The Bioactivity and Efficacy of Benzovindiflupyr Against Corynespora cassiicola, the Causal Agent of Cucumber Corynespora Leaf Spot

Corynespora cassiicola, which causes Corynespora leaf spot, results in considerable yield loss of cucumber grown in greenhouses. Frequent reports of reduced efficacy and control failure of fungicides warrant new, efficient alternative chemistries. In this study, the sensitivity of C. cassiicola to b...

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Veröffentlicht in:Plant disease. - 1997. - 105(2021), 10 vom: 09. Okt., Seite 3201-3207
1. Verfasser: Zhu, Jiamei (VerfasserIn)
Weitere Verfasser: Li, Xiuhuan, Zhang, Lingyan, Gao, Yangyang, Mu, Wei, Liu, Feng
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article chemical management disease management fungi vegetables Norbornanes Pyrazoles benzovindiflupyr S98L0WK1W7
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520 |a Corynespora cassiicola, which causes Corynespora leaf spot, results in considerable yield loss of cucumber grown in greenhouses. Frequent reports of reduced efficacy and control failure of fungicides warrant new, efficient alternative chemistries. In this study, the sensitivity of C. cassiicola to benzovindiflupyr was evaluated using a collection of 81 isolates collected from Shandong, China. The mean EC50 values for mycelial growth, spore germination, and germ tube elongation of C. cassiicola were 0.69 ± 0.44, 0.12 ± 0.063, and 0.13 ± 0.076 µg ml-1, respectively. Benzovindiflupyr treatment led to a reduced respiration rate and ATP production of C. cassiicola and decreased spore pathogenicity by 21.9% on average. Additionally, detached cucumber leaves sprayed with fungicides before or after inoculation were used to assess the efficacy of benzovindiflupyr against C. cassiicola. Benzovindiflupyr (150 µg ml-1) exhibited preventive and curative efficacies of 86.9 and 77.1%, respectively. Benzovindiflupyr at 150 g a.i. ha-1 provided over 70% efficacy in field trials performed in 2018 and 2019, which was significantly higher than that of the reference fungicides fluopyram and fluxapyroxad at the same dose. Furthermore, the yield of commercial cucumber increased as disease incidence decreased. Our findings pave the way for the introduction of benzovindiflupyr in the integrated management of Corynespora leaf spot 
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700 1 |a Li, Xiuhuan  |e verfasserin  |4 aut 
700 1 |a Zhang, Lingyan  |e verfasserin  |4 aut 
700 1 |a Gao, Yangyang  |e verfasserin  |4 aut 
700 1 |a Mu, Wei  |e verfasserin  |4 aut 
700 1 |a Liu, Feng  |e verfasserin  |4 aut 
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