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Sun L, Na R, Jiang C, Cui K, He Y, Zhao T, Zhang J, He L, Zhou L. Bioactivity and Control Efficacy of Benzovindiflupyr Against Athelia rolfsii in China. PLANT DISEASE 2023; 107:2359-2364. [PMID: 36691274 DOI: 10.1094/pdis-10-22-2463-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Athelia rolfsii is a devastating soilborne pathogen that causes stem rot of peanut and severely restricts peanut production. The new generation of succinate dehydrogenase inhibitor (SDHI) fungicide benzovindiflupyr has been registered in the United States and Brazil for managing multiple plant diseases. However, it is not registered in China to control peanut stem rot. In this study, 246 isolates from major peanut production areas in Shandong, Henan, and Hebei Provinces of China were used to determine the baseline sensitivity of A. rolfsii to benzovindiflupyr. The frequency of EC50 values of benzovindiflupyr was unimodally distributed with an average EC50 of 0.12 ± 0.05 mg/liter and a range of 0.01 to 0.57 mg/liter. Benzovindiflupyr can also strongly inhibit the germination of sclerotia, with an average EC50 of 2.38 ± 1.04 mg/liter (n = 23). In addition, benzovindiflupyr exhibited great in vivo efficacy against A. rolfsii; the protective or curative efficacy (89.87%, 20.39%) of benzovindiflupyr at a concentration of 50 mg/liter was equivalent to that of the control fungicide thifluzamide at 100 mg/liter (86.39%, 16.21%). At the same concentration (e.g., 100 mg/liter), the protective efficacy (93.99%) of benzovindiflupyr was more than twice as high as the curative efficacy (45.07%). A positive correlation existed between benzovindiflupyr and isopyrazam or mefentrifluconazole, which possibly resulted from similar chemical structures or damage to the cell membrane. Our findings provide valuable information for the application of benzovindiflupyr, and the established baseline sensitivity could facilitate the monitoring and assessment of benzovindiflupyr resistance risk.
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Affiliation(s)
- Longjiang Sun
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Risong Na
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Chaofan Jiang
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Kaidi Cui
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Ya He
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Te Zhao
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Jingjing Zhang
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Leiming He
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Lin Zhou
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou 450002, Henan, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
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Niessen L, Fritze M, Wibbelt G, Puechmaille SJ. Development and Application of Loop-Mediated Isothermal Amplification (LAMP) Assays for Rapid Diagnosis of the Bat White-Nose Disease Fungus Pseudogymnoascus destructans. Mycopathologia 2022; 187:547-565. [PMID: 35931867 DOI: 10.1007/s11046-022-00650-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 07/01/2022] [Indexed: 11/28/2022]
Abstract
Pseudogymnoascus destructans (= Geomyces destructans) is a psychrophilic filamentous fungus that causes White-Nose Disease (WND; the disease associated with White-Nose Syndrome, WNS) in hibernating bats. The disease has caused considerable reductions in bat populations in the USA and Canada since 2006. Identification and detection of the pathogen in pure cultures and environmental samples is routinely based on qPCR or PCR after DNA isolation and purification. Rapid and specific direct detection of the fungus in the field would strongly improve prompt surveillance, and support control measures. Based on the genes coding for ATP citrate lyase1 (acl1) and the 28S-18S ribosomal RNA intergenic spacer (IGS) in P. destructans, two independent LAMP assays were developed for the rapid and sensitive diagnosis of the fungus. Both assays could discriminate P. destructans from 159 tested species of filamentous fungi and yeasts. Sensitivity of the assays was 2.1 picogram per reaction (pg/rxn) and 21 femtogram per reaction (fg/rxn) for the acl1 and IGS based assays, respectively. Moreover, both assays also work with spores and mycelia of P. destructans that are directly added to the master mix without prior DNA extraction. For field-diagnostics, we developed and tested a field-applicable version of the IGS-based LAMP assay. Lastly, we also developed a protocol for preparation of fungal spores and mycelia from swabs and tape liftings of contaminated surfaces or infected bats. This protocol in combination with the highly sensitive IGS-based LAMP-assay enabled sensitive detection of P. destructans from various sources.
