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Efficacy of Chemical Preservatives to Control Perilla Rust
( Sharif M. Al-Reza ),( Cher Won Hwang ),( Sun Chul Kang ) 한국환경농학회 2010 한국환경농학회지 Vol.29 No.4
The rust fungi are biotrophic fungal pathogens that cause serious disease on Perilla leaves in Korea. The effect of some commonly used chemical preservatives (sorbic acid, D-sorbitol, propionic acid and benzoic acid) against Perilla rust was investigated in this study. Results of this investigation showed that all the preservatives were effective against Perilla rust except benzoic acid. There was no growth of rust spores on the Perilla leaves treated with 0.1% of preservative even after 21 days of preservation. However, 0.01% of preservative also showed remarkable reduction of rust spores on the Perilla leaves as compared to the control groups. Thus, the results of this study indicated that the chemical preservatives used might be useful to control the growth of rust fungi on Perilla leaves.
Al-Reza, Sharif M.,Rahman, Atiqur,Ahmed, Yunus,Kang, Sun Chul Elsevier 2010 Pesticide biochemistry and physiology Vol.96 No.2
<P><B>Abstract</B></P><P>The efficacy of the essential oil and various organic extracts from flowers of <I>Cestrum nocturnum</I> L. was evaluated for controlling the growth of some important phytopathogenic fungi. The oil (1000ppm) and the organic extracts (1500μg/disc) revealed antifungal effects against <I>Botrytis cinerea</I>, <I>Colletotrichum capsici</I>, <I>Fusarium oxysporum</I>, <I>Fusarium solani</I>, <I>Phytophthora capsici</I>, <I>Rhizoctonia solani</I> and <I>Sclerotinia sclerotiorum</I> in the growth inhibition range of 59.2–80.6% and 46.6–78.9%, respectively, and their MIC values were ranged from 62.5 to 500 and 125 to 1000μg/mL. The essential oil had a remarkable effect on spore germination of all the plant pathogens with concentration and time-dependent kinetic inhibition of <I>P. capsici</I>. Further, the oil displayed remarkable <I>in vivo</I> antifungal effect up to 82.4–100% disease suppression efficacy on greenhouse-grown pepper plants. The results obtained from this study may contribute to the development of new antifungal agents to protect the crops from fungal diseases.</P>
Efficacy of Chemical Preservatives to Control Perilla Rust
Al-Reza, Sharif M.,Hwang, Cher-Won,Kang, Sun-Chul The Korean Society of Environmental Agriculture 2010 한국환경농학회지 Vol.29 No.4
The rust fungi are biotrophic fungal pathogens that cause serious disease on Perilla leaves in Korea. The effect of some commonly used chemical preservatives (sorbic acid, D-sorbitol, propionic acid and benzoic acid) against Perilla rust was investigated in this study. Results of this investigation showed that all the preservatives were effective against Perilla rust except benzoic acid. There was no growth of rust spores on the Perilla leaves treated with 0.1% of preservative even after 21 days of preservation. However, 0.01% of preservative also showed remarkable reduction of rust spores on the Perilla leaves as compared to the control groups. Thus, the results of this study indicated that the chemical preservatives used might be useful to control the growth of rust fungi on Perilla leaves.
Al-Reza, Sharif M.,Rahman, Atiqur,Kang, Sun Chul Blackwell Publishing Ltd 2009 International journal of food science & technology Vol.44 No.6
<P>Summary</P><P>In this study, we examined the chemical compositions of essential oil and tested the efficacy of oil and organic extracts of <I>Cestrum nocturnum</I> L. against food-borne pathogens. The chemical compositions of the oil was analysed by gas chromatography-mass spectrometry (GC-MS). Forty-seven compounds representing 93.28% of the total oil were identified. The oil [5 &mgr;L of 1:5 (v/v) dilution of oil with methanol] and organic extracts of hexane, chloroform, ethyl acetate and methanol (300 &mgr;g per disc) of <I>C. nocturnum</I> displayed a great potential of antibacterial activity against <I>Staphylococcus aureus</I> (ATCC 6538 and KCTC 1916), <I>Listeria monocytogenes</I> (ATCC 19166 and ATCC 15313), <I>Bacillus subtilis</I> ATCC 6633, <I>Pseudomonas aeruginosa</I> KCTC 2004, <I>Salmonella typhimurium</I> KCTC 2515 and <I>Escherichia coli</I> ATCC 8739. Also the oil had strong detrimental effect on the viable count of the tested bacteria. The results obtained from this study may contribute to the development of new antimicrobial agents with potential applications in food industries as natural preservatives to control food-borne pathogens.</P>
Rahman, Atiqur,Al-Reza, Sharif M,Yoon, Jung In,Kang, Sun Chul John Wiley Sons, Ltd. 2009 Journal of the Science of Food and Agriculture Vol.89 No.5
<P>BACKGROUND:Poncirus trifoliata Rafin. is widely used in oriental medicine because of its beneficiary effects on health. In this study, we examined the chemical compositions of the volatile oil isolated from the seeds of P. trifoliata by hydrodistillation, and tested the efficacy of the oil and various organic extracts as an antibacterial potential against a panel of foodborne pathogens.</P><P>RESULTS: The hydrodistilled volatile oil was analysed by GC–MS. Thirty-six compounds representing 90.67% of the total oil were identified, of which veridiflorol, spathulenol, α-humulene, α-cadinol, δ-cadinene, T-muurolol, hexadecanoic acid, germacrene D, bergaptene and aromadendrene were the major volatile compounds. The oil and the organic extracts of chloroform, ethyl acetate and methanol revealed a remarkable antibacterial effect against the tested pathogens such as Staphylococcus aureus, Bacillus subtilis, Listeria monocytogenes, Pseudomonas aeruginosa, Enterobacter aerogenes, Salmonella typhimurium, S. enteritidis and Escherichia coli. Also, the oil had strong detrimental effect on the viable count of the tested bacteria.</P><P>CONCLUSION: Our findings demonstrate that the oil and organic extracts derived from P. trifoliata seeds might be a potential source of a preservative for the food or pharmaceutical industries. Copyright © 2009 Society of Chemical Industry</P>