Data/hora: 23/06/2024 12:52:05

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 16/06/2000
Data da última atualização: | 16/06/2000
Autoria: | REIFSCHNEIDER, F. J. B.
Título: | Studies on eyespot of maize (Zea mays L.) and its causal agent Kabatiella zeae Narita & Y. Hiratsuka.
Ano de publicação: | 1979
Fonte/Imprenta: | Madison: University of Wisconsin, 1979.
Páginas: | 148p.
Idioma: | Inglês
Notas: | Ph.D. Thesis.
Conteúdo: | A liquid medium, designated Kabatiella zeae medium (KZM), was developed in which up to 10 7 conidia/ml were produced in 5 days. Peptone was the most influential component in stimulating sporulation, which was highest at 25 C and pH5. Older inoculation used to seed KZM increased the time required for conidial production. Of the 29 isolates tested, only two did not sporulate in KZM or in any other medium. Because of the high yield of conidia in a short time, the ease of preraration and use, and its low cost, KZM is pespecially useful where large amounts of inoculum are needed. The possibility of seed infection was determined through the use of inoculation and seed plating. K. zeae infected 2% of seeds from ears inoculated under the husk. Colonies development onplates were commonly associated with the embryos. The host range of K. zeae was studied by testing 63 collections of the Poaceae (Gramineae) for susceptibility to the fungus in the growth chamber. greenhouse, and field. Although eight species were infected in the growth chamber, only four taxa, Zea diploperennis, Z. amys ssp. luxurians, Z. Mays ssp. mexicana, and Z. perennis, showed typical symptoms consistently under all three conditions. These four taxa were considered to be new hosts to K. zeae. Twenty-eight monoconidial isolates (Canada, 3; France, 4; Nes Zeland, 3; Yugoslavia, 1; U.S.A., 17) were used to study some aspects of the variability of k. zeae. Two basic colony types were identified on malt agar (MA): light (five isolates) and dark (...)
Palavras-Chave: | Kabatiella zeae; Maize; Plant diseases.
Thesagro: | Doença; Fungo; Milho; Patógeno; Zea Mays.
Thesaurus Nal: | fungi; pathogens.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (16537-1) - ADD - TS - -- - T052/79 - REI - T052/79 - DIS