African cassava mosaic disease and its control.

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Published by Technical Centre for Agricultural and Rural Cooperation in Wageningen-Ede, The Netherlands .

Written in English

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  • Cassava mosaic disease -- Congresses.

Edition Notes

Book details

Other titlesInternational Seminar on African Cassava Mosaic Disease and Its Control.
ContributionsTechnical Centre for Agricultural and Rural Cooperation (Ede, Netherlands), International Seminar on African Cassava Mosaic Disease and Its Control (1987 : Yamoussoukro, Côte d"Ivoire)
Classifications
LC ClassificationsSB608.C33 A36 1987
The Physical Object
Paginationiii, 301 p. :
Number of Pages301
ID Numbers
Open LibraryOL1170625M
LC Control Number94153325

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African cassava mosaic disease and its control Guthrie, E.J. General summary of national reports Godo, G. African cassava mosaic in the Congo Massala, R. Impact of African cassava mosaic on the growth and yield of cassava Fauquet, C.

et al Strategies for controlling African cassava mosaic virus Thresh, J.M. SESSION B - THE FACTORSFile Size: 5MB. Cassava plant affected by an ‘unusual’ form of cassava mosaic disease (CMD) showing characteristic ‘candle stick’ symptoms as a result of infection by a recombinant cassava mosaic begomovirus known as East African cassava mosaic virus-Uganda (EACMV-UG).

The African cassava mosaic disease and its control. book pandemic that occurred in East Africa during the s was caused by EACMV. African Cassava Mosaic Virus: Etiology, Epidemiology, and Control Cassava (Munihor escuknra CrantE; Euphorbiaceae) is the only species in its genus that is cultivated as a food crop.

In South America, where it originated. cassava was domesticated 2, years B.c., yet only recently has it become distributed worldwide. The PortugueseFile Size: 2MB. D.V.R. Reddy, G. Thottappilly, in Advances in Virus Research, 2.

Cassava mosaic disease. Cassava mosaic disease is a major constraint for cassava cultivation throughout Africa and in the Indian subcontinent. In Africa and its adjacent islands (Fauquet and Fargette, ; Thottappilly et al., ; Thresh and Fargette, ), seven geminiviruses, African cassava mosaic virus (ACMV.

African cassava mosaic virus. African cassava mosaic virus (ACMV) Cassava mosaic disease is a major constraint for cassava cultivation throughout Africa and in the Indian subcontinent. In Africa and its adjacent islands BRET COOPER, in Handbook of Biological Control, La Mosaïque africaine du manioc et son contrôle: Actes du séminaire = African cassava mosaic disease and its control: proceedings: Yamoussoukro Colloques et séminaires) (French Edition) on *FREE* shipping on qualifying offers.

Notes on Taxonomy and Nomenclature Top of page. African cassava mosaic virus (ACMV) is a member of the genus Begomovirus in the family was the first of 10 recognized and one tentative begomovirus species characterized from cassava plants affected by.

Notes on Taxonomy and Nomenclature Top of page. Cassava mosaic disease (CMD) Cassava mosaic disease in Africa and the Indian subcontinent is caused by one, or a mixture, of the 10 definitive and one tentative species of distinct cassava mosaic geminiviruses (CMGs): African cassava mosaic virus (ACMV), East African cassava mosaic virus (EACMV), East African cassava mosaic Malawi virus.

African cassava mosaic virus (ACMV, ICTV approved acronym) is a plant pathogenic virus of the family Geminiviridae that may cause either a mosaic appearance to plant leaves, or chlorosis, a loss of Manihot esculenta (cassava), a highly valuable African food crop, the virus causes severe a is a staple food crop in many places throughout the tropics and subtropics as Class: incertae sedis.

African cassava mosaic disease (ACMD)is caused by a virus and, as its implies, appears to be confined to Africa.A similar disease caused by a closelyrelated virus occurs in India, but the virus which causes the disease known ascassava mosaic disease, found in South America, belongs to adifferent group.

It follows, therefore, that the original cassava introductionsinto Africa were free of the Cited by: Unit 7 Crop protection Unit 10 Utilization of cassava and its products Figure Cassava plant damaged by cassava mealybug Figure Cassava plant damaged by cassava green mite Figure Stages in a biological control program Unit 8 Storage of fresh cassava Figure Fully filled trenches under a shed.

It is the vector of cassava mosaic geminiviruses (CMGs) that cause cassava mosaic disease (CMD) that leads to yield losses ranging from 15 to 27% in Africa (Thresh et al., ).

