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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 4 Documents
 1 
Search results for , issue "Vol 14 No 01 (1998): CORD" : 4 Documents clear
BIOTYPICAL VARIABILITY AMONG FOUR POPULATIONS OF RED PALM WEEVIL RHYNCHOPHORUS FERRUGIAEUS FAB/OLIV. FROM DIFFERENT PARTS OF INDIA C.P. Ramachandran
International Coconut Community Journal Vol 14 No 01 (1998): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v14i01.313

Abstract

The red palm weevil rhpichophorus ferrugineus FAB/OLIV is a very serious and dreaded pest of coconut, date and other palms. Being an internal feeder the weevil incidence is detected at a very late stage when the tree has succumbed to weevil attack. Hence conventional control operations may not be very effective. The biotypical variability of the four populations collected from different parts of India showed that the populations are genetically different and strainal variability exists between them. Variations in sex ratio and deleterious genetic effect were observed in the crosses and reciprocal crosses. The weevil has a very high fitness due to high production potential and the absence of effective parasites, predators and pathogens. In spite of the high fitness, in endemic areas weevil population tend to remain at certain levels of intensity. This may be due to certain limiting factors.
ON THE COMMON ORIGIN OF SOUTHEAST ASIA OF PHYTOPLASMA ASSOCIATED DISEASES OF COCONUT Hugh C Harries
International Coconut Community Journal Vol 14 No 01 (1998): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v14i01.314

Abstract

The association of phytoplasma with two wilt diseases of coconut in Indonesia might be seen as a threat to the Asian and Pacific regions because epidemic phytoplasma diseases of coconut in America and Africa arc spreading out of control. Yet research has already suggested that these diseases originated in the Far East where resist varieties can bc found. Recently, a workshop was held to assess lethal diseases of coconuts caused by phytoplasmas and their importance in southeast Asia. The workshop took place in Manado, North Sulawesi , Indonesia on 16‑17 February 1998 and the full proceedings will be published separately. The participants beard about the situation of coconut development and the unpact of etiology of coconut wilt diseases in Indonesia. As 95% of coconuts in Indonesia are grown by small farmers the workshop was also informed of the impact of coconut diseases on small farmers. Specific reports were made on the history and status of Natuna wilt disease and the distribution of epiderniology of Kahmantan wilt diseasc. These have both been associated writh phytoplasma. Other reports were made on the development of coconut wilt discase in Kotawaringin, Timur District, Central Kalimantan Province and on the history and status of yellow disease of coconut palm in Central Sulawesi, for which no causal agents have yet been identified. Intemational representatives also spoke about root (wilt) and Tatipakka diseases of coconut in India and declffie diseases of coconut in Sri Lanka that have not been associated with phytoplasma and on lethal diseases in America and Africa that arc associated with phytoplasma. The history and biology of phytoplasmas as plant pathogens and diagnostic methods for coconut diseases; were explained in a session on the pathogen. Safe germplasm movernent for scientific purposes of conservation and exchange was dealt with and, for fanners and extension agents, the practical application of resistant local coconut varieties for replanting was advised.
STUDIES ON PESTS IN 4 COCONUT CULTIVARS IN LAMPUNG PROVINCE Wily A. Baringbing; Bariyah Baringbing
International Coconut Community Journal Vol 14 No 01 (1998): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v14i01.315

Abstract

A three‑year field study to investigate species of pests on four (4) coconut cultivars: PB‑1 21, PB‑111, KH17VA‑1 and dwarf Salak, was carried out in Lampung province involving 11 visits from November 1991 to April 1993. Only two regencies: Lampung Utara and Lampung Tengah with 3 and l sub‑districts, respectively were surveyed But only three sub‑districts of Lampung Utara: Sungkai Selatan, Manggala and Mesuji and only Terbanggi Besar in Lampung Tengah were studied Observations of Brontispa longissima Gestro, Plesispa reichei Chapuis, Oryctes rhinoceros Linnaeus, Xylotropus Gideon (Linnaeus), Rhynchophorus vulneratus (Panzer), and the others were studied. Results of the study showed that no cultivars were resistant to any species of pests in Lampung province. There were 19 species of pests, 2 of which do not belong to the insect present in the 2 regencies. The 17 species of insects belong to 4 orders including: Coleoptera, Lepidoptera, Homoptera and Orthoptera in 3, 5, 1 and l families, respectively.
THE PROBABLE ORIGIN OF LETHAL YELLOWING AND ITS CO¬-IDENTITY WITH OTHER LETHAL DISEASE OF COCONUT L. Chiarappa
International Coconut Community Journal Vol 14 No 01 (1998): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v14i01.316

Abstract

The working hypothesis is put forward that Lethal Yellowing (LY) disease of coconut originated in Southeast Asia, where the disease is now endemic due to the prevalence of locally resistant to moderately resistant varieties. The suggestion is made that LY is co‑identical with other lethal diseases of coconut characterized by different symptorn expression. These differences are due to certain morphological and physiological characteristics inherent in coconut 'groups' of different origin. A hypothesis is also advanced on the existence of different strains of LY, which would explain the differences in susceptibility of certain varieties when grown in different locations. The need for coordinated research to confirm or reject these hypotheses is discussed.

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