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CORD
Published by International Coconut Community
ISSN : 02151162     EISSN : 27218856     DOI : 10.37833/cord
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Library & Information Science
Aims CORD aims to publish original research results and reviews on research and development. While encouraging those involved in research and developments to disseminate their finding it also assists policy makers and planners to be aware of the latest developments in the sector Scope CORD encompasses a broad range of research topics in animal sciences: seedlings and genetics, farming, harvesting, production, health, biotechnology, and production, socio-economic, and policy.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 509 Documents
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Curative and Prophylactic Control of Fungal Leaf Rot Complex in Root (Wilt) Affected Coconut Palms in India N. Srinivasan; M. Gunasekaran
International Coconut Community Journal Vol 19 No 01 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i01.365

Abstract

Root wilt disease (RWD) is a debilitating malady of coconut in India that is caused by phytoplasma. In RWD affected palms, leaf rot disease (LRD) is commonly superimposed. The LRD is due to fungi and this leaf rot phase forms an integral part of RWD complex. Control of LRD is important as it severely disfigures the palm and brings about rapid deterioration in its health and productivity. Control trial involving Phytosanitation of young leaves, pouring of broad spectrum - systemic fungicide, Contaf 5 E (Hexaconazole 5% EC) into the axil of spindle leaf besides a number of other measures was conducted to study their ameliorating effect on LRD. Prophylactic control trial, especially with the broad-spectrum fungicides was also conducted. Pouring of Contaf into the axil of spindles along with phytosanitory measures on the spindle and other young leaves significantly reduced the incidence of LRD in newly emerging spindles effecting cure. Application of the fungicide on RWD palms prior to the onset of LRD, offered prophylactic protection to emerging leaves against LRD. Relevance of practising integrated control measures, cure of LRD at an early stage itself, the need for strict adoption of crop management technology etc. for effective disease control are highlighted here.
Design and Analysis of Coconut Embryo Culture Experiments Anitha Karun; K. Muralidharan; K. K. Sajini; V. A. Parthasarathy
International Coconut Community Journal Vol 19 No 01 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i01.366

Abstract

The experimental design and data analysis procedures followed for standardizing the CPCRI protocol of coconut zygotic embryo culture are described. The availability of human resources (for initiating the cultures as well as periodic sub-culturing), laboratory space for maintaining culture, infrastructure for preparation of adequate culture media etc, are the important factors to be considered at the planning stage. Since the response of interest per experimental unit is discrete (germinated or not), it is desired to have a “plot size” of 20. Based on the experimental errors obtained for various treatments, attempts were made to obtain the replication size for a specified value of treatment difference to be tested. In most of the experiments, per cent germination was not following the assumption of ANOVA , even after transformation. In such situation, the chi-square test was employed to study the influence of treatments on germination. The coefficient of variation in most of the experiments was below 20 %.
Farmers' Perceptions on Expansion of A New Technology: The Case of Coconut-Based Intercropping in Sri Lanka M. T. N. Fernando; M. E. Daw; I. E. Edwards
International Coconut Community Journal Vol 19 No 01 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i01.367

Abstract

Monocropping, the widely practiced traditional coconut cultivation system in Sri Lanka, utilizes bio-physical resources sub optimally, generating low returns to growers than its potential under an intensive cultivation alternative, coconut-based intercropping (CBI). Despite concerted efforts of successive governments, the adoption of CBI systems by farmers is low. This study investigates the farmers' perceptions of CBI on the premise that the understanding of farmers’ perceptions of a new technology is important to identify the causes for the low adoption of that technology. Data were gathered by a field survey of 113 and 37 intercroppers and monocroppers respectively, in three main coconut-growing districts, namely Kurunegala, Gampaha and Puttalam, using a structured questionnaire supplemented with open-ended questions, through a single visit. Percentage analysis supplemented with a simple scoring device was employed to analyze the farmer's perceptions of CBI. Intercroppers objectives of intercropping, the constraints they face in expanding intercropping, reasons for non-adoption of CBI by present monocroppers and the suggestions of present intercroppers to further expand the CBI, all in the order of importance, are presented.
Important Biocontrol Traits of Microbial Antagonists of Leaf Rot Disease of Coconut Alka Gupta
International Coconut Community Journal Vol 19 No 01 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i01.368

Abstract

Leaf rot disease of coconut, which occurs superimposed on root (wilt) disease of coconut in about 65 % of the cases, is an important disease prevalent in Kerala State of India. Colletotrichum gloeosporioides and Exserohilum rostratum are the main fungal pathogens of the disease, which disfigure the leaves and reduce yield substantially. Several biocontrol agents have been identified which reduce the disease development by these fungal pathogens. Pseudomonas spp. exhibit a host of mechanisms, which act in concert to bring about biocontrol activity. Bacillus spp. work mainly through production of antibiotics and other non-volatile metabolites. Mycoparasitism was the main contributing factor for actinomycetes group.
Incidence of Root (Wilt) Disease in Various Cross Combinations of West Coast Tall Variety of Coconut R. V. Nair; P.M. Jacob; M. G. Rajesh; R. J. Thomas
International Coconut Community Journal Vol 19 No 01 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i01.369

