島根農科大学研究報告

Shimane Agricultural College

ISSN:0559-8311

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島根農科大学研究報告 13

1965-01-10 発行

ウリ類たんそ病の発病に対する窒素肥料ならぴに病原菌菌そう発育に及ぽす炭素源の影響(予報)

Effects of Nrtrogen Fertilizer upon the Occurrence of Anthracnose in Cucumber Plants and of Carbon Sources upon the Mycelial Growth of the Causal Fungus (A Preliminary Report)

Yasumori, Hiroshi

Yamada, Kazuto

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This paper deals with the results of the experiments on the relation between the nitrogen fertilizer supplied in sand culture of cucumber plants and the occurrence of anthracnose, and on the chemical components within the leaves.
The number of spots on leaves of the plants was largest when the standard amount of ammonium sulfate in nutrient solution was supplied, but it decreased in the case of a smaller or a larger amount of ammonium sulfate. The change of susceptibility seemed to be almost parallel to that of carbohydrate amount on the leaves varying with different nutrient solutions. On the contrary, no correlation was observed between the susceptibility and the nitrogen amount in leaves. The causal fungus seemed to consume di- or poly-saccharide after digesting it into monosaccbaride.

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