Translocation of Fungicides and Their Efficacy in Controlling Phellinus noxius, the Cause of Brown Root Rot Disease

Translocation of Fungicides and Their Efficacy in Controlling Phellinus noxius, the Cause of Brown Root Rot Disease

Brown root rot disease (BRRD), caused by Phellinus noxius, is an important tree disease in tropical and subtropical areas. To improve chemical control of BRRD and deter emergence of fungicide resistance in P. noxius, this study investigated control efficacies and systemic activities of fungicides wi...

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Veröffentlicht in:Plant disease. - 1997. - 107(2023), 7 vom: 25. Juli, Seite 2039-2053
1. Verfasser: Liao, Ting-Zhi (VerfasserIn)
Weitere Verfasser: Chen, Yu-Hsuan, Tsai, Jyh-Nong, Chao, Chieh, Huang, Tzu-Pi, Hong, Cheng-Fang, Wu, Zong-Chi, Tsai, Isheng Jason, Lee, Hsin-Han, Klopfenstein, Ned B, Kim, Mee-Sook, Stewart, Jane E, Atibalentja, Ndeme, Brooks, Fred E, Cannon, Philip G, Farid, A Mohd, Hattori, Tsutomu, Kwan, Hoi-Shan, Ching Lam, Regent Yau, Ota, Yuko, Sahashi, Norio, Schlub, Robert L, Shuey, Louise S, Tang, Alvin M C, Chung, Chia-Lin
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article Bischofia javanica Phellinus noxius bishop wood gas chromatography tandem mass spectrometry (GC-MS/MS) liquid chromatography tandem mass spectrometry (LC-MS/MS) systemic fungicide Fungicides, Industrial epoxiconazole U80T84L776 Epoxy Compounds
Beschreibung
Zusammenfassung:Brown root rot disease (BRRD), caused by Phellinus noxius, is an important tree disease in tropical and subtropical areas. To improve chemical control of BRRD and deter emergence of fungicide resistance in P. noxius, this study investigated control efficacies and systemic activities of fungicides with different modes of action. Fourteen fungicides with 11 different modes of action were tested for inhibitory effects in vitro on 39 P. noxius isolates from Taiwan, Hong Kong, Malaysia, Australia, and Pacific Islands. Cyproconazole, epoxiconazole, and tebuconazole (Fungicide Resistance Action Committee [FRAC] 3, target-site G1) inhibited colony growth of P. noxius by 99.9 to 100% at 10 ppm and 97.7 to 99.8% at 1 ppm. The other effective fungicide was cyprodinil + fludioxonil (FRAC 9 + 12, target-site D1 + E2), which showed growth inhibition of 96.9% at 10 ppm and 88.6% at 1 ppm. Acropetal translocation of six selected fungicides was evaluated in bishop wood (Bischofia javanica) seedlings by immersion of the root tips in each fungicide at 100 ppm, followed by liquid or gas chromatography tandem mass spectrometry analyses of consecutive segments of root, stem, and leaf tissues at 7 and 21 days posttreatment. Bidirectional translocation of the fungicides was also evaluated by stem injection of fungicide stock solutions. Cyproconazole and tebuconazole were the most readily absorbed by roots and efficiently transported acropetally. Greenhouse experiments suggested that cyproconazole, tebuconazole, and epoxiconazole have a slightly higher potential for controlling BRRD than mepronil, prochloraz, and cyprodinil + fludioxonil. Because all tested fungicides lacked basipetal translocation, soil drenching should be considered instead of trunk injection for their use in BRRD control
Beschreibung:Date Completed 27.07.2023
Date Revised 27.07.2023
published: Print-Electronic
Citation Status MEDLINE
ISSN:0191-2917
DOI:10.1094/PDIS-06-22-1285-RE