キャベツセル成型苗の育苗条件が黒すす病の発生に及ぼす影響

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  • Effect of Cultivation Conditions of Cabbage Plugs on Sooty Spot Disease
  • キャベツセル セイケイ ナエ ノ イクビョウ ジョウケン ガ クロ ススビョウ ノ ハッセイ ニ オヨボス エイキョウ

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Conidia of Alternaria brassicicola on plug trays and in soil may not be a source of black sooty spot disease in cabbage plugs. Under the conditions that hindered germination, misfire of cabbage seeds contaminated with conidia increased and the symptoms of plug seedlings growing from the contaminated seeds became severe. Ebb and flow irrigation did not differ from shower irrigation in the frequency of germination or number of diseased seedlings after sowing the contaminated seeds. After inoculation of the seedlings with the pathogen, ebb and flow irrigation decreased the frequency of infection and the degree of the symptoms. It also suppressed secondary infection.

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