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Storage and Preservation of Carica papaya Using Composite Fungicidal Coatings
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作者 Xiulan WU Shixin HE +4 位作者 Junjie HE Xichun ZHENG Meijun YE Xinjun WU Wenwu TANG 《Plant Diseases and Pests》 2024年第5期24-28,共5页
[Objectives]The paper was to investigate a method for the storage and preservation of Carica papaya utilizing chemical fungicides and composite biological coatings.[Methods]C.papaya fruits with red pulp sourced from L... [Objectives]The paper was to investigate a method for the storage and preservation of Carica papaya utilizing chemical fungicides and composite biological coatings.[Methods]C.papaya fruits with red pulp sourced from Lianjiang were utilized as test materials.The fruit epidermis was subjected to treatment with composite fungicidal coatings at ambient temperature,and the nutritional and physiological indicators of the fruits were measured at regular intervals.[Results]Under ambient temperature conditions,a chemical fungicide composite consisting of 300 mg/L fludioxonil and 250 mg/L propiconazole was employed to soak the fruits for a duration of 2 min.Subsequently,a composite biological coating formulated with 8 g/L KGM and 1.0%Zein at a pH of 7.0 was applied to the fruits.This treatment effectively inhibited the decline in the content of total soluble solids(TSS)and vitamin C(V C)in C.papaya,reduced the weight loss rate and the decay index,and enhanced the yellow ripening index.[Conclusions]This study establishes a foundation for the advancement of additional methods and techniques for the storage and preservation of C.papaya. 展开更多
关键词 Composite fungicidal coating Carica papaya Storage and preservation
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Controlled-Release of Plant Volatiles:New Composite Materials of Porous Carbon-Citral and Their Fungicidal Activity against Exobasidium vexans 被引量:1
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作者 Yaoguo Liu Yao Chen +5 位作者 Huifang Liu Wei Chen Zhiwei Lei Chiyu Ma Jie Yin Wen Yang 《Journal of Renewable Materials》 SCIE EI 2023年第2期811-823,共13页
Citral(Eo)exhibits excellent fungicidal activities.However,it is difficult to maintain long-term fungicidal activity due to its strong volatility.Herein,a controlled-release strategy by using biomass-derived porous ca... Citral(Eo)exhibits excellent fungicidal activities.However,it is difficult to maintain long-term fungicidal activity due to its strong volatility.Herein,a controlled-release strategy by using biomass-derived porous carbon(BC)was developed to overcome the drawback of Eo.New composite materials were prepared by loading Eo on tea stem porous carbon(BC@Eo),and their controlled-release fungicidal activity against Exobasidium vexans was assessed.BC with a large specific surface area of 1001.6 m2/g and mesoporous structure was fabricated through carbonization tempera-ture of 700℃.The BC@Eo materials were characterized using Fourier-transform infrared spectroscopy and X-ray powder diffraction.The results suggested that chemical and physical interactions occurred in BC@Eo.The Eo release profile suggested a biphasic pattern with an initial fast release on days 1–14 and a subsequent controlled phase on days 14–30.The in vitro cumulative release percentage of Eo from BC@Eo was 51%during one month,and this result was significantly lower than that from free Eo(cumulative release percentage of Eo of 82%in one week).The anti-fungal activities of Eo and BC@Eo against E.vexans were determined using the inhibition zone method.The results indicated that Eo and BC@Eo formed large inhibition zones of 19.66±0.79 and 21.92±0.77 mm,respectively.The influence on the hyphal structure of E.vexans was observed by scanning electron microscopy on day 30.The hyphal structure of E.vexans treated with BC@Eo was more shrunken than that treated with Eo at 30 days,suggesting that BC@Eo prolongs the fungicidal activity against E.vexans.This study demonstrated that the encapsulation of Eo in BC for developing the BC@Eo materials could be a promising strategy to inhibit volatility and maintain the fungicidal activity of Eo and provide a potential alternative for the reuse of abundant tea biomass waste resources. 展开更多
关键词 Exobasidium vexans porous carbon CITRAL controlled release fungicidal activity
