Density of Pythium zingiberum Oospores in Relation to Infection of Chenopodium quinoa Seedlings

• IKEDA Akihiro

• ICHITANI Takio

抄録

The infectivity tests were repeated and the average results obtained indicated that more than 1×10^4 oospores per gram oven dry soil (OPG) caused damping-off of 80% of Chenopodium quinoa seedlings. About 20% damping-off occurred with 1×10^3 OPG. With 1×10^2 OPG the average was 6%, and penetrating mycelium and oospores were easily recognized. Neither penetration nor disease incidence was found with 1×10 OPG. Thus, the minimum number of oospores capable of inducing disease was estimated to be 10-1×10^3/g oven dry soil. The fact that P.zingiberum needs much more oospores than P.butleri to induce disease may be connected with lower germinability of oospores of the former.

収録刊行物

• Bulletin of the University of Osaka Prefecture. Ser. B, Agriculture and biology

  Bulletin of the University of Osaka Prefecture. Ser. B, Agriculture and biology 37 13-18, 1985-03-31

  University of Osaka Prefecture

詳細情報

• CRID: 1390854717502743680
• NII論文ID: 110004788942
• NII書誌ID: AA00106812
• DOI: 10.24729/00009338
• HANDLE: 10466/3191
• Web Site: https://omu.repo.nii.ac.jp/records/9345
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • CiNii Articles
• 抄録ライセンスフラグ: 使用可