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Use of public transportation for realizing a carbon-neutral society and the involved effects on local communities
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Evaluation of the timing and severity of Phytophthora infestans infection in experimental pesticide-free fields in Ebetsu City, Hokkaido in 2023
Get PDFBulletin酪農学園大学（北海道石狩管内江別市）の無防除試験圃場において，異なるバレイショ4品種（「インカのめざめ」，「キタアカリ」，「さやあかね」，「コナヒメ」）を供試し，2023年5～10月にかけてジャガイモ疫病（Phytophthora infestans）の感染時期ならびに発病程度の推移を経時的に評価した。萌芽後からの栽培期間中，日平均気温が例年を著しく上回った状態が6月中旬から9月中旬まで維持され，同期間中には断続的な降雨があった。ジャガイモ疫病に抵抗性をもたない「インカのめざめ」と「キタアカリ」では，ともに7月3～4半旬目に初発が確認されたが，感染指数が4に達するまでにそれぞれ約25日間ならびに約34日間を要し，2022年に比べて感染拡大速度が緩慢であった。圃場抵抗性を有する「さやあかね」ならびに真性抵抗性R2を有する「コナヒメ」では無防除区においても疫病感染は認められなかった。本試験結果より，2023年の時点では，北海道石狩管内江別市において，「さやあかね」がもつ圃場抵抗性ならびに「コナヒメ」がもつ真性抵抗性遺伝子R2が疫病抵抗性として有効であることが示された。Potato late blight is an important potato disease caused by Phytophthora infestance. We cultivated four potato varieties with or without resistance to late blight in a pesticied-free potato field at Rakuno Gakuen University (Ebetsu-city, Hokkaido), and the appearance and severity of the disease were evaluated over time from May through September 2023. 2023 was a year of intermittent rainfall and extremely high temperatures. After sprouting, there was intermittent rainfall, and the disease symptom was first observed in “Inkanomezame” and “Kitaakari” on July 20, but disease spread was slow in both varieties. Late blight symptoms were not observed in “Sayaakane” with quantitative (field) resistance and in “Konahime” with qualitative resistance mediated by a resistance gene. In this study, we revealed that the quantitative and qualitative resistance harbored by “Sayaakane” and “Konahime”, respectively, are functional to races of P. infestance present in Ebetsu City in 2023.departmental bulletin pape
A helminthological examination on formalin-fixed intestines from several species of the subfamily Microtinae collected in the U.S.A between the 1960's and the 1980's
Get PDFBulletin酪農学園大学に保存されていた北米のハタネズミ類腸管から得られた線虫標本について，その形態学的な観察を行い，得られた情報を図・写真と伴に附記した。Morphological examinations were conducted on nematode specimens derived from the intestinal tracts of North American voles, preserved at Rakuno Gakuen University. The findings are complemented with illustrative figures and photographs.departmental bulletin pape
Jesus, His Mother, and the Disciple whom Jesus Loved : A New Family in John 19:25-27
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