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Determination of Fungicidal Activities of Six Antagonistic Actinomycetes in Soil and Their Preliminary Identification 被引量:1
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作者 龙建友 夏建荣 《Plant Diseases and Pests》 CAS 2011年第1期53-55,66,共4页
[ Objective] The paper was to preliminarily identify the species of six actinomyeetes strains, and to determine the fungicidal activities of their fermenta- tion products. E Method ] The species of six aefinomyeetes s... [ Objective] The paper was to preliminarily identify the species of six actinomyeetes strains, and to determine the fungicidal activities of their fermenta- tion products. E Method ] The species of six aefinomyeetes strains were identified by morphological method, and the fungicidal activities of the fermentation products of six aetinomycetes strains were systematically determined by series of methods including mycellal growth rate inhibition method, spore germination method, potting and field test. []Result] Morphological identification results showed that six strains belonged to Streptornyces. Biological determination results indicated that the in- hibition rates of the fermentation products of six actinomycetes strains with the concentration of 500μg/nd against the mycelial growth of Fusar/um oxysporum f. sp. Vasinfeetum were all greater than 90% ; the inhibition rates against the myeelial growth of Botrytis cinerea Pers. , A/ternar/a a/zernate and Fusarium oxysporum were also greater than 80%. The inhibition rates of the fermentation products of GZ-204 and GZ-331 strains against the spore germination of Bipolaria sorokiniana and Cercospora sorghl were 97. 8% , 98.2%, 99.5% and 94.6%, respectively. Potting test showed that the protection effects of the fermentation products of GZ-204 and GZ-331 strains on wheat powdery mildew(Erysiphe graminis) were 78.8% and 87.1% , and their cure effects were 62.4% and 68.5% , respectively. Field test showed that the control effects of 200 times fermentation liquids of GZ-204 and GZ-331 strains on wheat powdery mildew were 50.5% and 69. 2%, respective- ly. [Condusion] The research provided the reference for the development of new pesticides with actinomyeetes as the resource. 展开更多
关键词 ACTINOMYCETES SCREENING fungicidal activity BIOASSAY
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Synthesis and fungicidal activity of novel strobilurin analogues containing substituted N-phenylpyrimidin-2-amines 被引量:4
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作者 Hui Chao Li Bao Shan Chai +2 位作者 Zhi Nian Li Ji Chun Yang Chang Ling Liu 《Chinese Chemical Letters》 SCIE CAS CSCD 2009年第11期1287-1290,共4页
A number of novel strobilurin analogues containing substituted N-phenylpyrimidin-2-amines were synthesized. The structures of these new compounds were confirmed by ^1H NMR, IR and elemental analysis. Biological evalua... A number of novel strobilurin analogues containing substituted N-phenylpyrimidin-2-amines were synthesized. The structures of these new compounds were confirmed by ^1H NMR, IR and elemental analysis. Biological evaluation in the greenhouse showed several compounds have good fungicidal activities at 25 mg/L. 展开更多
关键词 N-Phenylpyrimidin-2-amine STROBILURIN SYNTHESIS fungicidal activity
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Synthesis and Fungicidal Activities of 2-Alkylthio-5-(3,4,5-tribenzyloxyphenyl)-1,3,4-oxadiazoles 被引量:3
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作者 De Qing LONG De Jiang LI +1 位作者 Wei Quan CAI Sheng Sheng CHEN 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第11期1427-1430,共4页
Abstract: Ten novel 2-alkylthio-5-(3, 4, 5-tribenzyloxyphenyl)-1, 3, 4-oxadiazole derivatives (5a-j) were synthesized from methyl 3, 4, 5-trihydroxybenzoate by ethedfication, hydrazidation, cyclization and thioet... Abstract: Ten novel 2-alkylthio-5-(3, 4, 5-tribenzyloxyphenyl)-1, 3, 4-oxadiazole derivatives (5a-j) were synthesized from methyl 3, 4, 5-trihydroxybenzoate by ethedfication, hydrazidation, cyclization and thioetherification reactions. The structures of 5a-j were confirmed by 1HNMR, MS spectra and elemental analysis. The results indicated that most of the compounds 5 exhibited good fungicidal activities. The activity of 5h is higher than 90% against Fusarium oxysporum and Botrytis cinereapers in 50 mg/L. 展开更多
关键词 1 3 4-Oxadiazole derivatives SYNTHESIS fungicidal activity.