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Affiliation(s)
- Ludwig Niessen
- TUM School of Life Sciences, Technical University of Munich, Gregor-Mendel-Str. 4, 85354, Freising, Germany.
| | - Marcus Fritze
- Applied Zoology and Nature Conservation, University of Greifswald, Loitzer Str. 26, 17489, Greifswald, Germany.,German Bat Observatory, Am Juliusturm 64, 13599, Berlin, Germany
| | - Gudrun Wibbelt
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315, Berlin, Germany
| | - Sebastien J Puechmaille
- Applied Zoology and Nature Conservation, University of Greifswald, Loitzer Str. 26, 17489, Greifswald, Germany.,ISEM, CNRS, EPHE, IRD, University of Montpellier, Montpellier, France.,Institut Universitaire de France, 75005, Paris, France
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Gao Y, Liu Y, He L, Zhu J, Wu B, Liu F, Mu W. Activity of the Novel Fungicide Mefentrifluconazole Against Colletotrichum scovillei. PLANT DISEASE 2021; 105:1522-1530. [PMID: 33237845 DOI: 10.1094/pdis-10-20-2157-re] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The prevalence and destructiveness of anthracnose, caused by Colletotrichum scovillei, in pepper production regions seriously affects pepper yield and quality. Mefentrifluconazole, the first of the isopropanol-azole subgroup of triazole fungicides, was introduced for the control of pepper anthracnose. However, the growth characteristics of pepper fruit and rapid spread of anthracnose suggest that the fungicide application method must be optimized to enhance fungicide efficacy. The sensitivity of C. scovillei to mefentrifluconazole was determined by mycelial growth and germ tube elongation assays using 157 single-spore isolates with mean 50% effective concentration values of 0.462 ± 0.138 and 0.359 ± 0.263 mg/liter, respectively. The in vivo data also showed that mefentrifluconazole had favorable protective and curative effects against pepper anthracnose. Mefentrifluconazole significantly affected C. scovillei infection on pepper by reducing appressorium formation and sporulation, shriveling spores and germ tubes, and causing the abnormal development of appressoria and conidiophores. Mefentrifluconazole could move acropetally, horizontally, and basipetally in pepper plants. Compared with a knapsack sprayer, mefentrifluconazole applied by mist sprayer exhibited significantly better activity against pepper anthracnose. Additionally, as the spray volume increased from 45 to 150 liters/ha, the control efficacy of mefentrifluconazole first increased and then tended to be steady, with an optimal spray volume of 90 liters/ha. The difference in disease control efficacy was related to the deposition and droplet distribution of mefentrifluconazole on the pepper fruit. These results provide scientific guidance for the application of mefentrifluconazole in pepper fields and improved fungicide utilization.
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Affiliation(s)
- Yangyang Gao
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
- College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
| | - Yang Liu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
- College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
| | - Lifei He
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
- College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
| | - Jiamei Zhu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
- College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
| | - Buhua Wu
- Jinan Tianbang Chemical Co. Ltd., Jinan, Shandong 251600, P.R. China
| | - Feng Liu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
- College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
| | - Wei Mu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
- College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, P.R. China
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Zheng XR, Zhang MJ, Shang XL, Fang SZ, Chen FM. Etiology of Cyclocarya paliurus Anthracnose in Jiangsu Province, China. FRONTIERS IN PLANT SCIENCE 2020; 11:613499. [PMID: 33537048 PMCID: PMC7847979 DOI: 10.3389/fpls.2020.613499] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 12/28/2020] [Indexed: 05/13/2023]
Abstract
Cyclocarya paliurus is an extremely valuable and multifunctional tree species whose leaves have traditionally been used in used in medicine or as a medicinal tea in China. In recent years, anthracnose has been frequently observed on young leaves of C. paliurus in several nurseries located in Jiangsu Province, resulting in great yield and quality losses. To date, no information is available about the prevalence of C. paliurus anthracnose in China. The main purpose of the present study was to characterize the etiology of C. paliurus anthracnose. Phylogenetic analysis of the eight-loci concatenated dataset revealed that all 44 single-spore Colletotrichum isolates belonged to three species in the Colletotrichum gloeosporioides species complex, namely, Colletotrichum aenigma, Colletotrichum fructicola, and C. gloeosporioides sensu stricto. Phenotypic features, including the colony appearance and the morphology of conidia, appressoria, and ascospores, were consistent with the phylogenetic grouping. Virulence tests validated that the three Colletotrichum species could cause typical symptoms of anthracnose on C. paliurus leaves, similar to those observed in the field. The optimum mycelial growth temperature ranged from 25 to 30°C for all representative isolates, while C. gloeosporioides s. s. isolates exhibited greater tolerance to high temperature (40°C). Fungicide sensitivity assays indicated that all three Colletotrichum species were sensitive to tetramycin, which may be a potential alternative for the management of C. paliurus anthracnose. To our knowledge, this study provides the first report of C. aenigma, C. fructicola, and C. gloeosporioides s. s. causing C. paliurus anthracnose in China as well as in the world.
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