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Wang T, Shi X, Wu Z, Zhang J, Hao J, Liu P, Liu X. Carboxylesterase and Cytochrome P450 Confer Metabolic Resistance Simultaneously to Azoxystrobin and Some Other Fungicides in Botrytis cinerea. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:9680-9690. [PMID: 38634420 DOI: 10.1021/acs.jafc.4c02409] [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: 04/19/2024]
Abstract
Plant pathogens have frequently shown multidrug resistance (MDR) in the field, often linked to efflux and sometimes metabolism of fungicides. To investigate the potential role of metabolic resistance in B. cinerea strains showing MDR, the azoxystrobin-sensitive strain B05.10 and -resistant strain Bc242 were treated with azoxystrobin. The degradation half-life of azoxystrobin in Bc242 (9.63 days) was shorter than that in B05.10 (28.88 days). Azoxystrobin acid, identified as a metabolite, exhibited significantly lower inhibition rates on colony and conidia (9.34 and 11.98%, respectively) than azoxystrobin. Bc242 exhibited higher expression levels of 34 cytochrome P450s (P450s) and 11 carboxylesterase genes (CarEs) compared to B05.10 according to RNA-seq analysis. The expression of P450 genes Bcin_02g01260 and Bcin_12g06380, along with the CarEs Bcin_12g06360 in Saccharomyces cerevisiae, resulted in reduced sensitivity to various fungicides, including azoxystrobin, kresoxim-methyl, pyraclostrobin, trifloxystrobin, iprodione, and carbendazim. Thus, the mechanism of B. cinerea MDR is linked to metabolism mediated by the CarE and P450 genes.
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Affiliation(s)
- Tingting Wang
- Department of Plant Pathology, China Agricultural University, Beijing 100193, China
| | - Xin Shi
- Department of Plant Pathology, China Agricultural University, Beijing 100193, China
| | - Zhaochen Wu
- Department of Plant Pathology, China Agricultural University, Beijing 100193, China
| | - Junting Zhang
- Department of Plant Pathology, China Agricultural University, Beijing 100193, China
| | - Jianjun Hao
- School of Food and Agriculture, University of Maine, Orono, Maine 04469, United States
| | - Pengfei Liu
- Department of Plant Pathology, China Agricultural University, Beijing 100193, China
| | - Xili Liu
- Department of Plant Pathology, China Agricultural University, Beijing 100193, China
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Deng Y, Wang T, Zhao P, Du Y, Zhang L, Qi Z, Ji M. Sensitivity to 12 Fungicides and Resistance Mechanism to Trifloxystrobin, Carbendazim, and Succinate Dehydrogenase Inhibitors in Cucumber Corynespora Leaf Spot ( Corynespora cassiicola). PLANT DISEASE 2023; 107:3783-3791. [PMID: 37189041 DOI: 10.1094/pdis-04-23-0615-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: 05/17/2023]
Abstract
Corynespora cassiicola is the causal agent of cucumber Corynespora leaf spot, which affects many economically important plant species. Chemical control of this disease is hampered by the common development of fungicide resistance. In this study, 100 isolates from Liaoning Province were collected, and their sensitivity to 12 fungicides was determined. All the isolates (100%) were resistant to trifloxystrobin and carbendazim, and 98% were resistant to fluopyram, boscalid, pydiflumetofen, isopyrazam, and fluxapyroxad. However, none were resistant to propiconazole, prochloraz, tebuconazole, difenoconazole, and fludioxonil. The Cytb gene of trifloxystrobin-resistant isolates encoded the G143A mutation, whereas the β-tubulin gene of carbendazim-resistant isolates encoded the E198A and E198A and M163I mutations. Mutations in SdhB-I280V, SdhC-S73P, SdhC-H134R, SdhD-D95E, and SdhD-G109V were associated with resistance to the succinate dehydrogenase inhibitors (SDHIs). Trifloxystrobin, carbendazim, and fluopyram were barely effective on the resistant isolates, whereas fludioxonil and prochloraz were effective on the isolates that were resistant to the quinone outside inhibitors (QoIs), SDHIs, and benzimidazoles. Ultimately, this study demonstrates that fungicide resistance seriously threatens the effective control of Corynespora leaf spot.
