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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 390 Documents
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Microbiological properties of root zone of coconut grown in different soil series in Sri Lanka K.S.K.S. Fernando; N.A. Tennakoon; S. Widanapathirana
International Coconut Community Journal Vol 20 No 1 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i01.378

Abstract

In Sri Lanka, coconut is cultivated under diverse soil conditions of varying fertility status available in different agro-climatic zones. Although chemical and physical characteristics in some of these soils are known, their biological properties are yet to be studied. Hence the aim of this study was to determine the microbiological parameters in root zone of coconut grown in different soil series. For this study, 20 different soil series in coconut growing area were analyzed for number of total bacterial and fungal colonies, identification of bacteria and fungi, biomass C and N; CO2 evolution and nitrogen mineralization. The microbiological parameters varied with the soil series. The bacterial population densities were significantly (p=0.001) high in Ambakelle, Kalpitiya, Rathupasa and Madampe soil series while the fungal colonies were significantly (p=0.001) high in Thambarawa, Pallama, Wilatawa and Ambakelle soil series.
INFLUENCE OF DRIP IRRIGATION ON 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 20 No 1 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i01.379

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.
MODELS OF TRAPS FOR THE COCONUT PESTS RHYNCOPHORUS BILINEATUS AND SCAPANES AUSTRALIS AND THEIR TRAPPING EFFICIENCY IN PAPUA NEW GUINEA Titus Kakul; Dr. S. Laup; Mr. R. N. B. Prior; Dr. Didier Rochat; Dr. Jean Paul Morin; P. Gende; S. Embupa; Dr. L. Ollivier
International Coconut Community Journal Vol 20 No 1 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i01.380

Abstract

The beetle pests Scapanes australis, Oryctes rhinocerous and Rhyncophorus bilineatus have been major constraints to coconut production in the Islands region of Papua New Guinea for the last 30 years. Efficient synthetic attractants able to lure and trap all three beetles have been developed. This paper describes several trap designs developed at the Cocoa and Coconut Research Institute and the results obtained for their trapping efficiency in the laboratory and the field. A modification of the “Titus Bucket” trap increased the number of R. bilineatus caught threefold and of female Scapanes twofold. PVC pipe traps caught more Scapanes than the modified “Titus Bucket” trap.
PRESENCE AND INOCULUM DENSITY OF Phytophthora IN DIFFERENT COCONUT CULTIVARS IN DAVAO RESEARCH CENTER (DRC) N.C.S.J. Bachiller
International Coconut Community Journal Vol 20 No 1 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i01.381

Abstract

Presence of Phytophthora palmivora was both obtained in the soil samples and organic debris layed in leaf axil of coconut. Block planted to CAMT x MRD hybrid had the highest number of Phytophthora propagules (2.0). This was followed by CAMT (1.4) and KINGD (1.1). Aromatic and Catigan Green Dwarf had the least Phytopthora propagules collected. Isolation of Phytophthora from the soil samples and organic debris from leaf axil was done thru dilution plate and baiting method respectively using six month old Malayan Red Dwarf (MRD) nuts. Highest infection (100%) on bait nuts was also obtained in CAMT x MRD hybrid 3.5 days after inoculation. Reisolation of Phytophthora from bait nuts gave positive results. Morphological characterization of the sporangium showed considerable variation in shapes and size. More Phytophthora propagules was obtained in soil samples collected in areas previously planted with Malayan Yellow Dwarf x West African Tall (MAWA). Phytophthora palmivora is basically a soil borne pathogen but could easily be transported by wind and rainsplash, tent building ants and flying beetles,.
NEW WAY OF CONTROLLING Oryctes monoceros (COLEOPTERA, DYNASTIDAE), A COCONUT PEST IN GHANA René Philippe; S.K. Dery
International Coconut Community Journal Vol 20 No 1 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i01.382

Abstract

Oryctes monoceros is one of the most dangerous pests in young coconut and oil palm plantings throughout West Africa. This species is controlled using different methods that can be applied in combination as part of IPM. The first naturally involves eliminating all larva sites, consisting of dead or felled coconut or oil palm stems. Rapidly covering felled stems with a cover crop can keep the populations of this pest down to a very low level. When adults attack, frequent monitoring of young plantings is recommended, as is the removal of adults from their galleries using a metal mini-harpoon. Chemical control with Lambda-Cyhalothrin reduces damage to seedlings, particularly as that product has good repellent properties. It remains effective for around a month. Physical control has been developed, using old fishing nets rolled into balls and inserted in the axils of young fronds. This method is highly effective, cheaper than other types of control, does not pollute and is not toxic for handlers. Adults trapped by the rolled up fishing nets, which eventually die, attract other adults that are trapped in turn, thereby increasing the efficiency of the method.
PHEROMONE SYNERGISTS AS CO-ATTRACTANT FOR OLFACTORY TRAPPING OF SCAPANES AUSTRALIS BSDV. (COLEOPTERA: SCARABAEIDAE) PEST OF COCONUT IN PAPUA NEW GUINEA Titus Kakul; Didier Rochat; Jean Paul Morin; P. Gende; S. Embupa; L. Ollivier
International Coconut Community Journal Vol 20 No 1 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i01.383