Furthermore, B. Abstract. Cassava mosaic disease (CMD) is caused by whiteflyborne viruses of the genus Begomovirus (family Geminiviridae).The disease has long been regarded as the most important of those affecting cassava in sub-Saharan Africa, and has been the subject of much research, especially since the onset of the current very damaging pandemic in eastern and central Africa.

The current pandemic of cassava mosaic virus disease [cassava African mosaic bigeminivirus] (CMD) in Uganda and various approaches to its control are described. Problems were first reported in in Luwero district where c. ha of cassava were severely affected.

Similar reports were received from many other localities and the affected area has since extended progressively southwards Cited by: Cassava cultivation can be adapted to variable environmental conditions, even during long drought periods (12).

However, African cassava mosaic disease (CMD) represents nowadays one of the major biotic constraints affecting cassava cultivation in tropical and subtropical regions (5, 11). This disease is caused by single-stranded. Cassava mosaic virus disease (CMD) is caused by cassava mosaic geminiviruses (CMGs), in the family Geminiviridae and genus Begomovirus.

Three species are recognised: African cassava mosaic virus (ACMV), East African cassava mosaic virus (EACMV) and South African cassava mosaic virus (SACMV). This book summarizes the recent history of cassava mosaic virus disease in Uganda, western Kenya, and north-western Tanzania.

It describes the main features of the pandemic and the various approaches to its control. It discusses the lessons learnt from these control programmes and also assesses the threat to other parts of Kenya and Tanzania, and elsewhere in sub-Saharan by: Nine viruses have been isolated from African cassava, but only cassava mosaic geminiviruses (CMGs) and Cassava brown streak virus (CBSV) cause diseases of major economic signifi cance.

African food crop. Cassava mosaic disease (CMD) Distribution confirmed and the mosaic disease of cassava in South America is caused by a different virus. means of control that seek to make the most effective use of phytosanitation and resistant varieties (Hillocks, ).File Size: KB.

SUMMARY: Cassava mosaic disease (CMD) is widespread, occurring in all countries in Africa where cassava is grown. This viral disease has been present in Africa for over a hundred years yet caused relatively little concern until the s, when an outbreak of a damaging epidemic began in Uganda and now affects all neighbouring Size: KB.

African cassava mosaic disease (ACMD) is caused by a virus and, as its name implies, appears to be confined to Africa. A similar disease caused by a closely related virus occurs in India, but the virus which causes the disease known as cassava common mosaic disease, found in.

mosaic disease, cassava bacterial blight, cas-sava anthracnose disease, cassava bud necro-sis, and root rots. Some of these diseases at-tack the leaves and stems of cassava plants while others attack the storage roots.

Leaf and stem diseases Common leaf and stem diseases of cassava are cassava mosaic disease, cassava bacterialFile Size: 1MB. AFRICAN CASSAVA MOSAIC DISEASE Africa cassava mosaic disease (ACMD) is the most important of all cassava diseases known in Africa. Almost all traditional cultivars of cassava cultivated in different countries on the African continent are susceptible to this disease.

Yield losses due to cassava mosaic disease range between % in susceptible. The Control of African Cassava Mosaic Virus Disease: Phytosanitation and/or Resistance?, J.M. Thresh, G.W. Otim-Nape and D. Fargette Cassava (Manihot esculenta Crantz) is an important staple food crop in many parts of sub-Saharan Africa.

The main disease affecting the File Size: KB. Cassava (Manihot esculenta Crantz) is one of the most important root staple crops in Zambia. An estimated 30% of Zambians, over 4 million people, consume cassava as part of their daily diet. Cassava is mostly grown by subsistence farmers on fields of less than 1 ha.

Cultivation of cassava is hampered by several biotic constraints, of which cassava mosaic disease (CMD) is currently the most Author: Patrick Chiza Chikoti, Rabson Mpundu Mulenga, Mathias Tembo, Peter Sseruwagi. National Questionnaires: African Cassava Mosaic Disease and Its Control.

Special Report to International Seminar on African Cassava Mosaic Disease and its Control. Yamoussoukro, Côte d’Ivoire, 4–8 May CTA/FAO/ORSTOM/IITA/CPI.

Google ScholarCited by: EPIDEMIOLOGY OF CASSAVA MOSAIC DISEASE AND MOLECULAR CHARACTERIZATION OF CASSAVA MOSAIC Differential primer PCR and RFLP’s showed that African cassava mosaic virus (ACMV) was the most prevalent virus in South Africa and that mixed infections were and UN/R.

