Antagonism of Yeasts to Xanthomonas Campestris PV. Campestris on Cabbage Phylloplane in field
Rev. microbiol
;
30(3): 191-5, jul.-set. 1999. graf
Artigo
em Português, Inglês
| LILACS
| ID: lil-253772
ABSTRACT
Twenty yeast isolates, obtained from cabbage phylloplane, were evaluated for antagonistic activity against Xanthomonas campestris pv. campestris, in field. Plants of cabbage ev. Midori were pulverized simultaneously with suspensions of antagonists and pathogen. After 10 days, plants were evaluated through percentage of foliar area with lesions. Percentage of disease severity reduction (DSR per cent) was also calculated. Yeast isolates LR32, LR42 and LR19 showed, respectively, 72, 75 and 79 (per cent) of DSR. These antagonists were tested in seven different application periods in relation to pathogen inoculation (T1=4 d before; T2=simultaneously; T3=4 d after; T4=4 d before + simultaneously; T5=4 d after + simultaneously; T6=4 d before + 4 d after; T7=4 d before + simultaneously + 4 d after). The highest DSRs were showed by LR42 (71 per cent), LR42 (67 per cent), LR35 (69 per cent) and LR19 (68 per cent) in the treatments T7, T4, T5, and T6, which significantly differed from the others. The same yeast antagonists were also tested for back rot control using different cabbage cultivars (Fuyutoyo, Master-325, Matsukaze, Midori, Sekai I and Red Winner). The DSRs varied from 58 to 61 (per cent), and there was no significant difference among cultivars
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Leveduras
/
Brassica
/
Xanthomonas campestris
Idioma:
Inglês
/
Português
Revista:
Rev. microbiol
Assunto da revista:
Microbiologia
Ano de publicação:
1999
Tipo de documento:
Artigo
País de afiliação:
Brasil
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