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Affiliation(s)
- Yunyan Deng
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Tao Wang
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Ping Zhao
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
- State Key Laboratory of the Discovery and Development of Novel Pesticide, Shenyang Sinochem Agrochemicals R&D Co., Ltd., Shenyang 110021, China
| | - Ying Du
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - LuLu Zhang
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Zhiqui Qi
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Mingshan Ji
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
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Mobasher Amini M, Mirzaei S, Heidari A. A growing threat: Investigating the high incidence of benzimidazole fungicides resistance in Iranian Botrytis cinerea isolates. PLoS One 2023; 18:e0294530. [PMID: 37988349 PMCID: PMC10662737 DOI: 10.1371/journal.pone.0294530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 11/02/2023] [Indexed: 11/23/2023] Open
Abstract
Effective management of fungicide application programs requires monitoring the profile of resistant populations of Botrytis cinerea, given its high-risk nature. This research aimed to examine the sensitivity of 200 B. cinerea isolates collected from different plant species and regions across Iran towards thiophanate-methyl and carbendazim fungicides. To distinguish between susceptible and resistant isolates, the discriminatory dose assay was employed, followed by the selection of representative isolates from each group for EC50 analysis. To identify potential modifications in codon 198 of the β-tubulin gene in B. cinerea resistant isolates, the researchers employed the PCR-RFLP diagnostic method. More than two-thirds of the isolates exhibited a varying degree of resistance to MBC fungicides, even in farms where the application of these fungicides had not taken place in recent years. After treatment with the BsaI enzyme, the PCR product of sensitive isolates displayed two bands measuring 98 and 371 bp, while only one band of 469 bp was identified in resistant isolates. The study also evaluated whether resistance to fungicides could affect the pathogenicity and mycelial growth of the isolates. The findings showed no significant difference between the resistant and sensitive groups in terms of these factors, indicating that resistance does not come at a cost to the pathogen's fitness. Considering the high incidence of resistance and the absence of negative consequences on fitness, it is recommended to exercise caution in the employment of benzimidazole fungicides as part of B. cinerea management strategies.
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Affiliation(s)
- Mohamad Mobasher Amini
- Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
| | - Soheila Mirzaei
- Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
| | - Ahmad Heidari
- Department of Pesticide Research, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
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Che X, Huang Y, Zhong K, Jia K, Wei Y, Meng Y, Yuan W, Lu H. Thiophanate-methyl induces notochord toxicity by activating the PI3K-mTOR pathway in zebrafish (Danio rerio) embryos. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 318:120861. [PMID: 36563988 DOI: 10.1016/j.envpol.2022.120861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 12/10/2022] [Accepted: 12/10/2022] [Indexed: 06/17/2023]
Abstract
Thiophanate-methyl (TM), a typical pesticide widely used worldwide, was detected in rivers, soil, fruits, and vegetables. Thus, it is urgent to identify the potential harm of TM residual to non-target organisms and its molecular mechanisms. We used zebrafish (Danio rerio) in this study to evaluate TM toxicity. TM exposure induced developmental toxicity, including inhibited hatchability, reduced heart rates, restrained spontaneous locomotion, and decreased body length. Furthermore, we observed obvious toxicity in the notochord and detected increased expression levels of notochord-related genes (shha, col2a, and tbxta) by in situ hybridization in zebrafish larvae. In addition, calcein staining, alkaline phosphatase (ALP) activity analysis, and anatomic analysis indicated that TM induced notochord toxicity. We used rescue experiments to verify whether the PI3K-mTOR pathway involved in the notochord development was the cause of notochord abnormalities. Rapamycin and LY294002 (an inhibitor of PI3K) relieve notochord toxicity caused by TM, including morphological abnormalities. In summary, TM might induce notochord toxicity by activating the PI3K-mTOR pathway in zebrafish.