Abstract

Root (wilt) disease is a very serious disease of coconut in eight southern districts of Kerala, India. A comprehensive breeding programme – the only practical solution for the management of the disease – was started at Central Plantation Crops Research Institute (CPCRI), Kayangulam during 1987. Coconut seedlings, belonging to five cross combinations with WCT viz. WCT (Inter se), West Coast Tall (WCT) (Self), WCT (Mixed Pollen), Chowghat Green Dwarf (CGD) x WCT and WCT (Open Pollinated) were studied for their incidence of root (wilt) disease. All the seedlings were planted during 1992 except CGD x WCT which was planted during 1991. In the absence of a mass screening technique under artificial conditions, assessment of resistance was based on natural infection. The progenies belonging to various cross combinations of WCT x WCT showed significant variability for incidence of root (wilt) disease. Observations, recorded during September 2002, revealed that the incidence of root (wilt) varied from 53.4 to 55.2 % in WCT x WCT crosses whereas CGD x WCT had 64.5 %. Open pollinated seedlings from healthy mother palms contracted 70 % incidence of the disease. The studies showed superiority of artificially pollinated seedlings (full sibs) over the open pollinated seedlings (half sibs) with regard to their susceptibility to the disease.
Investigation of the Feasibility of Constructing A Map for Coconut with Several F2 Families Using Computer-Simulated Data C. K. Bandaranayake
International Coconut Community Journal Vol 19 No 01 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i01.370

Abstract

A computer simulation was performed using RiceSim computer software to explore the practicability of combining several different F2 populations together through JoinMap to mimic the real available coconut mapping populations, and found that it was very successful. JoinMap would be able to map all 16 chromosomes which covered the map length of 1540 cM except for a single marker on chromosome 8. The largest marker interval was 32 cM at the bottom of chromosome 3 and all other markers were evenly distributed along the chromosomes maintaining the space around 12-30 cM between them.
Influence of Drip Irrigation of Growth and Yield of COD x WCT Coconut (Cocos nucifera L.) Hybrid R. Dhanapal; H. P. Maheswarappa; P. Subramanian; Ajay Kumar Upadhyay
International Coconut Community Journal Vol 19 No 02 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i02.373

Abstract

A field experiment on drip irrigation for Chowghat Orange Dwarf X West Coast Tall (COD X WCT) coconut hybrid was conducted in laterite soil at Central Plantation Crops Research Institute, Kasaragod (Kerala, India) to study the drip irrigation requirement and its influence on growth and yield. The treatments included were three levels of drip irrigation (at 33, 66 and 100% E0 daily), basin irrigation (100% E0) and rainfed control. The experimental results revealed that annual leaf production and leaf nutrient status of coconut palm was significantly higher in the irrigated treatments compared to the rainfed control. The female flower production and nut yield with 66 per cent of Eo was on par with 100 per cent of Eo through drip and 100 per cent of Eo through basin irrigation and significantly superior compared to drip irrigation at 33 per cent of E0 and rainfed control. Drip irrigation equal to 66 per cent of open pan evaporation (Eo) proved to be the economically efficient method of irrigation with water saving of 34 per cent compared to 100 per cent of Eo through basin and drip method.
Long-Term Coconut Leaf Pruning (CLP) Effects on CBFS: Coconut-Coffee Agroecosystem L. H. Canja; S. S. Magat; R. Z. Margate
International Coconut Community Journal Vol 19 No 02 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i02.374

Abstract

A long-term study on the response of ‘Laguna’ tall (LAGT) palms and coffee intercrop to coconut leaf pruning (CLP) was conducted at the PCA-Davao Research Center from 1993 to 2001 to determine the effect of coconut leaf pruning on the productivity of coconut + coffee cropping system. The coconut leaf pruning technique did not significantly affect the yield and nutrition of coconut in all the years of observation. However, lower number of nut and weight of copra per tree were observed on palms with CLP than those without CLP, but with a slight improvement in copra weight per nut. Likewise, CLP did not affect the coffee yield and leaf nutrient levels. Among the coffee varieties tested, the Excelsa had the highest green bean yield. The Robusta (Ivory Coast and Philippine strains) and Arabica had similar yield and crop nutritional status. While they had similar leaf N, K and B contents that were higher than that of Excelsa, they also had lower leaf levels of Ca, Cl and S. Coffee needs, 1,000-3,000 foot-candles of sunlight, which is within the available light transmission (1,750-4,050 foot-candles) under palms with and without CLP. Hence, CLP is not necessary anymore in coconut with coffee intercrop.
Functional properties and physicochemical characteristics of coconut poonac (oil cake) protein isolate: Functional properties of coconut poonac protein isolate B. C. Prabhashi; K. D. Prasanna P. Gunathilake
International Coconut Community Journal Vol 42 (2026): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v42i.503

Abstract

Coconut poonac is a protein-rich, low-cost by-product of coconut oil extraction. Hence, an effort is needed to identify the potential applications of coconut poonac as a source of plant protein. This study characterized the functional properties and physicochemical characteristics of coconut poonac protein isolate (CPPI) and the results were compared with soy protein isolate (SPI). The protein content of soybeans (33.94%) was significantly higher (p<0.05) than that of coconut poonac (17.73%). The protein content in CPPI and SPI were found to be 68.64% and 79.58%, respectively. Significantly higher (p<0.05) oil absorption capacity, water absorption capacity, emulsion activity, emulsion stability, and foaming capacity were observed in CPPI. According to the results, CPPI has good functional properties which can be explored as a source of plant-based alternative protein for food applications, especially in the development of meat alternatives.

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