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Synthesis, Crystal Structure and Fungicidal Activity of 3-(Difluoromethyl)-1-methyl-N-((2-(trifluoromethyl)phenyl) carbamoyl)-1H-pyrazole-4-carboxamide 被引量:2
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作者 SUN Na-Bo ZHAI Zhi-Wen +4 位作者 TONG Jian-Ying CAI Peng-Peng HE Fang-Yue HAN Liang LIU Xing-Hai 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第5期706-712,668,共8页
The title compound 3-(difluoromethyl)-1-methyl-N-((2-(trifluoromethyl)phenyl)-carbamoyl)-1 H-pyrazole-4-carboxamide(C14 H11 F5 N4 O2) was synthesized, and its structure was confirmed by 1 H NMR, H RMS and X-ra... The title compound 3-(difluoromethyl)-1-methyl-N-((2-(trifluoromethyl)phenyl)-carbamoyl)-1 H-pyrazole-4-carboxamide(C14 H11 F5 N4 O2) was synthesized, and its structure was confirmed by 1 H NMR, H RMS and X-ray diffraction. It crystallizes in monoclinic system, space group P21/n with a = 6.994(3), b = 13.860(6), c = 15.308(7) ?, β = 97.632(6)°, V = 1470.8(11) ?3,Z = 4, the final R = 0.0692 and wR = 0.2108 for 3989 observed reflections with Ⅰ > 2σ(Ⅰ). The preliminary biological test shows that the title compound has moderate fungicidal activities against Pseudomonas syringae. 展开更多
关键词 PYRAZOLE ACYL urea SYNTHESIS crystal structure fungicidal activities
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Synthesis, Crystal Structure and Fungicidal Activity of N-(4-tert-buty)-5-(1,2,4-triazol-1-yl)thiazol-2-yl)propionamide 被引量:3
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作者 叶姣 孙晓潇 +1 位作者 邱慎意 胡艾希 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第3期429-433,共5页
The title compound has been synthesized by the reaction of 4-tert-butyl-5-(1,2,4- triazol-1-yl)-2-aminothiazole with propionic anhydride, and its crystal structure was determined by single-crystal X-ray diffraction.... The title compound has been synthesized by the reaction of 4-tert-butyl-5-(1,2,4- triazol-1-yl)-2-aminothiazole with propionic anhydride, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the orthorhombic system, space group Pbca with α = 18.441(2), b = 8.3284(9), c = 19.257(2) A, Z = 8, V = 2957.5(5) A3, Mr = 279.37, Dc = 1.255 mg/m3, S = 1.033, μ =0.219 mm^-1, F(000) = 1184, the final R = 0.0349 and wR = 0.0876 for 2629 observed reflections (I 〉 2σ(I)). X-ray crystal structure presents the intermolecular N–H···N hydrogen bond, which plays an important role in stabilizing the crystal structure. The preliminary bioassay indicates that the title compound exhibits potent fungicidal activity against R. Solani (25 mg/L) with inhibition rate of 80.0%. 展开更多
关键词 N-( 4-tert-buty)-5-(1 2 4-triazoi- l-yl)thiazol-2-yl)propionamide SYNTHESIS crystal structure fungicidal activity
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Synthesis, Crystal Structure and Fungicidal Activity of (Z)-3,3-Dimethyl-1-(1H-1,2,4-triazol-1-yl)butan-2-one O-2-Chlorobenzyl Oxime Nitrate 被引量:2
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作者 叶姣 玄文静 胡艾希 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第9期1265-1268,共4页
The title compound has been synthesized by the reaction of 3,3-dimethyl-1-(1H-1,2,4-triazol-1-yl)butan-2-one oxime with 2-chlorobenzyl chloride, and then treated with 65~68% HNO3. Its crystal structure was determin... The title compound has been synthesized by the reaction of 3,3-dimethyl-1-(1H-1,2,4-triazol-1-yl)butan-2-one oxime with 2-chlorobenzyl chloride, and then treated with 65~68% HNO3. Its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/c with a = 14.5481(8), b = 9.3351(5), c = 13.1911(7) , β = 98.9450(10)°, Z = 4, V = 1769.67(17) 3, Mr = 369.81, Dc = 1.388 g/cm3, S = 1.06, μ = 0.247 mm-1, F(000) = 776, the final R = 0.0352 and wR = 0.0960 for 3069 observed reflections (I 2σ(I)). X-ray crystal structure presents the intramolecular N–H…O hydrogen bond. The packing is nearly parallel without π-π stacking interactions between two adjacent phenyl rings and stabilized by Van der Waals force. The preliminary bioassay shows that the title compound possesses fungicidal activity against Gibberella zeae at the dosage of 25 mg/L. 展开更多
关键词 (Z)-3 3-dimethyl-1-(1H-1 2 4-triazol-1-yl)butan-2-one O-2-chlorobenzyl oxime nitrate crystal structure synthesis fungicidal activity