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Affiliation(s)
- Xiaofang Che
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Yong Huang
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; College of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Keyuan Zhong
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Kun Jia
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - You Wei
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; College of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Yunlong Meng
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; College of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Wei Yuan
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China
| | - Huiqiang Lu
- Ganzhou Key Laboratory for Drug Screening and Discovery, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; Affiliated Hospital of Jinggangshan University, Center for Clinical Medicine Research of Jinggangshan University, China.
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Fan F, Li XB, Yang YY, Zhang JY, Zhu YX, Yin WX, Li GQ, Luo CX. Benzimidazole-Resistant Isolates with E198A/V/K Mutations in the β-Tubulin Gene Possess Different Fitness and Competitive Ability in Botrytis cinerea. PHYTOPATHOLOGY 2022; 112:2321-2328. [PMID: 35731021 DOI: 10.1094/phyto-04-22-0120-r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Previous studies in Botrytis cinerea showed that resistance to methyl benzimidazole carbamates (MBCs) was mainly related to E198A/V/K and F200Y mutations of the β-tubulin gene, and E198V was the dominant mutation in the resistant subpopulation in Hubei Province of China, indicating that resistant mutations might influence fitness. However, little is known about the effect of each E198A/V/K mutation on fitness. In this study, the fitness and competitive ability of isolates with E198A/V/K mutations were investigated. Results showed that E198A/V/K isolates and wild-type isolates shared similar fitness components in terms of virulence, sporulation, conidial germination, oxidative sensitivity, and sclerotial production and viability. However, slower mycelial growth at 4°C, higher sensitivity to 4% NaCl, and increased sclerotial production percentage at 4°C were observed in the isolates with E198V, E198K, and E198A mutations, respectively. Competitive analysis showed that the wild-type subpopulation became dominant after three disease cycles in the absence of fungicide selection pressure, whereas the resistant subpopulation seized the space of the sensitive subpopulation upon MBC application. Unexpectedly, the frequency of E198V isolates decreased dramatically after the first disease cycle with or without fungicide selection pressure. These results suggest that MBC-resistant isolates suffer little fitness penalty but possess competitive disadvantages in the absence of fungicide selection pressure. Under fungicide selection pressure, E198V isolates could not compete with E198A/K isolates. According to the current results, there is a great possibility that the E198V mutation will lose dominance in the future in China.
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Affiliation(s)
- Fei Fan
- Key Lab of Horticultural Plant Biology, Ministry of Education, and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xia-Bing Li
- Key Lab of Horticultural Plant Biology, Ministry of Education, and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yuan-Yuan Yang
- Key Lab of Horticultural Plant Biology, Ministry of Education, and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jing-Yue Zhang
- Key Lab of Horticultural Plant Biology, Ministry of Education, and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yong-Xu Zhu
- Key Lab of Horticultural Plant Biology, Ministry of Education, and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei-Xiao Yin
- College of Plant Science and Technology, and Hubei Key Lab of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China
| | - Guo-Qing Li
- College of Plant Science and Technology, and Hubei Key Lab of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China
| | - Chao-Xi Luo
- Key Lab of Horticultural Plant Biology, Ministry of Education, and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- College of Plant Science and Technology, and Hubei Key Lab of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China
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Makris G, Nikoloudakis N, Samaras A, Karaoglanidis GS, Kanetis LI. Under Pressure: A Comparative Study of Botrytis cinerea Populations from Conventional and Organic Farms in Cyprus and Greece. PHYTOPATHOLOGY 2022; 112:2236-2247. [PMID: 35671479 DOI: 10.1094/phyto-12-21-0510-r] [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: 06/15/2023]
