of number of leaves and branches. Number of tubers per plant and total tuber yield were not significantly effected whereas yield per hectare was significantly (P0.05) affected by spraying growth retardants. The highest remarkable mean tuber yield was obtained from MC (231.94 q/ha) and CCC (227.25 q/ha) as compared to PBZ (189.72 q/ha) and water spray (171.08 q/ha). Significantly (P0.05) high starch (76.02 q/ha) and total sugar (2.13%) content in PBZ. Lowest starch (69.37%) and total sugar (1.99%) were found in the control was recorded. These investigation indicated that farmers in potato growing areas can adopt MC and CCC spray in TPS technology to increase tuber size under field conditions.
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