About TAKAHASHI KENJI
About 北海道農試
About NAKAO TAKASHI
About 北海道農試
About OHARA AKIKO
About 北海道農試
About UMEMURA YOSHIKI
About 北海道農試
About 北日本病害虫研究会報
About potato
About Plant diseases caused by fungi
About Tubers(=corms)
About ジャガイモ
About そうか病
About 病斑
About 品種
About 菌
About 土壌pH
About 土壌水分