Browsing by Author "Radha, T"

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Chemical regulation of cropping in mango
(Department of Pomology and Floriculture, College of Horticulture, Vellanikkara, 2012) Randeep K R; Radha, T
Effect of different light intensities on the vegetative characters and leaf analysis of pineapple variety 'kew'
(Kerala Agricultural University, 1980) Radha, T; Aravindakshan, M; Balakrishnan, S
In studies on the influence of different intensities of shade on the growth behaviour and nutrient status of leaves of pineapple plants, it was found that the pineapple plants tolerated shaded situations even upto 75 per cent. Under shaded situations, increased leaf area and higher contents of nitrogen, magnesium and chlorophyll in leaves were recorded.
Effect of plant densities and nitrogen on the yield and quality of kew pineapple
(Kerala Agricultural University, 1996) Radha, T; Chadha, K L
Reduction in individual fruit size was resulted with increased plant density in Kew pineapple. However, the estimated yields indicated a reverse pattern owing to the increased number of plants under high density systems. Increased nitrogen levels favourably influenced the fruit measurements and estimated yields. The quality attributes were not influenced by plant densities whereas, nitrogen levels showed significant effects on quality parameters also.
Effect of Shade on Growth and Fruiting in Pineapple
(Department of Pomology & Floriculture and Landscaping, College of Horticulture,Vellanikara, 1979) Radha, T; Aravindakshan, M
The present investigations were carried out in the College of Horticulture, Kerala Agricultural University during the years 1976-1979. The object of the study was to find out the effects of shading on the growth, flowering and fruiting behaviour of pineapple variety ‘kew’. The treatments consisted of four levels of shade viz., 0, 25, 50 and 75 per cent. Shading was provided by coconut leaves on erected pandals over the plants and the intensity adjusted by using an ;Aplab’ lux meter periodically. The number of leaves produced per plant was not influenced by shading. In fact the leaf area was found to increase especially at the later stages of growth under shade. Dry matter accumulation in the leaves also was not reduced considerably in shade indicating the capacity of pineapple to tolerate shade. Early, uniform and increased flowering was noticed in plants grown under shade. Percentage of flowering was maximum at 50 per cent shade which probably indicated that the shade tolerance limit of pineapple is upto 50 per cent. Ethral was found to exhibit an inhibitory effect on flowering in the case of plants grown under shade above 25 per cent intensity. Crown growth of fruits was greatly enhanced by shade treatments and therefore the contribution of crown weight to the total fruit weight was higher in the shaded plants. Fruit weight with crown was comparable in shade and in open. Developmental pattern of fruits was not found to be influenced by shade treatments. Quality of the fruits in general, was decreased by shading. The acidity increased with shade intensity while the sugar and ascorbic acid contents decreased. Nitrogen content of leaves increased by shading, during the later stages of growth. The shaded leaves also possessed higher magnesium and lower calcium contents at all stages of estimation. Chlorophyll ‘a’, ‘b’ and total contents of leaves increased as the intensity of shade increased. Destruction of chlorophyll in the leaves in the open as evidenced by the yellowish appearance of leaves was not noticed under shade. Number of suckers produced per plant was not considerably affected by shading. Suckers produced by shaded plants were more vigorous than those produced by shaded plants were more vigorous than those produced by plants grown in the open.
Evaluation of in vitro multiplied accessions of pineapple (Ananas comosus (L.) Merr.) CV. Mauritius
(Department of Pomology and Horticulture, College of Horticulture, Vellanikkara, 1999) Pattabi Raman, S; Radha, T
Performance studies in selected varieties and hybrids of mango (Mangifera Indica L.)
(Department Of Pomology And Floriculture, College Of Horticulture, Vellanikkara, 2002) Anila, R; Radha, T
Physico-chemical analysis of alphonso and bangalora varieties of mango
(Kerala Agricultural University, 1996) Radha, T; Nair, S R; Sreejaya, K C
Physico-chemical analysis of mango varieties under Kerala conditions
(Kerala Agricultural University, Vellanikara, 2003) Anila, R; Radha, T
An evaluation of physical, morphological and biochemical characters of four varieties and two hybrids of mango were made under Kerala conditions. It was observed that Ratna fruits had the maximum length, breadth, weight, volume and circumference. The minimum contribution of stone to fruit weight was in Ratna and the maximum in Muvandan. Fruits of hybrids Ratna and H-151 recorded the highest values of TSS sugar and ascorbic acid contents. The overall perusal of the data revealed that hybrid variety Ratna had all the desirable characteristics in terms of length, breadth, weight, volume, circumference, minimum stone weight, TSS and sugar content.
