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Liu H, An M, Si H, Shan Y, Xu C, Hu G, Xie Y, Liu D, Li S, Qiu R, Zhang C, Wu Y. Identification of Cyclic Dipeptides and a New Compound (6-(5-Hydroxy-6-methylheptyl)-5,6-dihydro-2H-pyran-2-one) Produced by Streptomyces fungicidicus against Alternaria solani. Molecules 2022; 27:molecules27175649. [PMID: 36080412 PMCID: PMC9458140 DOI: 10.3390/molecules27175649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 08/26/2022] [Accepted: 08/30/2022] [Indexed: 11/30/2022] Open
Abstract
As an important microbial resource, Actinomycetes, especially Streptomyces, have important application values in medicine and biotechnology. Streptomyces fungicidicus SYH3 was isolated from soil samples in tomato-growing areas and showed good inhibitory effects on Alternaria solani in tomato. To obtain pure active compounds, SYH3 fermentation broth was subjected to XAD-16 macroporous resin and silica gel column chromatography. Combined with the repeated preparation and separation of preparative high-performance liquid chromatography (HPLC), a total of four monomer compounds were obtained after activity tracking. Compound 4 was identified as a new six-membered lactone ring compound named 6-(5-hydroxy-6-methylheptyl)-5,6-dihydro-2H-pyran-2-one by 1D and 2D nuclear magnetic resonance (NMR) data and mass spectrometry (MS). The other three active compounds belong to the cyclodipeptide, and their half maximal inhibitory concentration (IC50) values against A. solani were 43.4, 42.9, and 30.6 μg/mL, respectively. Compound 4 significantly inhibited the spore germination and induced swollen and deformed local hyphae of A. solani with an IC50 value of 24.9 μg/mL. Compound 4 also had broad-spectrum antifungal activity and had a good antifungal effect on the tested plant-pathogenic fungi. The modes of action of new compound (4) still require further investigation, representing a novel and effective anti-fungal agent for future application.
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Affiliation(s)
- He Liu
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Mengnan An
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Hongyang Si
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Yuhang Shan
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Chuantao Xu
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
- Luzhou Branch of Sichuan Province Tobacco Company, Luzhou 646000, China
| | - Gang Hu
- Sichuan Province Tobacco Company, Chengdu 610017, China
| | - Yunbo Xie
- Sichuan Province Tobacco Company, Chengdu 610017, China
| | - Dongyang Liu
- Liangshanzhou Branch of Sichuan Province Tobacco Company, Xichang 615000, China
| | - Shujun Li
- Key Laboratory for Green Preservation & Control of Tobacco Diseases and Pests in Huanghuai Growing Area, Tobacco Research Institute, Henan Academy of Agricultural Sciences, Xuchang 461000, China
| | - Rui Qiu
- Key Laboratory for Green Preservation & Control of Tobacco Diseases and Pests in Huanghuai Growing Area, Tobacco Research Institute, Henan Academy of Agricultural Sciences, Xuchang 461000, China
| | - Chong Zhang
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
- Correspondence: (C.Z.); (Y.W.)
| | - Yuanhua Wu
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
- Correspondence: (C.Z.); (Y.W.)
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Kumar YB, Shabeer TPA, Jadhav M, Banerjee K, Hingmire S, Saha S, Rai AB. Analytical method validation, dissipation and safety evaluation of combination fungicides fenamidone + mancozeb and iprovalicarb + propineb in/on tomato. Journal of Food Science and Technology 2020; 57:2061-2069. [PMID: 32431332 DOI: 10.1007/s13197-020-04240-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 09/14/2019] [Accepted: 01/03/2020] [Indexed: 11/26/2022]
Abstract
Dissipation behavior and degradation kinetics of fenamidone + mancozeb (Sectin 60 WG) and iprovalicarb + propineb (Melody Duo 66.75 WP) in tomato were studied at recommended dose (RD) and double dose (DD) of application. The analysis of the field samples were carried out by employing liquid chromatography tandem mass spectrometry (LC-MS/MS) for fenamidone and iprovalicarb residues and gas chromatography mass spectrometry for mancozeb and propineb residues after thorough validation of the extraction methods. The dissipation of residues best followed 1st + 1st order for all the test fungicides. The half-life period for fenamidone, mancozeb, iprovalicarb and propineb were 2, 2, 1.5 and 2 days for RD and 3, 2.5, 2 and 3 days for DD, respectively. The pre-harvest intervals were not applicable for iprovalicarb, fenamidone and mancozeb (at RD) as the residues at 0 day were below maximum residue limit set by European Union, and it was 1 day for DD of iprovalicarb, 3.5 days for DD of fenamidone, 3 days for DD of mancozeb, 3 and 7 days for propineb at RD and DD, respectively. A PHI of 4 and 7 days are proposed for fenamidone + Mancozeb and iprovalicarb + propineb, respectively. Dietary exposure calculated for all the pesticides were safe on all the sampling days except for propineb residues for which it was safe after first day of the double dose application. The study will be useful for promoting effective residue management and safe use of these chemicals for controlling fungal diseases in tomato crop.