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Synthesis,Crystal Structure and Fungicidal Activity of(E)-2-[(4-tert-Butyl-5-(4-methoxybenzyl)thiazol-2-ylimino)methyl]phenol 被引量:2
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作者 胡艾希 曹高 +2 位作者 马颍绮 张建宇 欧晓明 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第10期1235-1239,共5页
The title compound (E)-2-[(4-tert-butyl-5-(4-methoxybenzyl)thiazol-2-ylimino)methyl]phenol was synthesized by the reaction of 5-(4-methoxybenzyl)-4-tert- butylthiazol-2-amine with salicylaldehyde, and its crys... The title compound (E)-2-[(4-tert-butyl-5-(4-methoxybenzyl)thiazol-2-ylimino)methyl]phenol was synthesized by the reaction of 5-(4-methoxybenzyl)-4-tert- butylthiazol-2-amine with salicylaldehyde, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/c with a = 5.9362(8), b = 11.5070(15), c = 29.460(4)A, β= 97.326(3)°, V = 1995.9(5) A^3, Z = 4, F(000) = 808, C22H24N2O2S, Mr= 380.49, De= 1.266 g/cm^3, S = 1.031,μ = 0.181 mm^-1, the final R = 0.0474 and wR = 0.1441 for 4327 observed reflections (I 〉 2σ(I)). Intramolecular O-H…N hydrogen bond is observed in the crystal. The preliminary bioassay showed that the title compound exhibits 95% inhibition rate against Rhizoctonia solani at the test concentration of 500 mg/L. 展开更多
关键词 crystal structure SYNTHESIS fungicidal activity (E)-2- [(4-tert-butyl-5-(4-methoxybenzyl)thiazol-2-ylimino)methyl]phenol
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Synthesis, Crystal Structure and Fungicidal Activity of 3-(4-Chloro-3-ethyl-1-methyl-1H-pyrazol-5-yl)-6-(E)phenylvinyltriazolo[3,4-b]-1,3,4-thiadiazole 被引量:1
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作者 陈寒松 王宏根 《Chinese Journal of Structural Chemistry》 CSCD 2000年第5期317-321,共5页
The crystal structure of the title compound 3 (4 Chloro 3 ethyl 1 methyl 1H pyrazol 5 yl) 6 (E)phenylvinyltriazolo[3,4 b] 1,3,4 thiadiazole (C 17 H 15 ClN 6S, M r =370.87) was determined by... The crystal structure of the title compound 3 (4 Chloro 3 ethyl 1 methyl 1H pyrazol 5 yl) 6 (E)phenylvinyltriazolo[3,4 b] 1,3,4 thiadiazole (C 17 H 15 ClN 6S, M r =370.87) was determined by single crystal X ray diffraction. The crystal is monoclinic, space group P2 1/n , a=10.862(2), b=11.541(2), c=14\^994(3), β=108.41(3)°, V=1783(1), Z=4, D x =1.381 g/cm -3 , μ =0.3361 mm -1 , and F (000)=768. The results confirmed that the title compound belongs to type E of stereochemistry. The dihedral angle between triazole and 1,3,4 thiadiaole ring is 3° and the torsion angle between 1,3,4 thiadiazole and pyrazole ring is 134.0°. 展开更多
关键词 crystal structure PYRAZOLE triazole[3 4 b] 1 3 4 thiadiazole fungicidal activity
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The severity and cause of leaf spot disease of Pongamia pinnata L. and fungicidal control of the pathogen
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作者 M.A.U. Mridha F. Jabbar +3 位作者 M. K. Bhuiyan M, Rahman F. Akter S. Dewan 《Journal of Forestry Research》 SCIE CAS CSCD 2007年第3期236-240,共5页
A survey on the symptom and severity of the leaf spot disease of Pongamia pinnata L. was conducted in the nurseries of the Institute of Forestry and Environmental Sciences, University of Chittagong (IFESCU), Banglad... A survey on the symptom and severity of the leaf spot disease of Pongamia pinnata L. was conducted in the nurseries of the Institute of Forestry and Environmental Sciences, University of Chittagong (IFESCU), Bangladesh Forest Research Institute (BFRI) and Aronnak Nursery in Chittagong. The highest infection percentage and disease index were found in IFESCU nursery, followed by BFRI and the lowest was recorded in Aronnak nursery. The associated organism of leaf spot disease of P. pinnata was isolated from the diseased plant parts and the pathogenicity was established with the isolated fungus. Colletorichum gloeosprioides Penz was proved to be pathogenic. The inhibition of mycelial growth of C. gloeosporioides was observed and identified as suitable fungicides (Bavistin, Cupravite and Dithane M-45) and doses (0.05, 0.10, 0.50, 1.00, 1.50 and 2.00). The lowest and highest mycelial growth were respectively found on Bavistin and on Cupravite at the concentration of 0.05 after 8th day of incubation. It indicates that out of the three tested fungicides, Bavistin showed most effective, followed by Diathane M-45, and Cupravite was ineffective for its very little inhibition on mycelial growth. 展开更多
