Abstract
We investigated the control effect of bactericides, mainly antibiotics, on bacterial shot hole disease caused by Xanthomonas campestris pv. pruni in peach from 1998 to 2005 in relation to the severity of infection. The antibiotic streptomycin was effective giving a protective value of 63-67 in the untreated plots when the percentage of infected fruit was 5.5-9.8%. At a higher rate of infection, however, the protective value decreased. Streptomycin was as effective as the other bacteriocides (oxytetracycline, validamycin and dithianon) when the rate of infection in the untreated plot was low. The efficacy of streptomycin was not improved by combined administration with ziram-thiram compounds.