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Affiliation(s)
| | - T P Ahammed Shabeer
- 2National Referral Laboratory, ICAR-National Research Centre for Grapes, Pune, 412 307 India
| | - Manjusha Jadhav
- 2National Referral Laboratory, ICAR-National Research Centre for Grapes, Pune, 412 307 India
| | - Kaushik Banerjee
- 2National Referral Laboratory, ICAR-National Research Centre for Grapes, Pune, 412 307 India
| | - Sandip Hingmire
- 2National Referral Laboratory, ICAR-National Research Centre for Grapes, Pune, 412 307 India
| | - Sujoy Saha
- 1ICAR- Indian Institute of Vegetable Research (ICAR), Varanasi, 221305 India
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Dubey JK, Patyal SK, Katna S, Shandil D, Devi N, Singh G, Singh G. Persistence and dissipation kinetics of tebuconazole in apple, tomato, chilli and onion crops of Himachal Pradesh, India. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:11290-11302. [PMID: 31965494 DOI: 10.1007/s11356-020-07724-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 01/12/2020] [Indexed: 06/10/2023]
Abstract
Tebuconazole is a broad-spectrum fungicide extensively used worldwide for the control of many diseases such as powdery mildew and scab in apple, early blight of tomato, anthracnose of chilli, white rot and purple blotch of onion etc. Maximum residue level of this compound has not been worked out on these crops in India; the persistence and dissipation kinetics of tebuconazole on apple, tomato, chilli and onion were studied following three foliar applications of the formulation Folicur 430 SC at a standard dose (X) 322, 268.75, 215 and 215 g a.i./ha and at double dose (2X) 645, 537.5, 430 and 430 g a.i./ha, respectively, to work out the safe waiting periods and half-life period of tebuconazole. Extraction was done using QuEChERS method and cleanup by using dispersive solid-phase method. Tebuconazole residues were estimated on gas chromatograph-mass spectrometry (GC-MS). The recovery of tebuconazole in fortified matrix was above 90% with a limit of quantification (LOQ) at 0.05 mg kg-1. The initial deposits of tebuconazole on apple at two locations under study ranged from 1.986-2.011 mg kg-1at X dose to 3.698-3.843 mg kg-1 at 2X dose. The initial deposits in tomato, chilli and onion were 1.129, 1.760 and 1.169 mg kg-1 at X dose and 2.213, 2.784 and 2.340 mg kg-1, respectively at the 2X dose. Dissipation of the fungicide followed first-order of kinetics and the half life of degradation ranged from 1.30-2.25 days at X dose to 1.40-2.62 days at 2X days on different crops under study. Residues declined below the determination limit (LOQ) of 15 and 20 days after spraying, respectively, at X and 2X dose in apple; 7 and 10 days in tomato; 10 and 15 days in chilli and onion. Waiting periods of 5, 2, 7 and 12 days, respectively, are suggested for apple, tomato, chilli and onion at 2X dose.
