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First global case of new cassava disease confirmed in Brazil

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The first global case of wire-burning disease in cassava was registered by the Brazilian Agricultural Research Corporation (Embrapa) in Brazil. Molecular and biological analyses identified the fungus, Rhizoctonia solani AG-1 IA, which attacks the aerial part of the plant, in crops in the municipality of Mncio Lima, in the Juru region, which produces the most cassava in the state of Acre.

The first global case of wire-burning disease in cassava was registered by the Brazilian Agricultural Research Corporation (Embrapa) in Brazil. Molecular and biological analyses identified the fungus, Rhizoctonia solani AG-1 IA, which attacks the aerial part of the plant, in crops in the municipality of mncio Lima, in the Juru region, which produces the most cassava in the state of Acre.

The discovery was published in the Australasian Plant Disease Notes magazine. With this identification, coordinated by a researcher at Embrapa, Acre Amauri Siviero, it is now possible to advance the research for the genetic improvement of the culture and the recommendation of effective disease control measures.

In field expeditions, we found that some 10% of the plants in the fields reported burning characteristics in the foliage. From samples of infected materials collected in different cultures, we performed pathogenicity tests for the characterization and reproduction of disease symptoms in the laboratory. Based on the isolated material, molecular and biological analyses were conducted to identify the fungus (pathogen). The results allowed us to conclude that this disease has never been reported in any cassava crop in any country, said Siviero.

 

See full article at Agropages

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