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Item Isoenzyme variation in Piper nigrum L.(Kerala Agricultural University, 2000) Abraham Sebastian; Sujatha, V S; Nybe, E V; Sreekandan Nair, G; Mallika, V KIsoenzyme patterns of 26 varieties of P. nigrum were compared for three enzymes viz., csterase, peroxidase and glutamate oxaloacetate transaminase. Similarity among the varieties ranged from 0.40 1.00. Wide variation was observed among the cultivated types of P. iiignini for the three enzymes analysed.Item Stimulation of seed germination in white flowered leadwort (Plumbago zeylanica l.)(Kerala Agricultural University, Vellanikara, 2001) Jalaja S, Menon; Prasannakumari Amma, S; Nybe, E VItem Analysis of growth and yield in Plumbago spp.(Kerala Agricultural University, Vellanikara, 2001) Jalaja S, Menon; Prasannakumari Amma, S; Nybe, E VStudies on growth and yield of Plumbago rosea and Plumbago zeylanica were undertaken in the College of Horticulture, Kerala Agricultural University, Thrissur during 1995 to 1998. Studies on growth up to 18 months after planting revealed that the two species exhibited a linear pattern of growth. There was no significant difference in fresh root yield of the two species. However, P. rosea recorded 7.78 per cent higher yield than P. zeylanica at 18 months after planting. The dry root yield was found to be significantly higher in P. zeylanica and the percentage of increase in yield in P. rosea was 83.5. It was observed that retention of crop in the field up to 18 months increased dry root yield by 2.27 times in P. rosea and 2.01 times in P. zeylanica as compared to harvesting at 12 moths after planting.Item Effect of time of planting on growth and yield of irrigated Nendran banana(Kerala Agricultural University, Vellanikara, 2001) Susamma P, George; Nybe, E V; Gopalakrishnan, T R; Manomohandas, T P; Kumaran, KField experiments were conducted at the Regional Agricultural Research Station, Ambalavayal for three years to standardize the best time of planting of irrigated banana var. Nendran (AAB) for maximum growth and yield of quality bunches. Suckers were planted at monthly interval on the first of every month starting from July to December. July to October plantings were equally good for mean bunch weight (7.83, 8.38, 8.10 and 8.20 kg respectively) and were superior to November and December plantings (5.28 and 4.14 kg respectively). November and December plantings recorded minimum value for all the growth and bunch characteristics studied except crop duration. Planting of Nendran beyond October enhances the crop duration.Item Survey, evaluation and identification of black pepper cultivars(Kerala Agricultural University, Vellanikara, 2001) Prasannakumari Amma, S; Nybe, E V; Sujatha, V S; Prabhakaran, P VA survey was conducted in the traditional pepper growing tracts of Thodupuzha and Meenachil taluks of Kerala during 1995. Thirty holdings per each taluk were selected. The pepper cultivars grown in these selected homesteads were evaluated for yield and yield contributing characters for the two years. Results showed that in Thodupuzha taluk, Neelamundi, Kaniyakkadan and Mundi performed best. In Meenachil taluk, Karimunda was the best during the first year. However, during 1997, Jeerakamunda was the highest yielder. Karimunda, the most popular cultivar in these areas recorded relatively poor performanceItem Organic manures and biofertilizers on nutrient availability and yield in black pepper(Kerala Agricultural University, Vellanikara, 2003) Filitte, Stephen; Nybe, E V