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.

Author: Meztijin Maurg
Country: Montenegro
Language: English (Spanish)
Genre: Software
Published (Last): 8 June 2005
Pages: 361
PDF File Size: 10.77 Mb
ePub File Size: 6.72 Mb
ISBN: 452-5-87285-260-1
Downloads: 4175
Price: Free* [*Free Regsitration Required]
Uploader: Arashitilar

Arrasa la “Mancha de Asfalto” con siembra de maíz | El Veraz

A guide for field identification. Design of the diagrammatic logarithmic scale.

Summa Phytopathologica 34 4: Plants located up to feet away from a source of inoculum were infected in Puerto Rico Liu, Summa Phytopathologica 32 3: In Mexico, disease is most severe at elevations of m and in the cooler months from November to April, at lower altitudes Mais et al.

Where maize [ Zea mays mancba is grown continuously in the vicinity, efforts at sanitation are not likely to be effective. Don’t need the entire report? Germination of Phyllachora maydis ascospores and conidia of Monographella maydis.

Antiguas variedades de maíz aportan modernas soluciones al complejo de la mancha de asfalto

Asfwlto significant damage to leaves and yield is caused by the fungus Monographella maydis whose infection follows that of the tar-spot fungus, at least where studied in Mexico Hock et al. Summary of Invasiveness Top of page P.

The methodology proposed by Mora et al. Symptoms caused by M. Entrez cross-database search engine. Title Symptoms Caption Blight developing between ‘fisheye’ spots on Zea mays. asfalro

Phyllachora maydis (black spot of maize)

Requisitos ambientales para el desarrollo del “complejo mancha de asfalto” que ataca al mais en Mexico. The diagrammatic logarithmic scale for the TSC proposed in asfqlto study represents a standardized quantification method for the disease that will help obtain easily reproducible results, due to its high levels of accuracy and precision among several evaluators, therefore, it can be used as supporting material for different kinds of studies related to the quantification of the severity of TSC.


The source of initial inoculum for both fungi is not determined. Windborne ascospores of P. According to his key, other North American species that are similar, occur on grasses in asfaltp such as AndropogonAnthephoraBoutelouaPanicumPaspalumSpartina and Stenotaphrum. Taxonomic Tree Top of page Domain: Despite the increasing importance of TSC in maize and the resulting need to carry out epidemiological or control studies, there is no standardized quantification method of the disease that provides easily reproducible results among investigators or institutions; therefore, the asfaltl of this investigation was to design and validate a diagrammatic logarithmic severity scale for the maize – Phyllachora maydis and Monographella maydis – pathosystem that allows the evaluation of the damage caused by the disease in fields, analyzing the accuracy, precision and reproducible values generated with its use.

The clypeus stroma of Phyllachora species grows separately in the epidermis on either side of the leaf and is not an extension of the perithecia Parbery, mmaiz. Chemical Control Fenpropimorph one or two treatments and mancozeb applied every 10 days were found to be the most azfalto fungicides in field plot tests in Mexico Bajet et al. These larger lesions coalesce after days; areas between spots become water-soaked and dry out.

Other than maize, a source of initial inoculum for a new crop is unknown Hock et al. Some spots enlarge around the ascomata, with an initially water-soaked area becoming necrotic, to form circular-oval brown lesions mm diameter with a dark outer edge Bajet et al. Elaboration and validation of diagrammatic key to evaluate white rust severity in Chrysanthemum Summa Phytopathologica, Tropical Pest Management Tests of standard diagrams for field use in assessing the tarspot disease complex of maize Zea mays Tropical Pest Management, A sequence of 50 photographs of leaves and maize plants with different TSC severity levels was used, previously determining the affected area of each one of them.



When several references are cited, they may give conflicting information on the status. Share this article Bookmarks.

Initial symptoms are small, yellow-brown spots on either side of the leaf. The value of the b 0 intercept was positive in almost safalto cases, which indicates that there is a tendency to overestimate the severity of the disease; this tendency was greater for the evaluators without experience.

The authors express their appreciation to all evaluators of the Colegio de Postgraduados that participated in the validation stages of the logarithmic scale. Journal of Agriculture of the University of Puerto Rico, 42 3: Azfalto of the anamorphs of Phyllachora species tested did not germinate in water on slides or on host plants, and probably serve as spermatia in mating Parbery and Langdon, This was due to the complicated quantification system and to the elevated jancha of classes with which it was developed; furthermore, it considered the symptoms caused by both infectious agents separately.