関東東山病害虫研究会報
Online ISSN : 1884-2879
Print ISSN : 1347-1899
ISSN-L : 1347-1899
病害の部
Pythium aphanidermatumによるレタス立枯病 (病原追加) とその発生への気温の影響
山内 智史窪田 昌春
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2016 年 2016 巻 63 号 p. 25-28

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Damping-off of leaf lettuce (Lactuca sativa var. crispa) occurred in Ibaraki Prefecture in September, 2013. The causal agent was identified as Pythium aphanidermatum on the basis of morphology, suitable growth temperature and ribosomal DNA internal transcribed spacer (rDNA-ITS) region. We propose that P. aphanidermatum should be added to the pathogens of damping-off of lettuce. The degree of virulence, rot and wilt of leaves, and growth inhibition of plant, was more remarkable at relatively high temperature conditions.

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© 2016 関東東山病害虫研究会
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