Abstract
The highly heterogeneous nature of Botrytis cinerea provides adaptive benefits to variable environmental regimes. Disentangling pathogen population structure in anthropogenic agroecosystems is crucial to designing more effective management schemes. Herein, we studied how evolutionary forces exerted in different farming systems, in terms of agrochemicals-input, shape B. cinerea populations. In total, 360 B. cinerea isolates were collected from conventional and organic, strawberry and tomato farms in Cyprus and Greece. The occurrence and frequency of sensitivities to seven botryticides were estimated. Results highlighted widespread fungicide resistance in conventional farms since only 15.5% of the isolates were sensitive. A considerable frequency of fungicide-resistant isolates was also detected in the organic farms (14.9%). High resistance frequencies were observed for boscalid (67.7%), pyraclostrobin (67.3%), cyprodinil (65.9%), and thiophanate-methyl (61.4%) in conventional farms, while high levels of multiple fungicide resistance were also evident. Furthermore, B. cinerea isolates were genotyped using a set of seven microsatellite markers (simple sequence repeat [SSR] markers). Index of association analyses (Ia and rBarD) suggest asexual reproduction of the populations, even though the mating-type idiomorphs were equally distributed, indicating frequency-dependent selection. Fungicide resistance was correlated with farming systems across countries and crops, while SSRs were able to detect population structure associated with resistance to thiophanate-methyl, pyraclostrobin, boscalid, and cyprodinil. The expected heterozygosity in organic farms was significantly higher than in conventional, suggesting the absence of selective pressure that may change the allelic abundance in organic farms. However, genetic variance among strawberry and tomato populations was high, ranking host specificity higher than other selection forces studied.
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Affiliation(s)
- Georgios Makris
- Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Limassol, Cyprus
| | - Nikolaos Nikoloudakis
- Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Limassol, Cyprus
| | - Anastasios Samaras
- Department of Agriculture, Plant Pathology Laboratory, Aristotle University of Thessaloniki, Greece
| | - Georgios S Karaoglanidis
- Department of Agriculture, Plant Pathology Laboratory, Aristotle University of Thessaloniki, Greece
| | - Loukas I Kanetis
- Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Limassol, Cyprus
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Bebek Markovinović A, Putnik P, Duralija B, Krivohlavek A, Ivešić M, Mandić Andačić I, Palac Bešlić I, Pavlić B, Lorenzo JM, Bursać Kovačević D. Chemometric Valorization of Strawberry ( Fragaria x ananassa Duch.) cv. 'Albion' for the Production of Functional Juice: The Impact of Physicochemical, Toxicological, Sensory, and Bioactive Value. Foods 2022; 11:foods11050640. [PMID: 35267273 PMCID: PMC8909511 DOI: 10.3390/foods11050640] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/31/2022] [Accepted: 02/05/2022] [Indexed: 12/26/2022] Open
Abstract
Strawberries (Fragaria x ananassa Duch. cv. 'Albion') were harvested at two stages of ripeness (75% vs. 100%) and their physicochemical, sensory, toxicological, and bioactive properties were evaluated before and after processing into juice. The fresh fruits and their by-products were also evaluated. During processing into juice, the color change was higher in the fully ripe fruits, confirming the encouraging prospects for using the less ripe strawberries for processing. The analysis of heavy metals (Cu, Zn, Ni, As, Cd, Pb) was carried out, and in juice and by-product samples of 100% maturity, only Pb was higher than the MDK. Of the 566 pesticides analyzed, only cyprodinil was found in the by-products of the strawberries at 75% maturity, while pyrimethanil was detected in all samples. Fresh strawberries of both ripeness levels were rated similarly to the corresponding juices for all sensory attributes studied, indicating that sensory perception was not affected by processing. However, ripeness was found to be an important factor influencing most sensory attributes. The by-products were the materials with the highest levels of all bioactive compounds. Considering all quality parameters evaluated, the chemometric evaluation confirms the suitability of 75% ripe strawberries for processing into functional juice, which could be important for the juice industry.
