2. Institutional Publications

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    Effect of application of plant growth regulators on pepper (Piper Nigrum L.)
    (Kerala Agricultural University, 1988) Salvi, B R; Desai, A G; Salvi, M J
    Different growth regulators whan used in proper concentrations have a promise in increasing the yield of pepper. GA, NAA, 2,4-D (20ppm) and Planofix (100 ppm) seem to be promising in both the methods of application i.e., either by spraying or dipping. Though, application of GA increased the yield significantly batter than the other treatments, its high cost does not permit its economic use. Cost benefit shows that application of plant growth regulators by dipping is rather costly as compared to spraying. Spraying of pepper vines with Planofix at 100 ppm, NAA at 10 ppm and 2,4-D at 20 ppm seems to be more effective in increasing the net return per hectare of pepper cultivation. The additional net returns per hectare over control was recorded by these concentrations are Rs. 4,147; 3,762, and Rs. 3,751, respectively.
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    Effect of ethrel, 2,4-D and MH on growth, rhizome yield and diosgenin content in costus spec/os us (Koening) smith
    (Kerala Agricultural University, 1994) Satheeshan, K N; Mohanakumaran, N
    An experiment to study the effect of ethrel, 2,4-D and MH on the growth, rhizome yield and diosgenin content in Costus speciosus was conducted at the College of Horticulture, Vellanikkara. Plant height was significantly reduced by ethrel and MM at the levels tried. Ethrel 100 and 200 ppm significantly increased the number of tillers per plant. The length, width and leaf area and internodal length of shoot was significantly reduced by ethrel treatments while total leaf area was higher in plants treated with 2,4-D (10 and 20 ppm). Ethrel 200 ppm recorded maximum yield of green and dry rhizomes. Diosgenin content of the rhizome was found to be the highest in the plants treated with 2,4-D 10 ppm. Shoot/rhizome ratio was significantly reduced by Ml I treatments.
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    Yield, quality and shelf life of bittergourd (Momordica Charantia Linn.) fruits as influenced by plant growth regulators
    (Kerala Agricultural University, 1994) Veenakumari, D; Raju, V K; Devadas, V S
    Effect of pre-harvest application of GA (200 and 300 ppm), CCC (250 and 500 ppm) and MH (500 and 1000 ppm) as compared to a no-spray control, on growth, quality components and storage life of hittergourd fruits of MC 84 was studied during 1992. The chemicals were applied twice; 10 days after the first fruit set and 15 days after the first application. GA at 300 ppm produced the highest yield, length and girth of fruits which was followed by GA 200 ppm. Moisture content was maximum in fruits obtained from plants treated with CCC at 250 ppm, whereas the highest ascorbic acid content was in fruits of GA (200 ppm) treated plants. Maximum shelf-life of fruits was observed with MH (500 ppm) spray.
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    In vitro plant regeneration from shoot tip culture of blackgram (Vigna mungo (L.) Hepper)
    (Kerala Agricultural University, 1998) Geetha, N; Venkatachalam, P; Rao, G R
    In vitro culture of blackgram | Vigna mango (L.) Hepper] cv. LBG was initiated from 7 day old aseptic seedling shoot tips. Isolated shoot tips were cultured on MS medium containing various concentrations and combinations of cytokinins and auxins. High frequency of callusing and shoot differentiation was observed on MS medium supplemented with BAP (3.0 nig 1') and NAA (1.5 mg 1 '1. A single shoot tip produced more than 12 shoots. The regenerated shoots were rooted on MS medium supplemented with different concentrations of IBA. Seventy five per cent of the shoots produced rts, and 90-95% of them survived in the field condition