Data/hora: 13/06/2024 06:23:42

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 11/08/1992
Data da última atualização: | 11/08/1992
Autoria: | GOTTWALD, T. R.; GRAHAM, J. H.
Afiliação: | United States Dept. of Agriculture, 2120 Camden Road, Orlando, Fl 32803; IFAS, Citrus Research and Education Center, 700 experiment Station Road, Lake Alfred, FL 33850.
Título: | Analysis of epidemics of citrus bacterial spot in florida citrus nurseries.
Ano de publicação: | 1991
Fonte/Imprenta: | Proc. Fla. State Hort. Soc. v.104, p.163-168, 1991.
Idioma: | Inglês
Conteúdo: | The distribution of citrus bacterial spot infected plants caused by Xanthomonas campestris vp. citrumelo was studies in four nurseries in central and southwest Florida.Diseased trees were determined to be highly clustered in all cases. These clusters of infected plants extended both down and across nursery rows although the disease often was more restricted to adjacent plants within nursery rows and less to plants across rows. In one nursery, disease on rootstock plants was directly related to disease on new scion shoots in the  same area. Two nurseries had discrete areas of higher levels of disease which were interpreted as foci from which the disease eventually spread. Disease gradients in one of these nurseries were longest within rows to the north, corresponding to mechanical pruning in that direction. Disease gradients from the focus in a second nursery, where less maintenance was performed, were longest diagonally across rows, indicating natural spread emanated from a focus primarily to the southeast. The presence or absence of natural disease spread versus mechanical spread alone was directly related to the aggressiveness of the bacterial strains, presence or absence of copper bactericides, and cultural management.
Palavras-Chave: | Citrus canker; disease eradication.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)

Exemplares:

CNPMF - (1997-1) - ADC - AP - -- - 635.05 -  - 635.05 - DIS
CNPMF - (3029-1) - ADC - AP - -- - 635.05 -  - 635.05 - DIS