Refinement of In Vitro propagation technique in Pineapple Var. Mauritius and Mass Multiplication of Elite Clones
(Department of pomology and floriculture, College of horticulture,Vellanikkara, 1996) Jo Jose, C; Radha, T
The studies on refinement of in vitro propagation technique in pineapple var. Mauritius and mass multiplication of elite clones were conducted at Kerala Horticulture Development Programme, Kerala Agricultural University, Vellanikkara during 1993 – ’95. Based on the survey conducted at the major pineapple growing areas, namely, Vazhakulam – Muvattupuzha regions of Ernakulam district, five elite clones of Mauritius variety with higher yield and other desirable fruit characters were selected propagules from the selected clones were planted at Vellanikkara for taking explants for their mass multiplication through refined in vitro propagation techniques. For shoot tip explants, treatment with emisan 0.1 per cent for 35 minutes followed with mercuric chloride 0.1 per cent for 10 minutes and for lateral bud explants treatment with emisan 0.1 per cent for 10 minutes followed by 0.1 per cent mercuric chloride for three minutes was found to be the ideal surface sterilization treatment. Culture establishment and growth initiation of shoot tip explants from different sources (suckers, crowns and slips) and lateral bud explants were better in MS medium supplemented with BAP 3 and 4 mg 1-1. Explants from shoot tips were found to be better than those from lateral buds for achieving faster culture establishment and growth initiation. Enhanced release of axillary buds was the maximum in Ms medium containing BAP 4.0 mg 1-1. Among the different subculture stages, multiple axillary bud production was higher in second suculture stage. Addition of casein hydrolysate 100.0 mg 1-1 in to the medium with BAP 4.0 mg 1-1 favoured the production of axillary buds. Adventitious bud initiation from sucker shoot tips was fastest in MS medium supplemented with BAP 5.0 mg 1-1 + NAA 1.0 or 0.5 mg 1-1. For adventitious bud production from lateral buds, treatment with BAP 7.5 mg 1-1 + NAA 1.0 mg 1-1 was the best. Proliferation rate of adventitious buds was maximum in MS medium supplemented with BAP 4.0 mg 1-1 + NAA 0.5 or 1.0 mg 1-1. Rate of multiplication of adventitious buds was higher in liquid medium under shake culture condition, than in solid medium. Faster shoot regeneration and increased vigour of the shoots were resulted in growth regulator free MS medium. However, highest number of shoots were produced in MS medium supplemented with BAP 1.0 mg 1-1. Liquid medium under shake culture condition was found superior of solid media with respect to initiation of shoots and mean number of shoots, however, the latter resulted in longer shoots. In vitro rooting was fastest in MS medium, without any growth regulator, which produced longer and normal roots with secondaries and root hairs. Though addition of NAA (3 mg 1-1) resulted in increased number of roots, they were very short and hair like. Stationary liquid medium was found superior to solid
Response of tuberose(Polianthes tuberosa L.) to organic manures and growth promoting microorganisms
(Department of Pomology and Floriculture,College of Horticulture, Vellanikkara, 2008) Mini, Sankar; Radha, T
Tuberose is one of the most important bulbous plants, much adored for its colour, elegance and fragrance. Among the commercially cultivated flowers in India tuberose occupies a prime position due to its popularity as cut flower as well as loose flower. It has got great potential in perfume industry also owing to the presence of much valued essential oil. The flower spikes are largely used for vase decoration and bouquet preparation and loose flowers for making garlands and in floral ornaments. The mineral nutrition status can affect the yield and quality of any crop. Tuberose being rich in nutritional status, extracts high amount of nutrients from the soil. Application of huge quantities of fertilizers in the same field becomes essential for taking the ratoon crops and this may lead to destruction of soil properties in addition to increased cost of production. It is now imperative to find an integrated nutrient management schedule for tuberose for an optimum and economic use of plant nutrients to reduce the cost of production and to improve the yield and quality of the flowers. The study consisted of three experiments. Experiment 1 included sixteen different treatments which were the combinations of organic manures and growth promoting microorganisms along