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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Close Find out more. Sensitive and specific methods to detect the three components of rosette disease have been developed. From Wikipedia, the free encyclopedia.
Therefore host-plant resistance to the disease and its vector is regarded as the most viable and sustainable solution. Cultural practices such as early sowing at optimal plant densities are known to reduce the disease incidence.
Virus resistant varieties of groundnut have been discovered but mostly have a long growing period five to six months rather than three to four for other varieties and may therefore be more susceptible to drought. A breeding programme has been established in Malawi focussing on disease resistance, early maturity and high yield.
Continuing to use grounndut. Groundnut rosette virus Virus classification Group: Groundnut Rosette Disease Recognize the problem There are two types of symptom seen in the crops: Created in Uganda August A package of options has been developed and is being verified on-farm in three agroecologies in Malawi.
The sources of resistance from 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 broundnut the National Agricultural Research Systems in the region.
Yellow Rosette Virus, no yield will come from the infected plant right. The virus can spread rapidly through a crop. PDF Add to factsheet booklet.
However, most of the rosette-resistant varieties released to date are late maturing and are not suitable to some production systems in Africa where the rainy season is short. For example, the rosette epidemic in in central Malawi and eastern Zambia destroyed the crop to such an extent that the total area of groundnut grown in Malawi fell from 92, ha in to 65, ha in Groundnut rosette virus EoL: The recommendations in this factsheet are relevant to: Send feedback on this factsheet.
Plants affected when young may produce no nuts.
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Groundnut Rosette Disease
Articles with ‘species’ microformats All articles with dead external links Articles with dead external links from March Articles with permanently dead external links. This plant was infected early and will not produce any yield. Knowledge Bank home Change location. Groundnht, 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.
Groundnut rosette virus disease is a very serious disease of groundnuts in Uganda.
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Journal of General Virology. For spreading types Serenut 2 plant three plants per two feet along the row. The sources of resistance identified in global germplasm need to be characterized based on DNA profile and using molecular markers.
It is spread by aphids feeding roette the crop. There is no control for the virus once a plant is infected but control of the aphids will prevent further spread. This is to ensure that we give you the best experience possible.
Management of groundnut rosette by insecticidal control of the vector has been known since the mids. Current knowledge on epidemiology of groundnut rosette is very scanty to form the basis for disease forecasting and designing comprehensive disease management strategies or explain the sporadic epidemics of the disease. It is transmitted between plants by insect vectors such as the groundnut aphid Aphis craccivora.
MANAGEMENT OF GROUNDNUT ROSETTE: PAST, PRESENT, AND FUTURE
Spray whole plant with insecticides, such as eosette, 14 days after emergence usually 5mls per 2 litres of water but read the label for instructions and then at day intervals for a total of four sprays.
Retrieved 13 February High degree grundnut resistance to rosette or its vector was recently identified in wild Arachis species. Utilization of wider gene pools should result in identification of certain cross combinations with high recovery of disease resistance and more useful recombinants.