Browsing by Author "Rajagopalan, A"

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Field evaluation of promising jackfruit (artocarpus heterophyllus lam.) types
(Department of Pomology and Floriculture, College of Agriculture , Padannakkad, 2018) Ajeesh, B R; Rajagopalan, A
The study entitled"Field evaluation of promising jackfruit (Artocarpus heterophyllus Lam.) types"based on morphological, yield and quality characters was undertaken in the Department of Pomology and Floriculture, College of Agriculture, Padannakkad during 2016-18. The study consisted of ten jackfruit types such as KJ 121 (fruiting thrice), KJ 173 (flakeless), KJ 180 (seedless), KJ 182 (cluster), KJ 183 (off-season), KJ 185 (early), KJ 186 (early), KJ 224 (high TSS), KJ 356 (high TSS) and KJ 397 (gumless), located in farmers‟ field in Kasargod district, already identified and characterized by Nimisha (2016) and two check varieties - Muttom Varikka and Singapore jack. Among the jackfruit types subjected to evaluation, KJ 185, KJ 121, KJ 173 and KJ 186 were observed to be early season bearers (December to February), while KJ 183 was observed to bear fruits during off season (upto August). These types could be used to fulfill the need of fruits during off season. Jack type KJ 356 and KJ 397 could be suggested for value-addition as KJ 356 possessed highest fruit weight (10.30 kg) and flake weight per fruit (3.45 kg) and KJ 397 had gumless fruits. Jackfruit types like KJ 173 (flakeless) could be used for culinary purpose whereas KJ 180 (seedless) with rudimentary seeds could be conserved for future breeding programme in jackfruit. Highest flake thickness (4.77 mm) observed in KJ 182, followed by KJ 185 (3.73 mm) and highest TSS recorded in KJ 182 (31.47oB) and KJ 185 (31.13oB) suggested the suitability of these types for dessert purposes. Jackfruit types, KJ 182, KJ 185 and KJ 186 were found to be superior in most of the quality parameters like TSS, titrable acidity, TSS-acid ratio, reducing sugar percent and carotenoid content. Hence, KJ 173 (flakeless), KJ 183 (off-season), KJ 182 (cluster), KJ 185 (early), KJ 186 (early) and KJ 397 (gumless) need to be popularized for cultivation.
Growth, yield and quality of Kaempferia galanga L. as influenced by planting time and type of seed material
(Kerala Agricultural University, 1985) Rajagopalan, A; Gopalakrishnan, P K
Asplit plot experiment was conducted at the College of Horticulture, Vellanikkara during 1982-83 with a view to find out the best planting time and type of seed material in Kaempferia gaianga L The treatments included were three planting time, viz., 3rd week of May, 1st week of June and 2nd week of June and two types of seed materials, viz., motherand finger rhizomes. Planting time had significant influence on the number of leaves per plant, leaf width, total leaf area and rhizome yields. Mother rhizome planted during the third week of May was significantly superior to other treatments with respect to rhizome and oleoresin yields. A net income of Rs. 4,316.00 per hectare could be obtained from the crop planted on 3rd week of May using mother rhizomes.
Markers assisted characterization of mango (MANGIFERA INDICA L.)
(Department of Pomology and Floriculture, College of Agriculture, Padannakkad, 2016) Suchithra B Shenoy; Rajagopalan, A
The experiment entitled “Marker assisted characterization of mango (Mangifera indica L.)” was conducted during 2013 – 2015 at the College of Agriculture, Padannakkad, with an objective to identify markers associated with dwarfness in mango. Different morphological, anatomical, physiological and molecular (RAPD) parameters were included in the study. The experiment was laid out in completely randomized design (CRD) with eight genotypes, i.e. Bappakai (V1), Chandrakaran (V2), Creeping (V3), Kalapady (V4), Kurukkan (V5), Muvandan (V6), Rumani (V9) and Vellaikolamban (V10).
Seed yield and quality as influenced by gibberellic acid (GA3) in glory lilly (Gloriosa superba L.)
(Kerala Agricultural University, 1995) Rajagopalan, A; Abdul Khader, M D
Standardisation of propagation method time of planting, time of harvest and phytochemical analysis of Kaempferia galanga L.
(Department of Horticulture (Plantation Crops & Spices), College of Agriculture, Vellanikkara, 1983) Rajagopalan, A; Gopalakrishnan, P K
A split-plot experiment was conducted at the College of Horticulture, Vellanikkara during 1982-83 with a view to standardise the propagation method, planting time and harvesting time in Kaempferia galanga L. The treatments included in the investigation were two propagation method , viz. mother rhizomes and finger rhizomes, three planting time, viz. third week of May, first week of June and second week of June; three harvesting time, viz. six, seven and eight months after planting. Planting time had significant influence on the number of leaves per plant, leaf width, total leaf area, number and girth of rhizomes and yield characters.
Vegetative propagation of promising jackfruit (Artocarpus heterophyllus Lam.) types
(Department of Pomology and Floriculture, College of Agriculture,Padannakkad, 2018) Ashok Madala; Rajagopalan, A
The investigation on ‘Vegetative propagation of promising jackfruit (Artocarpus heterophyllus Lam.) types’ was conducted at the College of Agriculture, Padannakkad, Kasaragod during the period 2017 - 18 to evaluate the success of epicotyl and softwood grafting in promising types of jackfruit and to examine the variation among jackfruit types with respect to grafting methods. The experiment comprised of five promising types of jackfruits viz., V1 - Varikka - early bearing (KJ 186), V2 - Gumless (KJ 397), V3 - Seedless (KJ 180), V4 - Cluster (KJ 182) and V5 - Muttam varikka (KJ 231) and two method of grafting i.e., M1 - epicotyl grafting and M2 - softwood grafting. The experiment was laid out in factorial CRD with three replications. The different jackfruit types showed significant influence for all the parameters studied except number of branches. Type V2 resulted in earliest sprouting (26.50 days) and maximum sprouting percentage of grafts (41.91 per cent) while type V3 recorded maximum survival percentage (66.94 per cent) and shoot length (8.13 cm). Maximum shoot girth (1.50 cm), number of nodes (7.50), number of leaves (7), length of leaf (12.34 cm) and breadth of leaf (5.64 cm) were observed in type V4. On the other hand, the maximum days to sprouting (30.33 days), minimum sprouting percentage (28.77 per cent), minimum shoot length (6.43 cm) and minimum number of leaves (5.17) were recorded in type V5 while type V1 showed minimum survival percentage (38.89 per cent), shoot girth (1.15 cm), leaf length (8.41 cm) and breadth of leaf (4.22 cm). Among the methods of grafting, the results on percentage of sprouting and survival as well as number of branches were not significant while all other parameters showed significant effects. Epicotyl grafts resulted in early sprouting of buds (26.00 days) and maximum shoot length (7.36 cm) whereas maximum shoot girth (1.36 cm), number of nodes (6.13), number of leaves (6.33), length of leaf (11.16 cm) and breadth of leaf (5.29 cm) were observed in softwood grafts. The interaction of varieties and methods of grafting were significant in most of the characters recorded. Interaction V2 x M1 was found better in early sprouting (24.33 days) and V2 x M2 resulted in maximum sprouting percentage (46.90 per cent) while V3 x M1 gave maximum survival of grafts (86.67 per cent). Hence, for the mass multiplication of Seedless type epicotyl grafting could be adopted and for other types like early bearing varikka, Gumless and cluster, softwood grafting could be practiced.