关键词 SEVERITY Leaf spot Pongamia pinnata fungicidal control
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Comparison of Fungicidal Difference of Two Arylpyrazoles Based on the Crystal Structures, Density Functional Theory Calculation and Molecular Docking
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作者 LIU Yuan-Yuan LI Yi LV Kun-Zhi 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第11期1845-1856,共12页
Two arylpyrazoles I andⅡwere synthesized and characterized by NMR and single-crystal X-ray diffraction.Compound I displayed 71.4%fungicidal inhibition rate against Rhizoctonia solani at 0.1 ppm,better than the contro... Two arylpyrazoles I andⅡwere synthesized and characterized by NMR and single-crystal X-ray diffraction.Compound I displayed 71.4%fungicidal inhibition rate against Rhizoctonia solani at 0.1 ppm,better than the control pyraclostrobin,whereasⅡhad little activity.Their fungicidal difference was discussed from theoretic level based on the crystal structure,density functional theory(DFT)calculation and molecular docking.The B3 LYP/6-31G^**level was employed to explore the HOMO-LUMO energy gap and charge distribution.Molecular docking was performed on the probable target protein bc1-enzyme complex.DFT calculation and docking studies supported the in vitro findings. 展开更多
关键词 arylpyrazole fungicidal DIFFERENCE CRYSTAL structure density functional theory calculation MOLECULAR DOCKING
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Synthesis, Crystal Structure and Fungicidal Activity of Ethyl 2-(3-(4-Fluorobenzamido)phenyl)-4-((4-fluorobenzoyl)oxy)thiazole-5-carboxylate
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作者 GUO Xiao-Feng SU Han-Xiang +3 位作者 FAN Zhi-Jin SUN Xue-Wen SUN Yao-Zheng QIN Zhong-Xiang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第6期923-929,共7页
The target compound, ethyl 2-(3-(4-fluorobenzamido)phenyl)-4-((4-fluorobenzoyl)oxy) thiazole-5-carboxylate, was synthesized by four-step procedures including N-protection, thionation, cyclization and acylation... The target compound, ethyl 2-(3-(4-fluorobenzamido)phenyl)-4-((4-fluorobenzoyl)oxy) thiazole-5-carboxylate, was synthesized by four-step procedures including N-protection, thionation, cyclization and acylation. Its structure was characterized by 1 H NMR, 13C NMR, HRMS and single-crystal X-ray diffraction. The target compound crystallizes as monoclinic crystal system, space group C2/c with a = 9.6097(19), b = 14.246(3), c = 33.070(7) ?, V = 4515.1(16) ?3, Z = 8, Dc = 1.496 Mg/m3, F(000) = 2096 and μ = 0.203 mm-1. There are 21864 reflections measured(4.94≤2θ≤55.96°), of which 5357 were unique(Rint = 0.1418) and used in all calculations. The final R = 0.0581(I > 2σ(I)) and wR = 0.1453(reflections). The target compound showed over 50% of growth inhibition against Physalospora piricola, Rhizoctonia cerealis and Sclerotinia sclerotiorum. 展开更多
关键词 THIAZOLE SYNTHESIS crystal structure fungicidal activity
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Synthesis and Fungicidal Activity of Chlorothalonil Derivatives
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作者 Han Jintao Li Jintao +1 位作者 Wang Yingxiu Jiang Aizhong 《Plant Diseases and Pests》 CAS 2020年第3期15-17,27,共4页
[Objective]The paper was to develop a novel fungicide with high efficacy and low toxicity.[Method]Chlorothalonil was used as the parent structure,and its 4-position substituent was converted to amino group.Totally 12 ... [Objective]The paper was to develop a novel fungicide with high efficacy and low toxicity.[Method]Chlorothalonil was used as the parent structure,and its 4-position substituent was converted to amino group.Totally 12 amide compounds not reported in the literature were designed and synthesized.Their structures were conformed by 1H NMR.[Result]The preliminary bioassay test showed that compounds JTCN-01,JTCN-05 and JTCN-07 had good control effect on corn rust at the concentration of 200 mg/L,and the control effect of compound JTCN-05 reached 95%.[Conclusion]Some chlorothalonil derivatives had the potential for further development. 展开更多
