Groundnut rosette disease (GRD), caused by a complex of three agents: groundnut rosette assistor luteovirus, groundnut rosette umbravirus. It depends on groundnut rosette assistor virus (GRAV; Luteoviridae) for encapsidation in GRAV coat protein and for transmission by Aphis craccivora in the. SUMMARY: Groundnut rosette disease is the most important disease of groundnuts of sub-. Saharan Africa. Epidemics occur without warning. It is caused by a.
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Plants affected when young may produce no nuts. Two main forms of the disease, chlorotic rosette and green rosette have been described based on symptoms.
PDF Add to factsheet booklet. Management of groundnut rosette by insecticidal control of the vector has been known since the mids.
Groundnut Rosette Disease
ICRISAT scientists developed a simple and effective field screening technique to evaluate germplasm and breeding lines for resistance to rosette. Resistant varieties exist such as Serenuts series and Igola 1. Created in Uganda August Groundnut Rosette Disease Recognize the problem There are two types of symptom seen in the crops: Disase virus can spread rapidly through a crop.
Resistance to rosette was identified for the first time in Asian and South American land races. For spreading types Serenut 2 plant three plants per two feet along the row. Retrieved 13 February InICRISAT-Lilongwe launched a program on screening of global germplasm for resistance against rosette in order to diversify the genetic base of rosette resistance.
More recently it has been cultivated in other parts of the world and is an important subsistence crop in Sub-Saharan Africa. Send feedback on this factsheet. Therefore host-plant resistance to the disease and its vector is regarded as the most viable and sustainable solution. These sources formed the basis for rosette resistance breeding programs throughout Africa and have contributed to the development of several high-yielding, rosette-resistant groundnut varieties e.
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Journal of General Virology. The sources of resistance dieease West Africa have extensively been used and several long-duration, high-yielding breeding lines with resistance to rosette have been developed for evaluation and utilization by the National Agricultural Research Systems in the region.
Recently, several high-yielding short-duration days Spanish types with resistance to rosette have been developed and are in on-farm evaluation in southern and eastern Africa. Timely planting as soon as there is enough water in the soil.
If you would like to, you can learn more about the cookies we use. On-farm verification and demonstration of agronomically and commercially acceptable high-yielding, rosette-resistant medium- to short-duration groundnut groundnuut and the package of options for integrated management of groundnut rosette needs to be intensified in the region. This is to ensure that roseette give you the best experience possible. A breeding programme has been established in Malawi focussing on disease resistance, early maturity and high yield.
Research has shown that plants infected by groundnut rosette virus alone show little or no effect, but that the symptoms of the disease are caused by a satellite RNA co-infectiona subviral agent. This page was last edited on 22 Marchat Groundnut rosette virus Virus classification Group: The disease is epidemic in nature and there is a seasonal cycle of infection, but the origins of this virus are unknown.
Retrieved disese ” https: To date, about 12, germplasm lines have been screened and in excess long-duration virginia types and 20 short-duration Groundnkt types with resistance to rosette have been identified. Inheritance of rosette resistance in groundnut was confirmed.
Plantwise Factsheets for Farmers. Views Read Edit View history. Rosette is the most destructive disease of groundnut in Africa. The chlorotic and green types are caused by two variants of the satellite RNA while the mosaic type is caused by infection with a mixture of both variants.
MANAGEMENT OF GROUNDNUT ROSETTE: PAST, PRESENT, AND FUTURE
Disewse Wikipedia, the free encyclopedia. Umbraviruses Viral plant pathogens and diseases Peanut diseases. Close Find out more. This plant was infected early and will not produce any yield.
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Knowledge Bank home Change location. It is spread by aphids feeding on the crop.
Sources of resistance to rosette were first discovered in Senegal in In spite of several achievements made in the groundnnut, development of short-duration groundnut varieties with resistance to rosette remained as a challenge to ICRISAT for a long time. The recommendations in this factsheet are relevant to: Breeding for multiple resistance rosette virus complex and the vector should receive high priority.