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Official Pest Reports

Official Pest Reports are provided by National Plant Protection Organizations within the NAPPO region. These Pest Reports are intended to comply with the International Plant Protection Convention's Standard on Pest Reporting, endorsed by the Interim Commission on Phytosanitary Measures in March 2002.

Mexican Flag Detection of Asian soybean rust (Phakopsora pachyrhizi) in yam bean crops in Papantla, Veracruz, Mexico
Date posted: 07/12/2007
Contact: Contact Person: Dr. Javier Trujillo Arriaga, Plant Health General Director
jtrujillo@senasica.sagarpa.gob.mx
(52) 55 55 54 64 67
By the middle of January 2007, the Plant Health General Directorate received samples of yam bean (Pachyrhizus erosus) crops folliage from the communities of Agua Dulce and Pajapan, in Papantla township, in the state of Veracruz. These samples showed signs and symptoms of Asian soybean rust (Phakopsora pachyrhizi).

These samples were analysed and processed by technical personnel of the National Center for Phytosanitary Reference Micology Laboratory, to determine the pathogen. To this end, it was necessary to analyse the morphology of its reproduction structure, as well as to conduct a molecular analysis. The results of these analysis confirmed the presence of the disease called Asian soybean rust (Phakopsora pachyrhizi).

Through the Plant Health Committee of Veracruz, the SENASICA did a follow-up of the detected outbreak, taking immediate actions to prevent the spread of the disease to other hosts by applying triazole and strobiruline fungicides. Furthermore, given the importance of the disease, yam bean growers carried out a phytosanitary survey as a culture measure in the areas where the disease was more advanced, to minimize the inoculation source for the next cycles of the crops.

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