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Affiliation(s)
- Jatiender Kumar Dubey
- Department of Entomology, Dr Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan, 173 230, India.
| | - Surender Kumar Patyal
- Department of Entomology, Dr Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan, 173 230, India
| | - Sapna Katna
- Department of Entomology, Dr Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan, 173 230, India
| | - Deepika Shandil
- Department of Entomology, Dr Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan, 173 230, India
| | - Nisha Devi
- Department of Entomology, Dr Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan, 173 230, India
| | - Gaganpreet Singh
- Department of Entomology, Dr Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan, 173 230, India
| | - Gagandeep Singh
- Department of Entomology, Dr Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan, 173 230, India
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Qu H, Zhao Y, Du S, Li P, Wu S. Role of solvent properties and composition on the solid-liquid equilibrium of trifloxystrobin and thermodynamic analysis. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111566] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Persistence, dissipation, and risk assessment of a combination formulation of trifloxystrobin and tebuconazole fungicides in/on tomato. Regul Toxicol Pharmacol 2019; 108:104471. [PMID: 31493441 DOI: 10.1016/j.yrtph.2019.104471] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 08/30/2019] [Accepted: 09/03/2019] [Indexed: 11/20/2022]
Abstract
Multi-locational supervised field trials were conducted in different agro-climatic regions in India to study dissipation of trifloxystrobin and tebuconazole in tomato after spraying a combination formulation (trifloxystrobin 25% + tebuconazole 50%, 75WG) at recommended doses: (i) single (trifloxystrobin 87.5 g a.i. ha-1 + tebuconazole 175 g a.i. ha-1) and (ii) double (trifloxystrobin 175 g a.i. ha-1 + tebuconazole 350 g a.i. ha-1). Fruit samples were extracted with ethyl acetate using a modified QuEChERS method. The residues (parent fungicides + metabolite) were analyzed and confirmed by GC-ECD and GC-MS, respectively. The half-life (t1/2) of trifloxystrobin and tebuconazole in tomato varied from 1.08 to 1.72 and 1.13 -to 1.64 days at single; and 1.27 to 2.13 and 1.24 to 1.96 days at double dose, respectively. Since maximum residue limit (MRL) at pre-harvest interval (PHI) of 5 days is impractical, as tomato is usually harvested and consumed almost everyday after the last spray, the risk assessment was performed at minimum PHI of 1 day. Accordingly, on the basis of supervised field trial data and using OECD MRL calculator, MRL of 0.5 and 1.5 mg kg-1 at single dose were proposed for trifloxystrobin and tebuconazole in/on tomato, respectively.
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Paramasivam M, Deepa M, Selvi C, Chandrasekaran S. Dissipation kinetics and safety evaluation of tebuconazole and trifloxystrobin in tea under tropical field conditions. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 34:2155-2163. [DOI: 10.1080/19440049.2017.1375606] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Mariappan Paramasivam
- Pesticide Toxicology Laboratory, Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, India
| | - Manthirachalam Deepa
- Pesticide Toxicology Laboratory, Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, India
| | - Chellamuthu Selvi
- Pesticide Toxicology Laboratory, Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, India
| | - Subramanian Chandrasekaran
- Pesticide Toxicology Laboratory, Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, India
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Paramasivam M, Selvi C, Deepa M, Jayaprakash SA, Chandrasekaran S. Simultaneous determination of tebuconazole, trifloxystrobin, and its metabolite trifloxystrobin acid residues in gherkin under field conditions. J Sep Sci 2015; 38:958-64. [DOI: 10.1002/jssc.201401022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 11/16/2014] [Accepted: 12/19/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Mariappan Paramasivam
- Pesticide Toxicology Laboratory; Department of Agricultural Entomology; Tamil Nadu Agricultural University; Coimbatore Tamil Nadu
| | - Chellamuthu Selvi
- Pesticide Toxicology Laboratory; Department of Agricultural Entomology; Tamil Nadu Agricultural University; Coimbatore Tamil Nadu
| | - Manthirachalam Deepa
- Pesticide Toxicology Laboratory; Department of Agricultural Entomology; Tamil Nadu Agricultural University; Coimbatore Tamil Nadu
| | - Samiyannan A. Jayaprakash
- Pesticide Toxicology Laboratory; Department of Agricultural Entomology; Tamil Nadu Agricultural University; Coimbatore Tamil Nadu
| | - Subramanian Chandrasekaran
- Pesticide Toxicology Laboratory; Department of Agricultural Entomology; Tamil Nadu Agricultural University; Coimbatore Tamil Nadu
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