Research Articles

Permanent URI for this collection

http://localhost:4000/handle/123456789/7336

Browse

Now showing 1 - 20 of 614

1505 million extra nuts from field bunds
(2007-02-08) Bhaskara Rao, K.B.
A ‘2^7Confounded design' for a manurial experiment on coconut
(1969-04) Davis, T.A.
A mioronutriont-manurial experiment on a factorial 2^7 confounded design was started in 1053 on a 8-hoctaro coconut plantation at the Central Coconut Research Station, Kayangu-lam, Kerala State as an attempt to control the Root (wilt) disease affecting the palms. The micro-nutrients tried were Boron, Copper, Manganese, Iron, Molybdenum, Zinc, as well as Magnesium. Data on the fruit-yield and other morphological characters were recorded on the 384 experimental palms from the inception of the experiment. The fruit-yield data alone upto and inclusive of 1000 were considered for the Analysis of Covariance and the results reported. After 1000, the micro-nutrients were administered directly into the palms in liquid form by a different method. Results of analysis have revealed that the healthy palms did not show any significant response to the application of any of the micro-nutrients. But palms in the early satge of the root (wilt) discard res ponded favourably to the treatment combination of Boron and Iron. However, when applied alone or in combination with Copper, Iron depressed the nut-yield in this category of palms significantly. Severely diseased palms responded very favourably with Magnesium and Molybdenum when applied individually.
5-Azacytidine promotes the induction of embryogenic calli and somatic embryos from transverse thin cell layer (tTCL) cultures in coconut
(2024) Keezhath Thazha Kuniyil Amritha; Muralikrishna, K.S.; Jasmin Habeeb; Chandran, K.P.; Paulraj, S.; Rajesh, M.K
Coconut (Cocos nucifera L.) is highly recalcitrant to in vitro interventions. There is a need to overcome various bottlenecks to standardize a repeatable protocol for in vitro regeneration in coconut to meet the requirements of quality planting materials. Epigenetic processes, especially DNA methylation, are known to assay crucial roles in regulating genes controlling plant growth and development, especially somatic embryogenesis. In this study, we demonstrate that the supplementation of 5-azacytidine (5-azaC), a demethylating agent, in the coconut tissue culture media can enhance the formation of embryogenic calli, somatic embryos, and plantlet regeneration from transverse thin sections of mature zygotic embryos. Transverse thin cell layer (tTCL) sections of zygotic embryos were cultured onto Y3 medium supplemented with different concentrations of 5-azaC (0, 10, 15, and 20 μM), auxins (2,4-D, picloram and atrazine; 75 and 100 μM) and thidiazuron (TDZ;4.5 μM). Explants were exposed to constant 5-azaC and reduced auxin concentration in subsequent sub-culturing. Our results indicated supplementing 15 μM 5-azaC, in combination with picloram (75 μM) and TDZ (4.54 μM), improved the percentage of callusing (95.8%) and formation of embryogenic calli (87.5%), and formation of somatic embryos (4.7) and plantlets (4.0) per explant in comparison with control having 80.8%, 75.0%, 1.6 and 0.67, respectively from tTCL sections of mature zygotic embryos. The results will form the basis for designing more efficient coconut tissue culture protocols.
A new pod bioassay method to determine the toxicity of insecticides against Tea mosquito bug, Helopeltis theivora
(2024) T. N. Madhu; Saneera, E.K; R. Thava Prakasha Pandian; Sujithra, M; Bhavishya; Nagaraja, N.R.; Elain Apshara, S.; Josephrajkumar, A.; Rajesh, M.K
Abnormal Stomatal Opening in Coconut Palms Affected with Root (Wilt) Disease
(2007-02-08) Rajagopal, V.; Patil, K.D.; Sumathy Kutty Amma, B.
Studies on the stomatal regulation in the root (wilt) affected coconut palms (Cocos nucifera L.) revealed that the diseased palms had low stomatal resistance compared to the healthy palms, irrespective of their age. The same trend was observed whether the determinations were made at different times of the day(6 18 h) or under irrigated and unirrigated conditions or in different seasons (dry and wet). Thus, the stomatal regulation was significantly impaired in the diseased palms resulting in excessive water loss compared to the healthy palms. Results arc discussed with the available literature on other similar disease caused by Fungi, bacteria and mycoplasma-like organisms in different plants.
Abnormalities in Arecanut
(1956) Murthy, K.N.; Bavappa, K.V.A.
Abnormalities in arecanut
(1959) Murthy, K.N.; Bavappa, K.V.A.
Absorption, Distribution and Utilization of Radioactive Phosphorus in Healthy and Root (Wilt) Diseased Coconut Palms
(2007-02-08) Snehi Dwivedi, R.; Ray, P.K.; Sunny Ninan
Radioactive KH,PO4 was fed to coconut leaves and palms under laboratory and field conditions. In healthy palms the absorption of phosphorus by roots and Us accumulation In spindle and first fully opened leaves was found to be significantly higher till 9lh hr as compared to that of diseased palms, but at later stages the reverse pattern was observed. The time required for 12P to reach the spindle (top-most leaf) situated at 9.5 m height In both diseased and healthy palm was found to be 3 hr only. In contrast to the leaves, the activity of P differed insignificantly in stem and roots of healthy and diseased palms and also the native P remained higher In the stem and roots of former palms as compared to latter. The analysis of total and different fractions of phosphorus and entry of P in the different forms of organic phosphorus indicated that although total P was more in the case of diseased palms but the organic phosphorus especially the nucleic acid P was significantly less as compared to healthy ones. This revealed less utilization of absorbed P in the synthesis of P-constituted organic substances in diseased palms.