关键词 CHLOROTHALONIL Novel compound SYNTHESIS fungicidal activity
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Green Synthesis of Silver Nanoparticles with High Fungicidal Activity from Olive Seed Extract
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作者 Habeeb Khadri Mohammad Alzohairy +2 位作者 Avilala Janardhan Arthala Praveen Kumar Golla Narasimha 《Advances in Nanoparticles》 2013年第3期241-246,共6页
Silver nanoparticles in the form of silver based chemicals trace back their origin to time immemorial since the dilute forms of silver nitrate were used in place of antibiotics before they dominated the field of medic... Silver nanoparticles in the form of silver based chemicals trace back their origin to time immemorial since the dilute forms of silver nitrate were used in place of antibiotics before they dominated the field of medicine. But, it has now become necessary to explore the anti-microbial properties of silver based chemicals again due to the microbes gaining resistance against the wide range of present day antibiotics. The advancements in the field of medicine and technology started to coalesce to combat the adaptability of microbes as they successfully become tolerant to antibiotics and it manifested in the form a current technology, Nanomedicine. Nanomedicine deals about the medicines at a nano scale to rarefy the intensity of medicine to unaffected tissues and reduce the volume of medicine used. In the present context, our attempt is to develop potential anti-microbial particles in the form of silver nanoparticles by using the biological phenomena which we call Green synthesis an eco-friendly approach to conventional chemical synthesis. The enzymatic machinery of the olive seeds has been exploited to produce silver nanoparticles and test their efficacy as antifungal agents before we characterized their physical properties using UV-Vis, TEM, and FTIR analysis. The efficacy of these particles as antagonists on fungal pathogen Aspergillus niger a causative agent of Aspergillosis in human beings and is promising and they have a lot of scope for the purpose and hope the technology leads the next generation of anti-microbials. 展开更多
关键词 OLIVE SEEDS Silver Nanoparticles Characterization fungicidal Activity
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Synthesis and fungicidal activity of some sulphide derivatives of O-phenyl-N-substituted phenylcarbamates
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作者 F. E. Adelowo I. A. O. Ojo O. S. Amuda 《Advances in Biological Chemistry》 2011年第3期122-127,共6页
Monosulphides of O-phenyl-N-substituted phenylcar- bamates were prepared by the reaction between O- phenyl-N-substituted phenylcarbamates and sulph- ur dichloride while the corresponding disulphides were prepared by t... Monosulphides of O-phenyl-N-substituted phenylcar- bamates were prepared by the reaction between O- phenyl-N-substituted phenylcarbamates and sulph- ur dichloride while the corresponding disulphides were prepared by the reaction between O-phenyl-N- substituted phenylcarbamates and sulphur monoch- loride. The synthesized compounds were characte-rized by elemental analysis, thin layer chromatogra-phy (TLC), Fourier-transform infrared, 1H and 13C nuclear magnetic resonance spectroscopic techniques. In vitro fungicidal assay of these sulphides against Fusarium oxysporum, Aspergillus niger, Aspergillus flavus and Rhizopus stolonifer showed that they were more fungicidal than their parent carbamates. The synthesized sulphides were more active towards As-pergillus niger and Aspergillus flavus. There was little or no variations in the fungicidal activities of the synthesized monosulphides and disulphides of O-phen- yl-N-substituted phenyl carbamates. 展开更多
关键词 fungicidal Activity SULPHIDE DERIVATIVES SYNTHESIS
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Isolation and Identification of Cardenolide Compounds of Gomphocarpus sinaicus and Their Fungicidal Activity Against Soil Borne and Post Harvest Fungi
