キュウリ斑点細菌病の発病に及ぼす土壌水分の影響

概要

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Relation of soil moisture to the development of angular leaf spot of cucumber was investigated. Cucumber plants grown in the pots were inoculated with Pseudomonas syringae pv. lachrymans 4days affter the soil moisture of the pots was regulated in three grades, high, middle and low. When soil moisture was kept high, very severe and typical symptoms appeared on the inoculated leaves. On the other hand, when soil moisture was kept low, minute and fewer lesions developed on the inoculated leaves. These minute lesions failed to enlarge thereafter. It was clear that soil moisture was very important condition for infection of the pathogen and development of the disease. When cucumber plants cultivated in glass houses were inoculated with the bacteria, similar results were obtained. The results showed that the higher the soil moisture the greater the extent of disease development. This is consistent with the results of pot experiments. These results show that abundant water in the soil favors the development of angular leaf spot of cucumber.
日本植物病理学会の論文
1983-04-25