杀菌剂对番茄细菌性斑疹病菌的毒力测定

Determination on Toxicity of Twenty-one Bactericides to Pseudomonas syringae pv.tomato

选用21种药剂来测定其对番茄细菌性斑疹病菌的毒力作用。结果表明:科博、二氯异氰尿酸钠和新植霉素对病原菌有明显的抑制作用,且其EC50值分别为1.1094、1.1169和1.0748mg/L。有效成分浓度为450 mg/L的新植霉素与有效成分浓度为5 556 mg/L的二氯异氰尿酸钠联合作用对病原菌的防治有增效作用,建议在生产上推广使用新植霉素与二氯异氰尿酸钠复配剂或科博药剂防治番茄细菌性斑疹病。

Twenty-one bactericides were used to assay the toxicity to Pseudomonas syringae pv.tomato.The results showed that Kebo,Dichloroisocyanuric acid sodium and Streptomycin＋Oxyteracykine obviously inhibited the pathogen,and their EC50 were 1.1094,1.1169 and 1.0748 mg/L,respectively.Streptomycin＋Oxyteracykine（450 mg/L） combined with Dichloroisocyanuric acid sodium（5 556 mg/L） had the synergic effects on the control of bacterial speck of tomato,which suggested that the mixture of Streptomycin＋Oxyteracykine and Dichloroisocyanuric acid sodium or Kebo be applied to control bacterial speck of tomato in fields.