Accumulation of phenolics in leaves of Areca palm affected with yellow leaf disease.
(2007-02-08) Srinivasan, N.
Accumulation of phenylpropanoid derivatives in chitosan-induced cell suspension culture of Cocos nucifera
(ScienceDirect, 2009) Moumita Chakraborty; Anitha Karun; Adinpunya Mitra
Accumulation pattern of oleoresin and related chemical constituents in black pepper (Piper nigrum) berries during growth and development
(2007-02-08) Mathai, C.K.
Activation of defense enzymes in arecanut (Areca catechu L.) seedlings upon inoculation with biocontrol agents
(2009) Kannan, S.; Jose, C.T.
Additional evidence of soil transmission of coconut root (wilt) pathogen
(2007-02-08) Shanta, P.; Gopinathan Pillay, N.; Lal, S.B.
A sap-transmissible pathogen resembling a virus is associated with the root (wilt) disease of coconut. This pathogen is soil borne. Cowpea plants became diseased when grown in infective soil, or in sterilized soil watered with infective leaf or root sap, or in soil to which infected roots were added. Treatment with pcntachloronitrobenzene destroyed infectivity. Air-drying for more than a week or fine grinding do not destroy infectivity. The pathogen perhaps is released through roots of infected plants. Soil water plays a major part in spread of the disease in nature.
Additional fungi associated with leaf rot disease of coconut in India (a research note)
(2007-02-08) Srinivasan, N.; Gunasekaran, M.
Additional hosts of the burrowing nematode, Radopholus similis, infesting coconut palm in South India
(2007-02-08) Sosamma, V.K.; Koshy, P.K.
The hoel atatua of twenty-four specie from sixteen plant families -was teated gainst RadophoJua acnilla. Adenanthera pavqai. Taaoar indue tedica, Vicia faba. Careya arborea, Lagenaru vulgarta, Cucurbita ptoo. Trichoeaathca anguxoa, Fieus reltgtoaa, and Phoeni* dactyUfera were recorded aa hoeta for R. jrunhis. Except for Cucurbita pepo. all are new boat record* for R, aim ilia.
Additions to the list of abnormalities in Arecanut
(1932) Shama Bhat . K
Adoption level of improved dairy farming practices by resource poor dairy farm households
(2024) Saurabh Pandey; Kuppusamy Ponnusamy; Keesam manasa
The level of adoption of improved dairy farming practices would reveal the interest and enthusiasm of any individual farmer. A study was carried out in Haryana to determine the degree to which the chosen resource poor dairy farmers have adopted improved dairy farming practices. The purpose of the study was to ascertain how resource-poor dairy farmers were implementing new techniques. It was established what degree of acceptance the four main facets of dairy farming-breeding, feeding, healthcare, and management practices-had by resource-poor dairy producers. In the years 2021-2022, the research was carried out in the districts of Karnal, Jind, and Jhajhar in the state of Haryana, which correspond to three distinct agroclimatic zones. This was followed by selection of cluster of villages in each district with the predominance of resource poor dairy households and then 40 respondents randomly from each cluster. Thus, study constituted a sample size of 120 respondents. Data were collected using structured interview schedule which was later analysed by using frequency, percentage and regression. The findings revealed that majority of the respondents had medium level of adoption of breeding practices (54.17%), feeding practices (60.00%) and healthcare practices (57.50%). Majority of respondents (65.00%) possessed medium level of adoption of management practices too. Most of respondents (47.50%) belonged to medium level of overall adoption of improved dairy farming practices. About 54.6 per cent variance on dependent variable is due to the independent variables taken for the study. This implies the need for undertaking intensive education of resource poor farmers along with facilitation of critical inputs for profitable dairy farming.
Adoption of Integrated Pest Management Strategies for Sustainable Production in Coconut
(2011-04) Nair, C.P.R.; Rajan, P.; Namboothiri, C.G.N.
Adulteration in Coconut and Virgin Coconut Oil : Implications and Detection Methods
(2019-11) Pandiselvam, R.; Manikantan, M.R.; Ramesh, S.V.; Shameena Beegum; Mathew, A.C
Adverse effect of neem oil on arecanut fruit setting
(2007-02-08) Vivek R. Bhat
Dakshina Kannada and Kasaragod coastal areca belt has Se^n^^iilmiA^-fbr adverse effect ofneem on arecanut production since 1997. Neem and similar planfBaseapesticides have been used as a prophylactic spray against scale infestation from the day of opening of areca spathe at regular intervals. This comes in the way of natural pollination which otherwise is wind mediated by - (i) making the male flowers not to open or dry up fast, (ii) aggravating the temperature effect and (Hi) mechanically blocking the entry of pollens into the receptive female flowers. An observatory study in the field and in the laboratory comprising three spray liquids viz., two unbranded but in vogue with the farmers (one neem based and the other cashew nut shell liquid based) and another Neemazal (10,000ppm Azadirachtin) from EID Parry (I) Ltd. at three concentrations in a CRD model, has confirmed the negative impact of these pesticides on arecanut pollination. Pollens deposited on the control agar media with no spray solution only germinated and hence thephyto-toxicity on the areca inflorescence is indicated.

Browse

Browsing Research Articles by Title

Results Per Page

Sort Options