SciELO - Scientific Electronic Library Online

 
vol.30 número3Recent advances in the study of biocorrosion: an overviewBacteria and protozoa populations in groundwater in landfill area in São Carlos, SP índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista de Microbiologia

versión impresa ISSN 0001-3714

Resumen

ASSIS, Sayonara M.P. et al. Antagonism of yeasts to Xanthomonas campestris pv. campestris on cabbage phylloplane in field. Rev. Microbiol. [online]. 1999, vol.30, n.3, pp. 191-195. ISSN 0001-3714.  http://dx.doi.org/10.1590/S0001-37141999000300002.

Twenty yeast isolates, obtained from cabbage phylloplane, were evaluated for antagonistic activity against Xanthomonas campestris pv. campestris, in field. Plants of cabbage cv. 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%) was also calculated. Yeast isolates LR32, LR42 and LR19 showed, respectively, 72, 75 and 79% 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%), LR42 (67%), LR35 (69%) and LR19 (68%) in the treatments T7, T4, T5 and T6, which significantly differed from the others. The same yeast antagonists were also tested for black rot control using different cabbage cultivars (Fuyutoyo, Master-325, Matsukaze, Midori, Sekai I and Red Winner). The DSRs varied from 58 to 61%, and there was no significant difference among cultivars.

Palabras llave : Xanthomonas campestris pv. campestris; cabbage; biocontrol; yeasts.

        · resumen en Portugués     · texto en Inglés     · pdf en Inglés