Biological effectiveness of Cymoxanil 10%, for the control of the potato late blight Phytophthora infestans Mont de Bary

The national area of potato cultivated is of 70 thousand hectares, of which half are cultivated in rain stage conditions, the potato state producers are: Mexico, Puebla, Sinaloa, Coahuila, Veracruz, Guanajuato, Michoacan, and Jalisco that occupies the first place in harvested surface. Several factor...

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Bibliographic Details
Published in:Phytopathology 2008-06, Vol.98 (6), p.S199-S199
Main Authors: Perez-Gonzalez, A, Santillan-Santana, J, Posos-Ponce, P, Martinez-Ramirez, J L, Rodriguez-Ruvalcaba, R, Duran-Martinez, C M, Aceves-Nunez, V A
Format: Article
Language:English
Subjects:
Phytophthora infestans
Solanum tuberosum
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Summary:The national area of potato cultivated is of 70 thousand hectares, of which half are cultivated in rain stage conditions, the potato state producers are: Mexico, Puebla, Sinaloa, Coahuila, Veracruz, Guanajuato, Michoacan, and Jalisco that occupies the first place in harvested surface. Several factors limit its production being the potato late blight one of the most harmful ones. The infected tubercles present on the epidermis a light coffee to purple color as a dry or humid injury, and can not present symptoms during the harvest and be pronounced in the storage. The objective was to evaluate the biological effectiveness of the fungicide Cymoxanil 10%, for the control of potato late blight, in the potato culture. The experiment was established in 2005, in the locality of Guarachanillo, Mich. A random block design was used with 5 treatments: Cymoxanil 10% with 1, 2, and 3 kg/ha; Curzate M-8 2 kg/ha and absolute witness, with 4 replies. The size of the experimental unit was of 4 furrows of 6 meters in length. The best treatments were Cymoxanil 10% (300 gr. i.a./ha.) with a control of 95% in average after three applications, followed by the treatments Cymoxanil 10% (200 gr. i.a./ha) and the regional witness Curzate M-8 (Cymoxanil + 160+1260 Mancozeb gr. i.a./ha) with an 80% control. We recommend making applications of Cymoxanil in the rank of 2.0 to 3.0 kilos by hectare with intervals of 7 days between one application and another.
ISSN:0031-949X