English: tar spot; tar spot of maize; Spanish: mancha de asfalto; mancha negra; mancha negra del maiz; French: tache noire du mais. El “complejo mancha de asfalto” del maíz, su distribución geográfica, requisitos Etiología y manejo de la mancha de asfalto (Phyllachora maydis Maubl.). mancha de asfalto del maiz . Malaguti, G. Subero, L.J.. Access the full text: NOT AVAILABLE. Lookup the document at: google-logo. mancha de asfalto del.
|Published (Last):||1 October 2006|
|PDF File Size:||11.44 Mb|
|ePub File Size:||5.42 Mb|
|Price:||Free* [*Free Regsitration Required]|
Escala Diagramática de Severidad para el Complejo Mancha de Asfalto del Maíz
Cryptogamic Botany, 2 The tar spot complex of msiz, induced by the fungi Phyllachora maydis and Monographella maydisis a disease of economic importance in Mexico and Central America because it causes severe yield losses. Fungi of Trinidad and Tobago. The precision values observed in the evaluators without experience are acceptable; prior training could have a positive influence on the quality of the evaluations.
Control of tar spot of maize and its effect on yield. When several references are cited, they may give conflicting information on the status.
Antiguas variedades de maíz aportan modernas soluciones al complejo de la mancha de asfalto
Rainfall was not a significant factor in disease progress and severity. Studies on graminicolous species of Phyllachora Fckl. In Mexico, disease is most severe at elevations of m and in the cooler months from November to April, at lower altitudes Bajet et al. Entrez cross-database search engine.
Phyllachora maydis (black spot of maize)
Evaluation of the criteria of species. Disease assessment terms and concepts. Infection may also occur at the 8 to 10 leaf stage Hock et al.
Lower leaves should be examined for small, raised, glossy, dark, circular, or oval to irregular, spots, or for brown lesions, often with a dark border, having a dark ascomata at the centres CIMMYT, If maize [ Zea mays ] is not in continuous cultivation locally and the fungus does not survive well in crop debris, then volunteer plants or wild species of Zea or other grasses are the likely sources of ascospores.
El “complejo mancha de asfalto” de maiz, su distribucion geografica, requisition ambientales e importancia economica en Mexico. Survey of insect pests and plant diseases of selected food crops of Mexico, malz America and Panama.
In regards to this, Michereff et al.
Revista mexicana de fitopatología
Known primarily from the cooler and asfaltto elevations Malaguti and Subero, ; Bajet et al. Transactions of the Illinois State Academy of Science, Reduction in size of P. Like other species of Phyllachorait has a pycnidial anamorph in the genus Linochora Parbery, ; Muller and Samuels, Chemical Control Fenpropimorph one or two treatments and mancozeb applied every 10 days were found to be the most effective fungicides in field plot tests in Mexico Bajet et al.
Tropical Pest Management The linear regression of the severities estimated by the evaluators produced coefficients of determination that varied within the range of 65 to 91 Table 1.
Don’t need the entire report? Inheritance of resistance to tar spot complex in maize.
The methodology proposed by Mora et al. The precision and accuracy was determined by a simple linear regression analysis between actual and estimated severity.
Watson lists it as present in Brazil, but Hock et al. Title Asci Caption Asci of Phyllachora maydis. Incidence of tar spot disease of corn in Puerto Rico. Another member of the fungus complex associated with tar spot is Coniothyrium phyllachoraea pycnidial fungus xe is considered to be a hyperparasite on Phyllachora. The source of initial inoculum for both fungi is not determined.
Organizations Top of page Mexico: Given the growing importance, standardized methods are required to quantify disease that allow for reproducible epidemiological methods. Sequential development of pathogens in the maize tarspot disease complex.
In the field, it has been observed that the maize is first mazi by P. An annotated list of seed-borne diseases. American Phytopathological Society, Share this article Bookmarks. This has been reported, among others, by Barbosa et al.