Maize Lethal Necrosis Disease Spreads To Uganda

Maize plants showing Maize Lethal Necrosis disease © CIMMYT via Flickr (License CC-BY-NC-SA 2.0)
Maize plants showing Maize Lethal Necrosis disease © CIMMYT via Flickr (License CC-BY-NC-SA 2.0)

Maize Lethal Necrosis disease, which was first reported in Kenya and Tanzania, has now spread to Uganda, raising concerns for food security in the country. The Ministry of Agriculture has warned that Maize Lethal Necrosis has been reported in districts in eastern Uganda, including Busia and Tororo.

A spokesman for the Agriculture Research Organisation, Robert Anguzo, has said that Ugandan scientists are working in collaboration with the International Maize and Wheat Improvement Centre (CIMMYT) to find management solutions to the disease.

More information about the pests and viruses associated with Maize Lethal Necrosis and the management of the disease can be found on the Plantwise Knowledge Bank

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Plantwise Photo Of The Month- April

Participants at the first Plant Health Rally to take place in Santa Cruz, Bolivia © CABI UK
Participants at the first Plant Health Rally to take place in Santa Cruz, Bolivia © CABI UK

To read more about the work Plantwise is doing in Bolivia follow this link. To read Spanish factsheets specific to Bolivia on the Plantwise Knowledge Bank click here.

Monitoring and Management of Desert Locusts in Africa

An adult Desert Locust © AtelierMonpli via Wikimedia Commons (License CC-BY-SA-3.0)
An adult Desert Locust © AtelierMonpli via Wikimedia Commons (License CC-BY-SA-3.0)

The United Nations Food and Agriculture Organisation (FAO) has this month warned that Desert Locust (Schistocerca gregaria) swarms are invading cropping areas of northern Sudan. The swarms originated from winter breeding areas on the Red Sea coastal plains and subcoastal areas in northeast Sudan and southeast Egypt. The situation requires close monitoring as more swarms are expected to form in the coming weeks that could move into parts of  Sudan and southern Egypt. If no further rains fall and the vegetation dries out, some of these swarms could move into the interior of both countries and also cross the Red Sea to the coast of Saudi Arabia.

Locusts belong to the Acrididae family (in the order Orthoptera which includes grasshoppers and crickets) and when triggered by certain cues such as increased crowding with other locusts have the ability to change their morphology, behaviour and physiology over several generations. This phase change occurs from a solitary to a gregarious phase, eventually causing the locusts to form dense hopper bands and swarms. One of the most serious locust pests is the Desert Locust.

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How The Gates Foundation and Carlos Slim are Supporting Innovation and Crop Improvement For Farmers

Carlos Slim, Bill Gates and Mexican Dignitaries visit CIMMYT to inaugurate the new Bioscience facilities © Eruviel Avila (CC-BY-NC-SA 2.0)
Carlos Slim, Bill Gates and Mexican Dignitaries visit CIMMYT to inaugurate the new Bioscience facilities © Eruviel Avila (CC-BY-NC-SA 2.0)

The Bill & Melinda Gates Foundation and Fundación Carlos Slim have announced a partnership in support of efforts by the Centro Internacional de Mejoramiento de Maíz y Trigo (International Maize and Wheat Improvement Center CIMMYT) in Mexico to develop and disseminate higher-yielding, more resilient wheat and maize varieties. Continue reading

New Type of Invasive Whitefly Recorded In South Africa

The whitefly Bemisia tabaci (USDA image PD USDA ARS via Wikimedia Commons)
The whitefly Bemisia tabaci (USDA image PD USDA ARS via Wikimedia Commons)

A species of whitefly that transmits cassava mosaic virus has been detected in South Africa for the first time. The whitefly, Bemisia tabaci is a cryptic species complex containing some important agricultural pests and virus vectors. The term ‘cryptic species complex’ means that Bemisia tabaci is considered to be a complex of at least 24 different species that look almost identical but are in fact genetically different.  Researchers from a range of organisations including the University of Johannesburg, the University of Witwatersrand and ARC-Vegetable and Ornamental Plant Institute conducted surveys to investigate the diversity and distribution of Bemisia tabaci species in 8 provinces in South Africa. The study aimed to update the information regarding the different Bemisia tabaci types present in the country.

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What CABI Is Doing To Tackle Major Coffee Rust Outbreaks In Central America

Guatemala has declared a state of agricultural emergency after coffee rust fungus has affected approximately 193,000ha of coffee, equating to 70% of the national crop. As a result of the outbreak, Guatemala is releasing $13.7m (£8.7m) in emergency aid to help farmers buy pesticides and to inform farmers on ways to manage the disease. Honduras and Costa Rica have already declared national emergency and El Salvador and Panama are also affected.

Coffee is a major export crop in many Central American countries and it is thought that this disease outbreak, which has been called “the worst seen in Central America and Mexico” by John Vandermeer, ecologist at the University of Michigan, will lead to big job losses. The Institute of Coffee in Costa Rica has estimated that the latest coffee rust outbreak may reduce the 2013-2014 harvest by 50% or more in the worst affected areas.

To find out more information about coffee rust view our Plantwise Knowledge Bank- Coffee Leaf Rust PDF booklet.

Symptoms of Coffee Rust (Hemileia vastatrix) © Carlos Roberto Carvalho, Ronaldo C. Fernandes, Guilherme Mendes Almeida Carvalho, Robert W. Barreto, Harry C. Evans (2011): Cryptosexuality and the Genetic Diversity Paradox in Coffee Rust, Hemileia vastatrix. PLoS ONE 6(11): e26387. {{doi:10.1371/journal.pone.0026387}} (CC-BY 2.5)
Symptoms of Coffee Rust (Hemileia vastatrix) © Carlos Roberto Carvalho, Ronaldo C. Fernandes, Guilherme Mendes Almeida Carvalho, Robert W. Barreto, Harry C. Evans (2011): Cryptosexuality and the Genetic Diversity Paradox in Coffee Rust, Hemileia vastatrix. PLoS ONE 6(11): e26387. {{doi:10.1371/journal.pone.0026387}} (CC-BY 2.5)

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Plantwise Photo Of The Month – February

A farmer getting advice at a plant clinic in Nepal  © Dannie Romney/CABI UK
A farmer getting advice at a plant clinic in Nepal © Dannie Romney/CABI UK

To read more about plant clinics in Nepal and to watch a video of a plant clinic in action, click here.

To find out more about plant pests and diseases in Nepal visit the Plantwise Pest Distribution map