A field experiment was carried out at Kittur Rani Channamma College of Horticulture, Arabhavi, Karnataka, for two years to study the influence of spacing and time of harvest on biomass production and its accumulation in Coleus forskohlii. Pooled analysis of yield data indicated that significantly higher total biomass (TBP) was produced when planted at a spacing of 60 cm x 20 cm (10.08 t ha-1) followed by 75 cm x 20 cm (9.92 t ha-1). There was increase in tuber biomass production with decrease in plant to plant spacing (1.04 t ha-1 at 60 cm x 30 cm and 1.57 t ha-1 at 60 cm x 20 cm). Shoot biomass accumulation was higher at 75 cm x 20 cm and 60 cm x 20 cm. Increase in biomass accumulation in tubers was not significant beyond 160 days after planting (DAP) (1.39 and 1.45 t ha-1 at 160 and 180 DAP, respectively). The total biomass production and its accumulation in the above ground portion and tubers were significantly higher in the treatment combinations, 60 cm x 20 cm at 180 DAP (11.15, 9.38 and 1.77 t ha-1, respectively) and also at 160 DAP (9.45, 7.72 and 1.73 t ha-1, respectively). Harvest index (HI) was found higher at closer spacing of 60 cm x 20 cm (0.121) and at 160 DAP (0.135). Interaction effects of spacing and time of harvest indicated that coleus cultivar K-8 may be planted at a spacing of 60 cm x 20 cm and harvested at 160 DAP to get higher tuber yield and harvest index.
The purpose of this study was to investigate the effects of different treatments on seed germination in jamun (Syzygium cuminii Skeels). This species is known to have short time of viable seeds. An investigation was carried out in department of Fruit Science, Kittur Rani Channamma College of horticulture, Arabhavi during year 2015-16. Six treatments viz., T1- Poly bag (300 gauges thick), T2- Poly bag + Charcoal powder, T3- Poly bag + Carbendazim, T4- Poly bag + Saw dust, T5- Poly bag + Trichoderma harzianum and T6- Control (Paper bag) were used for evaluating the germination. Germination index was recorded highest in Trichoderma harzianum + Poly bag and seeds of Poly bag, compared to other treatments while, the untreated seeds recorded the least germination index. Vegetative parameters like seedling height and number of leaves was significantly more in Trichoderma harzianum + Poly bag treated seeds at 60 and 75 days of sowing (DAS). Prolonging the viability of seeds for more days would facilitate the availability of seeds for multiplication and also use by local farmers throughout the year.
At the college of Horticulture, Mysuru, Karnataka, the study was conducted during 2018 kharif using RBD with two replications. Quantitative characters namely petiole length, leaf length, leaf breadth, bud length, bud breadth, flower diameter, flower stalks length or pedicel length, calyx length, the number of sepals/ calyx teeth, the number of whorls, the number of petals, petal length, the number of stamens, length of the anther, length of the filament, length of the style, length of the stigma, length of the corolla tube and flower bud weight were recorded. High (>20%) genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) was observed for bud length, bud breadth, the number of whorls, the number of petals, pedicel length, length of corolla tube, length of filament, length of style, length of stigma and flower bud weight. Moderate (10 to 20%) GCV and PCV were observed for petiole length, leaf length, leaf breadth, flower diameter, calyx length, the number of calyx teeth, petal size and the number of stamen and length of the anther. The phenotypic co-efficient of variation was more than the genotypic co-efficient of variation for all characters studied. The higher (>20%) values of genetic advance over mean (GAM) coupled with very high (>80%) estimates of heritability were observed for characters viz., bud length, bud breadth, flower diameter, calyx length, the number of calyx teeth, the number of whorls, the number of petals, petal size, pedicel length, length of the corolla tube, the number of stamens, length of anther, length of the filament, length of the style, length of the stigma and flower bud weight. Moderate heritability (40-60%) with low GAM was observed for petiole length. The variance due to genotypes was highly significant for all the characters except for length of the leaf. Keywords: Mysuru mallige, genetic advance heritability, PCV, GCV
To know the association of various growth and yield attributing traits with the complex yield, eighteen genotype of ridge gourd were subjected to study the genotypic and phenotypic correlation and path analysis. High genotypic co-efficient of variation (GCV) was observed for yield per vine, chlorophyll content of leaf and proline content of leaf indicating little influence of environment and the presence of inherent association between characters. Vine length (0.460), number of leaves (0.578), number of fruits per vine (0.993), fruit length (0.830) and days to first female flowering (-0.269) to the fruit yield per vine at both genotypic and phenotypic level, the associations of these characters is in the desirable direction. Thus, selection for these characters will improve the yield. Path coefficient analysis revealed that number of leaves per vine, tendril length, number of fruits per vine and fruit diameter showed positive direct effects on total yield per vine.
An investigation on “Success of softwood grafting in jamun” was carried out in department of Fruit Science, Kittur Rani Channamma College of horticulture, Arabhavi during year 2015-16. Seven treatments comprised of different age of rootstocks viz., T1 (6 month), T2 (5 and half month), T3 (5 month), T4 (4 and half month), T5 (4 month), T6 (3 and half month) and T7 (3 month) were used for softwood grafting. The influence of age of rootstocks on the graft success and graft survivability at 60 and 90 days after grafting (DAG) did not show significant difference among the treatments. At 30, 60 and 90 DAG, significantly differences were observed for graft girth and number of sprouts. At 30 and 60 DAG, significant higher number of leaves per graft was recorded. Thus, the findings of the present investigation may be helpful in improvement programme, enhancing for large scale multiplication.
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