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Mufid Febrianto
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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
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Search results for , issue "Vol 18 No 01 (2002): CORD" : 4 Documents clear
ELECTRON MICROSCOPIC EVIDENCE FOR PURIFICATION OF COCONUT ROOT (WILT) DISEASE PHYTOPLASMA M. Mayilvaganan; J. J. Solomon
International Coconut Community Journal Vol 18 No 01 (2002): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v18i01.353

Abstract

Root (wilt) disease phytoplasma was purified from diseased coconut tissues using discontinuous Percoll gradient centrifugation method. Crude sap prepared from coconut was layered on a discontinuous Percoll gradient of 15, 30, 50 and 60%(v/v). After centrifugation at 20,000 g for 30 min, the turbid fraction formed on the top of 30% gradient in the diseased plant material was recovered, processed and fixed for electron microscopy. Electron microscopic examination of sections prepared from purified preparation of diseased plant material showed typical cells of root (wilt) phytoplasma with heterogeneous sizes and more or less spherical shape that are similar to those found in sieve elements of diseased tissues and salivary glands of infective (viruliforms) insect vectors. These purified phytoplasma bodies showed trilaminar membrane with internal materials of ribosome granules and DNA fibrils. However, the yield in terms of number of cells was fewer and in addition to intact bodies, free membranes and empty bodies lacking internal contents also were observed.
EXTENT OF DAMAGE TO COCONUT PALMS CAUSED BY SUPER CYCLONE IN ORISSA AND PATTERN OF THEIR RECOVERY D.K. Dash; D.P. Ray; H. Hameed Khan
International Coconut Community Journal Vol 18 No 01 (2002): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v18i01.354

Abstract

During the Super cyclone (October, 1999) in the coastal districts of Orissa, 26,836 hectares of coconut garden having 46,96,300 palms were severely affected. A survey of affected palms in the selected villages classified the palms as (i) uprooted (11.3 percent) (ii) palms with complete crown damage (23.3 percent) (iii) palms with severe damage to the crown (32 percent) and (iv) palms with partial crown damage (34 percent). The affected palms lost most of their valuable leaves and spadices in their varying stages of development. The recovery of palms started after 2 months of damage in the form of production of new leaves. The spadices production started after 4-5 months of damage. The number of palms entered the fresh reproductive stage is of low percent, which may lead to in 2-3 years delay in nut production by the palm. Regular manuring with organics and inorganics, adequate plant protection are suggested to rejuvenate the palms.
PERFORMANCE OF SELECTED COCONUT VARIETIES/ HYBRIDS UNDER SEQUENTIAL COCONUT TODDY AND NUT PRODUCTION SCHEME OR SCTNP M.I. Secretaria; R.M. Ebuna; S.S. Magat; J.N. Maravilla; G.A. Santos; G.B. Baylon
International Coconut Community Journal Vol 18 No 01 (2002): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v18i01.355

Abstract

The response to sequential coconut toddy and nut production (SCTNP) scheme of four coconut varieties/hybrids at PCA-Zamboanga Research Center, San Ramon, Zamboanga City showed that the dwarf x tall hybrids, Malayan red dwarf x Baybay tall (MRD x BAYT), Malayan red dwarf x Tagnanan tall (MRD x TAGT) and Catigan green dwarf x Laguna tall (CATD x LAGT) produced significantly higher toddy (495 – 699 li/tree/yr) and nut yield (143-169 nuts/tree/yr) compared to tall cultivar, ‘Laguna’ LAGT (364 li and 123 nuts per tree per year). Varietal difference in terms of the floral and vegetative characteristics of the coconut cultivar and hybrids contributed significantly to the differences in the sap/toddy and nut yields.
USEFULNESS OF EARLY DIAGNOSTIC METHODS FOR EFFECTIVE MANAGEMENT OF BASAL STEM ROT (GANODERMA) DISEASE OF COCONUT A. Karthikeyan; S. Mohan; R. Bhaskaran
International Coconut Community Journal Vol 18 No 01 (2002): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v18i01.356

Abstract

Chemodiagnostic methos EDTA and TTC tests and physiological parameters electrical conductivity and relative water content are useful to detect the basal stem rot disease in coconut palms, 4 - 14 months before visual symptom expression. The critical values of these tests for symptom expression have been fixed. In coconut trees, root sampling from any directions at 15 - 30 cm depth is optimum for early detection tests. Coconut palms without symptoms but showing higher values in diagnostic tests responded well to treatments by registering lesser disease index and higher nut yield than the treated palms with external symptoms.

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