Abstract

Olfactory trapping of Scapanes australis is being studied to develop it to complement existing control methods. Components required were traps, pheromone and pheromone synergist. The first two have been developed while field trials carried out to determine an efficient synergist co-attractant is reported. Synthetic synergist mixtures of compounds emitted from fermenting sugarcane were tested in comparison to split stalk of garden grown sugarcane and split bulb of nursery coconut. Some of the mixtures produced synergistic effect similar to sugarcane but lower than split bulb of coconut. Placing live Scapanes adult inside the stalk of sugarcane increased catches similar to the split bulb of coconut. This will enable the formulation of an efficient tool of beetle control.
Phytoplasma diseases of coconut in India - root (wilt) and tatipaka diseases J.J. Solomon; L. Geetha
International Coconut Community Journal Vol 20 No 1 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i01.384

Abstract

Root (wilt) and Tatipaka diseases in India are caused by phytoplasma. Lethal yellowing disease in Caribbean region, Lethal yellowing like disease in west and east Africa and Coconut stem necrosis.in Sumatra and Peninsular Malaysia are phytoplasma induced diseases of coconut in other continents. Root wilt disease in India was first reported from Kerala in 1874.Tatipaka disease was first noticed in Andhra Pradesh after the 1949 cyclone. The progress made on various aspects including history, nature of spread, description of external & internal symptoms, etiology abiotic factors, biotic agents implicated in transmission of disease, culturing, chemotherapy, screening of coconut germplasm, breeding for disease resistance/tolerance and disease management is detailed.
PRESENCE AND INOCULUM DENSITY OF Phytophthora IN, DIFFERENT COCONUT CULTIVARS IN DAVAO, PHILIPPINES N.C.S.J. Bachiller
International Coconut Community Journal Vol 20 No 1 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i01.385

Abstract

Phytophthora palmivora was present in the soil samples and organic debris deposited in leaf axil of coconut. Block planted with CAMT x MRD hybrid had the highest number of Phytophthora propagules (2.0) followed by CAMT (1.4) and KINGD (1.1). Aromatic and Catigan Green Dwarf had the least Phytopthora propagules. Isolation of Phytophthora from the soil samples and organic debris from leaf axil was done through dilution plate and baiting method respectively using six month old Malayan Red Dwarf (MRD) nuts. Highest infection (100%) on bait nuts was also obtained in CAMT x MRD hybrid 3.5 days after inoculation. Reisolation of Phytophthora from bait nuts gave positive results. Morphological characterization of the sporangium showed considerable variation in shapes and size. More Phytophthora propagules was obtained in soil samples collected in areas previously planted with Malayan Yellow Dwarf x West African Tall (MAWA). Phytophthora palmivora is basically a soil borne pathogen but could easily be transported by wind and rainsplash, tent building ants and flying beetles.
Distribution and progression of stem bleeding disease of coconut (Cocos nucifera L.) in some areas of the Philippines Nemesia C. San Juan; Bachiller; Reynaldo G. Abad
International Coconut Community Journal Vol 20 No 2 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i02.386

Abstract

Records of disease occurrence in surveyed provinces show Davao del Sur having the highest disease incidence of stem bleeding caused by Thielaviopsis paradoxa (de Seynes) von Hohnel. Disease incidence in Malayan Yellow Dwarf x West African Tall (MYD x WAT) hybrid at the PCA’s Zamboanga Research Center was relatively lower than the other areas observed. Tall genotypes are less susceptible to the disease as shown in the province of Quezon where the cultivar Laguna Tall is predominantly grown. The incidence of stem bleeding was found to be related with palms age. More incidence of the disease was noted in palms between 11-15 years old. Study on the spatial distribution of the disease from l991 to l995 show that the disease initially occurred in random foci, and, subsequently infected adjacent palms. The disease progress curves suggest that stem bleeding follows a sigmoid curve. It follows that the progress of the disease at any given time is a function of the initial inoculums and the number of effective contact points between susceptible host and inoculums per unit time. Analysis of the infection rates using logistic growth model showed that the rate of disease increase ranged from 0.029 to 0.218 per unit per year and 0.227 per unit per year in all the six experimental areas. Increase in disease incidence is directly related to high amount of rainfall.
Effects of chlorine and potassium mineral nutrition on the leaf morphology of the PB 121 hybrid coconut palm (Malayan Yellow Dwarf x West African Tall) I. Mialet-Serra; X. Bonneau
International Coconut Community Journal Vol 20 No 2 (2004): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v20i02.387

Abstract

The effects of chlorine and potassium on the leaf morphology of 6-year-old PB 121 hybrid coconut palms were studied in 1995 and 1996 in southern Lampung (South Sumatra, Indonesia). The parameters considered were frond and leaflet size (length, maximum width, area) and their number. Chlorine and potassium had an exclusive effect on leaflet size, increasing their area. Potassium primarily affected petiole length, hence total frond length. Synergy between these two ions only occurred for the number of leaflets. Chlorine and potassium acted independently on stem diameter and synergistically on height. Coconut palms receiving potassium or chlorine had significantly more voluminous leaf crowns. As time went by, this phenomenon increased despite constant monthly leaf emission. In a situation of equilibrium, the much larger mean crown area and leaf area index of coconuts receiving chlorine and potassium augured well for an earlier start to bearing and higher nut yields.

Page 19 of 39 | Total Record : 390

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