Red Ring Disease of Cocos Nucifera L. Caused by Rhadinaphelenchus Cocophilus (Cobb, 1919) Goodey, 1960
Author: C. G. Dean
Publisher:
Published: 1979
Total Pages: 76
ISBN-13:
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Author: C. G. Dean
Publisher:
Published: 1979
Total Pages: 76
ISBN-13:
DOWNLOAD EBOOKAuthor: Gaston Percival Blair
Publisher:
Published: 1963
Total Pages: 210
ISBN-13:
DOWNLOAD EBOOKRhadinaphelenchus cocophilus incited red ring disease when inoculated artificially into stem, leaves, or roots of coconut pains between 3-10 years old. Inoculation was effected by inserting fragments of diseases tissue or a water suspension of the nematode into holes made in the tree at the sites mentioned above. Nematodes also penetrated intact tissue of leaf axils, petioles and roots. External symptoms appeared 40-70 days after inoculation and trees were dead in six to eight weeks after symptoms first appeared. The coconut does not become naturally infested but green nuts were successfully infested artificially both on trees and in the laboratory. The epicarp of infested nuts became brown, hard and shrivelled. The mesocarp became reddish brown and containedliving nematodes. The nematodes did not pass from infested to healthy nuts through the fruit stalk. R. cocophilus is found intercellularly and intracellularly in the ground parenchyma of infested tissue. Some cells disintegrate forming cavities in which nematodes are abundant. Many of the cells in the infested tissue lose their contents. The nematodes tend to migrate to areas with living cells. Adults and eggs are in greater numbers in the crown region of trees where lesions terminate in elongate streaks and dots of orange colored tissue. Nematodes do not invade xylem vessels nor damage them directy. However, the vessels which pass through the discolored areas become occluded with tyloses and as result the water conducting system of infested trees become...
Author: V. Krishnakumar
Publisher: Springer
Published: 2019-02-15
Total Pages: 850
ISBN-13: 9811327548
DOWNLOAD EBOOKSince the publication of "The coconut palm - A monograph" in 1960, considerable information has been accrued on the crop through work at research institutes, international organisations and development agencies. Although coconut cultivation is spread over 93 countries, providing employment and creating livelihood opportunities to 64 million families around the globe, smallholder coconut farmers are now facing numerous challenges. The wide gap between the potential and actual yield is a major concern, and as such it is necessary to disseminate knowledge in order to implement research findings. Coconut research in India, one of the leading coconut producing countries, is celebrating its centenary, making this an opportune time to review the research and development advances and the relevant technologies. This detailed, comprehensive book covers all aspects of coconut, from the origins to cultivation, breeding, physiology and value addition, as well as subjects of topical interest like nutrition and health, biotechnology, and climate change and carbon sequestration. Written by leading experts in the fields it emphasises that the livelihood of the small coconut landholders is the ultimate aim of scientists and developmental agencies, and outlines various important strategies to make coconut farming more remunerative globally. It discusses work in all the major coconut growing countries and outlines suggestions for international cooperation. Research work on the crop is comparatively difficult because of its perennial nature, longevity, height, long juvenile phase, large sized nuts, cross pollination and seed propagation. As these special features necessitate greater investment of resources, time and land, it is all the more imperative that research is not duplicated and the information and experience becoming available around the world is shared so that it can be fully utilised. In this context periodic publications, compiling all the available information on coconut assume greater significance. This book is therefore of great value to researchers, students, extension workers, developmental agencies and progressive farmers.
Author: Randy C. Ploetz
Publisher: CABI
Published: 2003
Total Pages: 592
ISBN-13: 9780851999753
DOWNLOAD EBOOKAnnotation. Comprehensive information on diseases of the most important tropical fruit cropsChapters are devoted to a single or, in some cases, a related group of host plantsThe history, distribution, importance, symptoms, aetiology, epidemiology and management of diseases of each crop are described in detailThis book offers a comprehensive review of diseases of important tropical and some subtropical fruit crops. The history, distribution, importance, etiology, epidemiology and control of diseases of each host crop are covered, along with brief summaries on the taxonomy, origins and characteristics of each host. Additional information is given on the biology and pathology of the causal agents and on new advances that change or otherwise enhance our understanding of the nature and cause of these diseases. Plant pathologists, plantation and nursery managers, lecturers and those who are involved in tropical agriculture and horticulture will find this an essential reference.
Author: William R. Nickle
Publisher: CRC Press
Published: 2020-12-17
Total Pages: 1064
ISBN-13: 1000147711
DOWNLOAD EBOOKNickle (Beltsille Agricultural Research Center of the USDA) has engaged 29 internationally known experts to replace the classic work of I.N. Filipjev (1934) and its translated revision (Schuurmans Stekhoven, Jr., 1941) with a modern work taking note of 188 additional genera, and 4,650 more species.
Author: Food and Agriculture Organization of the United Nations
Publisher: Bioversity International
Published: 1993
Total Pages: 48
ISBN-13: 9290431563
DOWNLOAD EBOOKAuthor: Richard A Sikora
Publisher: CABI
Published: 2018-08-10
Total Pages: 901
ISBN-13: 1786391244
DOWNLOAD EBOOKCovering all aspects of practical plant nematology in subtropical and tropical agriculture, the third edition of this definitive global reference work is fully revised and in full colour throughout. It covers the presence, distribution, symptomology and management of all economically important plant parasitic nematodes damaging the world's major food and cash crops. This includes: rice, cereals, solanum and sweet potatoes (and other root and tuber crops), food legumes, vegetables, peanut, citrus, fruit tree crops, coconut and other palms, coffee, cocoa, tea, bananas, sugarcane, tobacco, pineapple, cotton, other tropical fibres, spices and medicinal plants. New content for this edition includes: A chapter on nematode soil biodiversity and soil health; Reflections on the future impact of nematodes and nematology on food security; The importance of climate change, emerging threats, and new management technologies for large and small subsistence growers; Significant revisions to the IPM chapter and chapters on vegetables, citrus, legumes, tuber crops, cotton, peanut and banana where major advances in nematode management have occurred. This book is highly illustrated, with up-to-date practical guidance on methods of extraction, processing and diagnosing of different plant and soil nematodes and on integrated pest management. It remains an invaluable resource for those studying and working in the area of crop protection.
Author: William Mai
Publisher: Cornell University Press
Published: 2018-09-05
Total Pages: 288
ISBN-13: 1501728415
DOWNLOAD EBOOKFormerly titled Plant-Parasitic Nematodes: A Pictorial Key to Genera, this volume has been the standard work on plant disease around the globe. Now in its fifth edition, it remains the fundamental reference for students as well as for diagnosticians—a usable, comprehensive key to plant-parasitic nematodes and the only guide to feature both photographs and drawings. Accompanied by full-page plates, the book offers descriptions of 68 genera, including most that have one or more species known to be plant parasites. The bibliography of approximately 2,500 entries on the taxonomy and morphology of nematode genera is one of the fullest on this subject. For the present edition, the authors have made revisions throughout and have added references to more than two hundred genera not previously included. An updated taxonomy, glossary, and an index are also provided. William F. Mai is Liberty Hyde Bailey Emeritus professor, Peter G. Mullin is Coordinator of Laboratory Instruction, and Howard H. Lyon is Biological Photographer (retired) in the Department of Plant Pathology, Cornell University.
Author:
Publisher:
Published: 1981
Total Pages: 574
ISBN-13:
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