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作者 Moustafa A. Abbassy Ezzat A. Kadous EL-Sayed A.M. Abd-Allah Gehan I.Kh. Marei 《Journal of Life Sciences》 2012年第9期985-994,共10页
This study was undertaken to explore new antifungal compounds from the methanolic extract of G. sinaicus. Two cardenolide compounds were isolated and identified by GC-MS as cardenolide glycoside, 15-hydroxy-3,4,5,6-de... This study was undertaken to explore new antifungal compounds from the methanolic extract of G. sinaicus. Two cardenolide compounds were isolated and identified by GC-MS as cardenolide glycoside, 15-hydroxy-3,4,5,6-dehydrocalotropin and cardenolide genin, 3,4,5,6-dehydrocalotropagenin. The antifungal activity of these compounds was assessed. Results revealed that both compounds showed pronounced fungicidal activity against both soil borne fungi, R. solani, F. oxysporium, and postharvest fungi, R. stolonifer, P. digtatum, compared to the standard fungicides, flutolanil and copper oxychloride, respectively. The ECs0 values of the cardenolide genin were 0.703, 13.63 and 4.22, 8.403 lag/mL forR. solani, F. oxysporium andR. stolonifer, P. digtatum respectively. On the other hand, the ECs0 values of the standard fungicide, flutolanil, were 9.49 and 61.22 ~tg/mL against R. solani and F. oxysporium. While the ECso values of copper oxychloride were 279.94 and 187.13 p.g/mL against R. stolonifer and P. digtatum, respectively. The results showed that cellulase, PME, PPO of the tested fungi was more sensitive than to cardenolide genin. The strong antifungal activity of cardenolide genin reported in this study indicated that has a potential to be used as fungicides. 展开更多
关键词 Gomphocarpus sinaicus cardenolide glucosides fungicidal activity FUNGITOXICITY ENZYMES
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Bactericidal and Fungicidal Efficacy of Chlorine Dioxide in Various Workspaces
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作者 Jeffrey Driver Julie Lichterman +3 位作者 George Lukasik Shawn Jones Marie Bourgeois Raymond Harbison 《Occupational Diseases and Environmental Medicine》 2022年第2期49-59,共11页
Previously, we demonstrated the virucidal efficacy of low concentration chlorine dioxide (ClO<sub>2</sub>) gas in room settings. The purpose of these studies was to evaluate novel ClO<sub>2</sub&g... Previously, we demonstrated the virucidal efficacy of low concentration chlorine dioxide (ClO<sub>2</sub>) gas in room settings. The purpose of these studies was to evaluate novel ClO<sub>2</sub> formats as potential biocidal interventions for real world congregate settings and air systems. Three types of studies were conducted to determine the efficacy of ClO<sub>2</sub> in reducing bacteria and mold in various workspaces: hard and soft surfaces (gymnasium & equipment), aerosol (in-room), and within a laboratory environment. The study demonstrated that ClO<sub>2</sub> was highly effective against both bacteria and mold with reduction ranging from 85.0% - > 99.4% for bacteria and >99.4% for yeast and mold. Treatments on hard and soft surfaces (gymnasiums and sports equipment), reduced bacteria by an average of 90% - 95%. The following treatments were applied overnight: 1) hard surface spraying with dilute ClO<sub>2</sub> solutions, 2) carpet and tumbling treatments with powdered ClO<sub>2</sub> releasing impregnates, and 3) HVAC treatment and overall room deodorization with low dose ClO<sub>2</sub> gas from controlled releasing sachets. The in-room study treating air with a ClO<sub>2</sub> filtration media also indicated significant air and surface room efficacy, with an average of 94% reduction in bacteria after 24-hour, and 99.4% reduction in mold after 24-hours. In a related air study, a biological combination of Raoultella terrigena and Staphylococcus aureus was injected as a bio-aerosol into a 4-inch diameter pipe with air flowing at approximately 1200 ft/min. Dry ClO<sub>2</sub> gas was introduced into the air flow to achieve an effective concentration of 5 or 10 ppmv. Air samples were collected at sampling ports downstream from the fan at 10, 22, 55 and 100 ft along the pipe and used to evaluate changes in airborne bacteria and mold. Testing was conducted in a laboratory setting at ambient