Lane 2 is the positive control. ix FIGURE A and B. PCR products obtained. Whiteflies (Bemisia tabaci [Genn]). In Uganda B. labaci is important as a vector of African cassava mosaic disease (ACMD).

The possibility of developing cassava varieties that have some relative resistance to B. tabaci could form the basis of an integrated approach to its control and to the control of ACMD.

The use of cultural practices such as. The cassava mosaic virus disease (CMD) is considered the most devastating disease of cassava in Africa. Annual yield loose on the continent amount to over Author: Yvonne Lokko. probably the almost ubiquitous presence of Africancassava mosaic disease.

In the first part of this the occurrence and effects of the disease are second part deals with methods of controlling the disease, and includes a brief outline of other cassava disease and pestproblems. The final part discusses cassava progagation methods.

In addition, whiteflies are vectors for viruses that cause cassava mosaic disease (CMD) and cassava brown streak disease (CBSD), which can cause total crop failure. Key recommendations for control of CMD and CBSD are strict enforcement of quarantine procedures during international exchange of germplasm, and cultural practices, especially the.

Two methods of control of African cassava mosaic virus are advocated. In Kenya (Bock & Guthrie, ; Bock, ) and the Ivory Coast (Fargette et al., ), control can be achieved by propagating virus-free planting material of existing cultivars that have moderate resistance to infection.

The book was published by the Public Understanding of Biotechnology, a programme launched by the Department of Science and Technology to recognise excellence in South African Biotechnology.

Rey, a plant virologist, also does basic research on the cassava mosaic disease (CMD) which affects a significant portion of crops grown in Africa. At Africa's independence in the s, cassava mosaic disease was a major problem.

In the s, the cassava mealybug appeared and threatened to decimate the African cassava industry. Cassava mosaic and mealybug control programs were introduced in the s to combat these two problems.

More than 90% of the more than species transmitted, however, are in the Begomovirus group. One of Africa’s most economically destructive diseases, cassava mosaic disease (CMD), is caused by a group of viruses in the Begomovirus genus.

Collectively, these are usually referred to as the cassava mosaic geminiviruses. Chapter 3 Cassava in Africa Rory J. Hillocks Natural Resources Institute, University of Greenwich, Chatham Maritime, off the East African coast in and was recorded in Zanzibar in (Purseglove, varieties resistant to cassava mosaic disease (CMD) and later to CBB.

During the s,Cited by: cassava in Nigeria. In Africa, the disease is caused by African cassava mosaic virus (ACMV), East African cassava mosaic virus (EACMV) (Bock and Woods, ; Hong et al., ) and South African cassava mosaic virus (SACMV) (Berrie et al., ).

The viruses belong to the family Geminiviridae genus Begomovirus (Mayo and Pringle, ). IICassava mosaic disease Viruses and their vectors are one of the greatest constraints to cassava production. Two groups of viruses of cassava are of importance in Africa, namely: cassava brown streak viruses (CBSVs) (Potyviridae: Ipomovirus) and the group of cassava mosaic geminiviruses (CMGs) (Geminiviridae: Begomovirus) [16].

“Emergency programme to combat the cassava mosaic disease pandemic in East Africa” began in October and this first phase was completed in September Background to Control of the CMD Pandemic After a decade of major losses to cassava production in Uganda due to the CMD pandemic (Otim-Nape et al., ), substantial experience has been.

“Laboratory Manual for the Diagnosis of Cassava Virus Diseases” is prepared for the benefit of participants of the regional training for the Disease Objective of Great Lakes Cassava Initiative (GLCI) on ‘Cassava Viruses: Biology, Diagnostics and Management’File Size: 1MB.

Biological Control of Whiteflies by Indigenous Natural Enemies CHAPTER Biological Control of Whiteflies by of African cassava mosaic disease (ACMD) in the Americas may be related to the inability of its vector, B.

tabaci, to colonize cassava (Costa and Russell, ). Since the early s, a new.EPIDEMIOLOGY OF CASSAVA MOSAIC DISEASE IN COAST PROVINCE, KENYA '//• by A.

A. SEIFt h,ve^ oF nf''RO.Cassava ranks fifth among the starch producing crops of the world, its annual bioethanol yield is higher than for any other crop. Cassava cultivar KU50, the most widely grown cultivar for non-food purposes is susceptible to Sri Lankan cassava mosaic virus (SLCMV).

The objective of this work was to engineer resistance to SLCMV by RNA interference (RNAi) in order to increase biomass yield, an.

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