Evaluation of the antibacterial activity of 19 bactericides against bacteri-al fruit blotch
Bacterial fruit blotch(Acidovorax citrulli)is a severe disease in melon,resulting in significant yield reductions and even complete crop failure.Despite its significant impact,effective chemical control strategies for this disease remain elusive.To address this issue,the author conducted an evaluation of 19 bactericides to identify highly efficient agents against A.citrulli.Both in vitro and in vivo antimicrobial activity of the bactericides were assessed.From the initial in vitro screening,eight fungicides showing higher sensitivity were for further investigation of their bactericidal toxicity.The results revealed the following ranking of toxicity strengths:0.3％Tetracycline AS＞1％Shenqinmycin SC＞5％Benzio-thiazolinone SC＞20％Dioctyldiethylenetriamine AS＞20％Albendazole SC＞4％Kasugamycin AS＞0.4％Cnidium lactone AS＞0.5％Berberine AS.Subsequent greenhouse experiments confirmed the effectiveness of 0.5％Berberine AS,20％Albendazole SC,4％Kasugamycin AS,and 5％Benziothiazolinone SE in preventing and treating BFB in melon seedlings.Particularly,0.5％Berberine AS exhibited the highest efficacy,with prevention and treatment rates of 79.66％and 73.24％,respectively,at a concentration of 100 mg·L-1.The findings in this research suggest that 0.5％Berberine AS,20％AlbendazoleSC,4％Kasugamycin AS,and 5％Benziothiazolinone SC hold promise as potential effective agents for the field control of bacterial fruit blotch.
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