conditions. The data showed ClO<sub>2</sub> gas reduced viable organisms at both gas concentrations, and indicated that reductions were higher for 10 ppmv concentration, and longer pipe runs. In a final study, laboratory application of gaseous chlorine dioxide was tested. Low gas release filter testing demonstrated significant surface reductions of airborne bacteria with an overall average 99.4% reduction in the 24-hour testing period. Higher gas treatments of a class II biological cabinet reduced bacillus spores on steel coupons throughout cabinet by 6 log. ClO<sub>2</sub> was effective as a bactericidal and fungicidal treatment providing significant reduction in both surface and air. Novel product delivery forms may be useful for rapidly disinfecting air and solid surfaces in complex congregate settings. 展开更多
关键词 Chlorine Dioxide Bactericidal Activity fungicidal Activity
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New Fungicidally Active Pyrazolyl-Substituted 1,3,4-Thiadiazole Compounds and Their Preparation 被引量:1
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作者 Han Song CHEN Zheng Ming LI +1 位作者 Yu Feng HAN Zhong Wen WANG(State Key Laboratory of Elemento-Organic Chemistry,Institute of Elemento-Organic Chemistry. Nankai University. Tianjin 300071) 《Chinese Chemical Letters》 SCIE CAS CSCD 1999年第5期365-366,共2页
The potassium dithiocarbazate 2 was obtained through condensation of 5-pyrazole hydrazide 1 with carbon disulfide in ethanolic potassium hydroxide. and its cyclization gave 5-pyrazolyl-1,3,4-thiadiazole-2-thione 3 in ... The potassium dithiocarbazate 2 was obtained through condensation of 5-pyrazole hydrazide 1 with carbon disulfide in ethanolic potassium hydroxide. and its cyclization gave 5-pyrazolyl-1,3,4-thiadiazole-2-thione 3 in concentrated sulfuric acid. Alkylation of 3 yielded 2-alkylthio-5-pyrazolyl-1,3,4-thiadiazole 4. The preliminary bioassay tests indicated that compounds 3 and 4 have fungicidal activity. 展开更多
关键词 PYRAZOLE 1 3 4-THIADIAZOLE biheterocyclic compound FUNGICIDE
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Identification, pathogenicity, and fungicide sensitivity of Eutiarosporella dactylidis associated with leaf blight on maize in China 被引量:1
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作者 Cheng Guo Xiaojie Zhang +9 位作者 Baobao Wang Zhihuan Yang Jiping Li Shengjun Xu Chunming Wang Zhijie Guo Tianwang Zhou Liu Hong Xiaoming Wang Canxing Duan 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2024年第3期888-900,共13页
Maize(Zea mays L.) is an economically vital grain crop that is cultivated worldwide. In 2011, a maize foliar disease was detected in Lingtai and Lintao counties in Gansu Province, China. The characteristic signs and s... Maize(Zea mays L.) is an economically vital grain crop that is cultivated worldwide. In 2011, a maize foliar disease was detected in Lingtai and Lintao counties in Gansu Province, China. The characteristic signs and symptoms of this disease include irregular chlorotic lesions on the tips and edges of infected leaves and black punctate fruiting bodies in dead leaf tissues. Given favourable environmental conditions, this disease spread to areas surrounding Gansu. In this study, infected leaves were collected from Gansu and Ningxia Hui Autonomous Region between 2018and 2020 to identify the disease-causing pathogen. Based on morphological features, pathogenicity tests, and multilocus phylogenetic analysis involving internal transcribed spacer(ITS), 18S small subunit rDNA(SSU), 28S large subunit rDNA(LSU), translation elongation factor 1-alpha(TEF), and β-tubulin(TUB) sequences, Eutiarosporella dactylidis was identified as the causative pathogen of this newly discovered leaf blight. Furthermore, an in vitro bioassay was conducted on representative strains using six fungicides, and both fludioxonil and carbendazim were found to significantly inhibit the mycelial growth of E. dactylidis. The results of this study provide a reference for the detection and management of Eutiarosporella leaf blight. 展开更多
关键词 maize leaf blight MORPHOLOGY molecular phylogeny Eutiarosporella dactylidis fungicide sensitivity
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