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999			_c27078 _d27078
003			OSt
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008			140128s9999 xx 000 0 und d
082			_a635.6 _bSRE/EF
100			_aSrividhya M
245			_aEfficacy Of Bioregulants On Growth And Productivity In Tomato (lycopersicon esculentum MILL)
260			_aVellanikkara _bDepartment of Olericulture, College of Horticulture _c2003
502			_bMSc
520	3		_aAn experiment was carried out at the College of Horticulture, Kerala Agricultural University, Vellanikkara during August 2002-July 2003 to study the efficacy of three levels ofbioregulators viz., PCPA (25,50 and 75 ppm), NAA (10, 20 and 30 ppm), CCC (25, 50 and 75 ppm) and 2,4-D (0.5, 1.0 and 2.0 pp m) on growth, fruit set, yield and quality in tomato. The bioregulators were sprayed at three different stages of the crop growth viz., 15, 30 and 45 DAT. The bacterial wilt resistant variety Sakthi was used for the study. The experiment was laid out in Randomized Block Design with two replications. \ All the bioregulators significantly influenced the vegetative characters like height of the plant and number of branches. While the treatments with NAA increased the height of t le plant, CCC reduced the same. Treatment of plants with CCC at all concentrations increased the number of branches. The bioregulators PCPA and 2,4-D had a negative influence on the plant height and number of branches as they recorded a lower height and number of branches than control. The growth parameters like RGR, NAR, LAI, CGR and LAD were positively influenced by CCC and NAA while the PCPA and 2,4-D treatments reduced the same, except NAR and CGR. Earliness was influenced by the bioregulators during summer. The plants treated with PCPA flowered earlier (5-10 days than- control) and produced early yield (10-15 days than control). NAA was found to be effective in inducing earliness during rabi. All the bioregulators were effective in increasing the per cent fruit set, number of fruits and fruit yield. The bioregulator CCC during both the seasons, NAA during rabi and PCP A during summer were effective in increasing per cent fruit set. The treatments with CCC increased the per cent fruit set, number of fruits and yield per plant by 57.67, 42.74 and 61.53 per cent respectively. Treating the plants with CCC 75 ppm was found to be effective in increasing the productivity of the crop during both rabi and summer with 17.54 and 5.63 tonnes per hectare respectively, while control recorded 13.07 and 1.17 tonnes per hectare during rabi and summer respectively. The increase in the yield over control was 34.20 per cent during rabi and 381.19 per cent during summer. Plants treated with PCPA resulted in severe vegetative malformations, up to an extent of 90 per cent. The malformations noticed were upward cupping of leaves and thickening of lamina. Fruit malformations were noticed in 2,4-D and CCC treated plants. The biochemical characters like TSS and ascorbic acid were not highly influenced by the bioregulators. Cercospora leaf spot incidence was reduced by the bioregulator treatments with PCPA recording 75 per cent less incidence of the disease than control.
700			_aBaby Lissy Markose (Guide)
856			_uhttps://krishikosh.egranth.ac.in/handle/1/5810105534
942			_2ddc _cTH