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Affiliation(s)
- Anica Bebek Markovinović
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia;
| | - Predrag Putnik
- Department of Food Technology, University North, Trg dr. Žarka Dolinara 1, 48000 Koprivnica, Croatia
- Correspondence: (P.P.); (D.B.K.)
| | - Boris Duralija
- Department of Pomology, Division of Horticulture and Landscape Architecture, Faculty of Agriculture, University of Zagreb, Svetošimunska cesta 25, 10000 Zagreb, Croatia;
| | - Adela Krivohlavek
- Andrija Štampar Teaching Institute of Public Health, Mirogojska 16, 10000 Zagreb, Croatia; (A.K.); (M.I.); (I.M.A.); (I.P.B.)
| | - Martina Ivešić
- Andrija Štampar Teaching Institute of Public Health, Mirogojska 16, 10000 Zagreb, Croatia; (A.K.); (M.I.); (I.M.A.); (I.P.B.)
| | - Ivana Mandić Andačić
- Andrija Štampar Teaching Institute of Public Health, Mirogojska 16, 10000 Zagreb, Croatia; (A.K.); (M.I.); (I.M.A.); (I.P.B.)
| | - Iva Palac Bešlić
- Andrija Štampar Teaching Institute of Public Health, Mirogojska 16, 10000 Zagreb, Croatia; (A.K.); (M.I.); (I.M.A.); (I.P.B.)
| | - Branimir Pavlić
- Faculty of Technology, University of Novi Sad, Blvd. Cara Lazara 1, 21000 Novi Sad, Serbia;
| | - Jose Manuel Lorenzo
- Centro Tecnológico de la Carne de Galicia, Adva. Galicia n° 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain;
- Universidade de Vigo, Area de Tecnoloxia dos Alimentos, Facultad de Ciencias de Ourense, 32004 Ourense, Spain
| | - Danijela Bursać Kovačević
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia;
- Correspondence: (P.P.); (D.B.K.)
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Cordova LG, Dalla Lana F, Paul PA, Peres NA. A Quantitative Synthesis of the Efficacy and Profitability of Conventional and Biological Fungicides for Botrytis Fruit Rot Management on Strawberry in Florida. PLANT DISEASE 2019; 103:2505-2511. [PMID: 31408403 DOI: 10.1094/pdis-03-19-0453-re] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Botrytis fruit rot (BFR) is a major disease that affects strawberry production in Florida and worldwide. BFR management relies on frequent fungicide applications. A meta-analysis was conducted on the outcomes from nine field trials to evaluate the efficacy and profitability of conventional and biological fungicides compared with a nontreated control (NTC). All trials were conducted in Florida between the 2005/06 and 2016/17 growing seasons. Fungicide treatments were applied weekly, and plots were harvested twice a week for yield and BFR incidence quantification. Treatments were grouped into four categories: NTC, multisite only (Thiram), Standard (captan alternated with fludioxonil + cyprodinil), and Bacillus. Following primary analyses, a random effects network meta-analytical model was fitted to estimate the mean yield and BFR incidence responses for each treatment group and to compare means between pairs of groups. The Thiram and the Standard treatment groups increased yield by 378.8 and 502.2 kg/ha/week, respectively, compared with the NTC. The yield difference between Bacillus and NTC was not statistically significant. Besides increasing yield, Thiram and Standard also reduced BFR incidence by approximately 10% compared with the NTC. The mean yield responses and among-study variability from the meta-analysis were used to estimate the probability of a given yield response in a new future trial. The Standard and Thiram treatment groups showed higher estimated probabilities of increasing yield and resulting in a profitable return on application investments than the Bacillus group of treatments. The results from this study provide growers with information that will aid their decision-making process regarding BFR management.
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Affiliation(s)
- Leandro G Cordova
- University of Florida, Gulf Coast Research and Education Center, Wimauma, FL, 33598
| | - Felipe Dalla Lana
- Department of Plant Pathology, The Ohio State University, Wooster, OH 44691
| | - Pierce A Paul
- Department of Plant Pathology, The Ohio State University, Wooster, OH 44691
| | - Natalia A Peres
- University of Florida, Gulf Coast Research and Education Center, Wimauma, FL, 33598
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