Pseudomonas viridiflavaによるトマト黒斑細菌病

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タイトル別名
  • Bacterial Black Spot of Tomato Caused by <i>Pseudomonas viridiflava</i>
  • <i>Pseudomonas viridiflava</i>によるトマト黒斑細菌病
  • Pseudomonas viridiflava ニヨル トマト コクハン サイ

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抄録

A bacterial disease of tomato new to Japan was found in Tokushima prefecture in 1976. The bacterium attacks leaf blades and sepals of tomato grown in plastic greenhouse during cold season. It also attacks petioles and stems during warm season in plastic greenhouse as well as in open culture. The symptoms on leaf blades are characterized by irregular black spots of three to four millimeters in size, and those on petioles and stems are dark-green sunken streaks accompanied by internal rot of parenchymatous cells. The bacterial isolates obtained from affected leaf blades, petioles and stems were quite uniform in their bacteriological characteristics. They showed a distinct pathogenicity to tomato and head lettuce by spray inoculation, and to bean, cucumber and eggplant by needle prick inoculation. The bacteriological characteristics and the pathogenicity of this bacterium were identical to those of Pseudomonas viridiflava in the previous descriptions as well as with those of the check isolate of P. viridiflava used in this experiment, SN7647, which was isolated from a cucumber plant affected by marginal blight. From these results, the causal bacterium was identified as Pseudomonas viridiflava (Burkholder 1930) Dowson 1939. This is the first report for this bacterium to attack tomato in Japan.

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