国立研究開発法人 国際農林水産業研究センター | JIRCAS

Biocontrol of Sugar Beet Seedling and Taproot Diseases Caused by <I>Aphanomyces cochlioides</I> by <I>Pythium oligandrum</I> Treatments before Transplanting

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

Biocontrol activities in the oospore suspensions of 17 isolates of Pythium oligandrum (PO) were examined for their effect against post-emergence seedling diseases. The seeds of sugar beet that had been commercially chemical-pelleted to prevent pre-emergence damping-off were sown in Aphanomyces cochlioides-infested soil on trays. PO isolate MMR2 proved most effective in controlling post-emergence damping-off, at a level equivalent to that of applying fungicides. Oospore suspensions stored for 188 days or 379 days at 4°C were as effective against A. cochlioides post-emergence damping-off as chemical control. Treating soil with PO oospores by mixing suspensions into the surface of soil in paper pot nurseries or by drenching seedlings 32 days before transplanting could control Aphanomyces root rot in the field without additional applications. The control effect conferred by PO suspensions was also demonstrated in vitro. A polymerase chain reaction (PCR) assay used to detect PO indicated that this oomycete could colonize the rhizosphere of sugar beet plants cultivated in the field when applied before transplanting. These results suggest that PO has the potential to control both post-emergence damping-off and root rot caused by A. cochlioides.

刊行年月2013-01-01
作成者TAKENAKA ShigehitoISHIKAWA Shizuko
著者キーワード

Aphanomyces root rot

biological control

colonization

post-emergence damping-off

公開者Japan International Research Center for Agricultural Sciences
データ作成日2013-01-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
47
1
開始ページ75
終了ページ83
DOI10.6090/jarq.47.75
権利Japan International Research Center for Agricultural Sciences
言語eng