Abstract: In order to provide the basic information for control of anthura bacterial blight in Tianjin, inhibition and control effects of fungicides such as ethylicin on Xanthomonas axonopodis pv. dieffenbachiae causing anthura bacterial blight were studied. Virulence of ten fungicides against X. axonopodis pv. dieffenbachiae were tested with oxford cup method. The control effects of five fungicides on bacterial blight were tested by spray methods in this study. The results showed that 80% ethylicin EC showed the most prominent inhibit effect, its EC₅₀ value was 1.511 4 mg/L. Secondly, 70% Carmazine WP, 6% primomycin WP, 90% new mycin WP and 3% mesophyllin WP showed obvious inhibit effect on X. axonopodis pv. dieffenbachiae, and their EC₅₀ value were lower, respectively, 18.348 9, 60.232 1, 78.666 6 mg/L and 84.447 2 mg/L. The EC₅₀ values of 46% Kocide WP, 20% thiediazole-copper SC and 30% copper succinate WP were all over 100 mg/L. The inhibit effects of 20% bismerthiazol WP and 72% agricultural streptomycin WP were the worst. Five fungicides were selected and tested for the greenhouse effects of anthura bacterial blight. The results showed: Ethylicin had the highest control effect, up to 76.1%, and agricultural streptomycin had the lowest control effect, only 27.1%. The control effects were as follows: ethylicin>primomycin>new mycin>copper succinate>agricultural streptomycin. Ethylicin can control anthura bacterial blight efficiently and can be applied on the disease management. However, agricultural streptomycin was not advised to usebecause of its poor control effect.

Key words: Anthurium andraeanum, bacterial blight, fungicide, inhibition, control effects