with inorganic fertilizers. In Experiment 2, effect of different organic manures alone on growth and yield of tuberose was studied. Single variety Prajwal was used for both the trials. Three superior treatments from Experiment 1 and two from Experiment 2 were selected for conducting the third experiment using single variety Prajwal and double variety Vaibhav. In Experiment 1, the treatments 100:50:50 kg ha–1 NPK + poultry manure 22.2 t ha-1 (T3), 50:50:50 kg ha–1 NPK + poultry manure 22.2 t ha-1 (T14) and 50:50:50 kg ha1 NPK+ coirpith compost 85.71 t ha-1 (T16) exhibited superiority in terms of vegetative and floral characters. In experiment with different organic manures (Experiment 2) treatment with poultry manure alone (T4) and biogas slurry alone had positive influence on both growth and yield attributes. In third experiment it could be observed that all the vegetative parameters were significantly improved by the application of 100:50:50 kg ha-1 NPK + poultry manure 22.2 t ha-1 (T1) in Prajwal and 50:50:50 kg ha-1 NPK+ poultry manure 22.2 t ha-1 (T2) in Vaibhav. Yield attributes like days to first spike emergence, field life of the spike, number of spikes per hill and quality parameters like length and girth of the spike, length of rachis and number of flowers per hill were positively influenced by treatment with poultry manure alone (29.63 t ha-1) in Prajwal. In Vaibhav also treatment with poultry manure alone (29.63 t ha-1) produced highest number of spikes per hill, where as quality parameters of the spike were improved by the application of poultry manure along with inorganic fertilizers. (100:50:50 kg ha-1 NPK + poultry manure 22.2 t ha-1). Concrete content of flowers (which indicates the percentage of essential oil) improved in T5 (biogas slurry alone) in both the varieties. The superiority of the treatment with poultry manure was also reflected in post harvest studies. From plant nutrient analysis, it could be observed that poultry manure either alone (29.63 t ha-1) or in combination with chemical fertilizers (100:50:50 kg ha-1 NPK + poultry manure 22.2 t ha-1 and 50:50:50 kg ha-1 NPK + poultry manure 22.2 t ha-1) recorded highest N and P content of leaves and tubers in both the varieties, where as treatment of coir pith compost along with inorganic fertilizers exhibited maximum K content. Soil properties like pH, organic carbon, available N, P and K were found to be improved by the treatment consisting of poultry manure. Regarding the economics of cultivation, treatment with poultry manure alone (29.63 t ha-1) recorded maximum net income and highest B/C ratio in both the varieties (3.2 in Prajwal and 2.5 in Vaibhav) followed by 100:50:50 kg ha–1 NPK + Poultry manure 22.2 t ha-1and 50:50:50 kg ha-1 NPK + poultry manure 22.2 t ha-1 . Considering overall performance, application of poultry manure at the rate of 29.63 t ha-1 as basal dose was proved to be highly beneficial for growth and yield improvement in tuberose.
Some successful crosses in pineapple
(Kerala Agricultural University, 1994) Radha, T; Pushkaran, K; Jacob John, P
Studies on fruit drop in mango varieties
(Kerala Agricultural University, Vellanikara, 2003) Anila, R; Radha, T
Page Header OPEN JOURNAL SYSTEMS Journal Help USER Username Password Remember me NOTIFICATIONS View Subscribe JOURNAL CONTENT Search Search Scope Browse By Issue By Author By Title FONT SIZE Make font size smallerMake font size defaultMake font size larger INFORMATION For Readers For Authors For Librarians HOME ABOUT LOGIN SEARCH CURRENT ARCHIVES REGISTRATION FOR NEW AUTHORS Home > Journal of Tropical Agriculture > Anila Studies on fruit drop in mango varieties R. Anila, T. Radha Abstract Studies on fruit set and fruit drop were carried out in Kerala Agricultural University on six varieties of mango during 2000-2001. The season of flowering in majority of the varieties was during December–January months except in Neelum in which it was during April-May. The number of inflorescence per square metre ranged from 23.6 to 7.0 and was the maximum in Prior and minimum in Alphonso and Neelum. In the case of percentage of bisexual flowers Alphonso had the maximum (44.39%)bisexual flowers and Muvandan had the minimum. Variation in length, breadth, colour and density of inflorescence was noticed among the varieties. Initial fruit set ranged from 5.39 to 8.45 fruits per inflorescence. Drop occurred to the tune of 50% during the initial 15 days and continued for 45 days. Maximum drop was noted in Alphonso (89.93%) and the minimum in H-151 (79.6%).