Essential plant oils in reducing the intensity of soft rot in Chinese cabbage

Guerra, Myrzânia de Lira; Guerra, Yrlânia de Lira; Souza, Elineide Barbosa de; Mariano, Rosa de Lima Ramos

doi:10.1590/s1806-66902014000400014

Cited by 4 publications

(6 citation statements)

References 11 publications

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“…EOs employed in phytopathogen control are generally used at concentrations ranging from 0.1 to 1% (ALVES et al 2014;GUERRA et al 2014;HUANG;LAKSHMAN, 2010;SILVA et al, 2012a). The higher these concentrations, the more phytotoxicity they might cause, which precludes their use in the alternative control of plant diseases.…”

Section: Resultsmentioning

confidence: 99%

“…This chemical composition might be determined by cultivation conditions, climate, extraction method, harvest time, and organ harvested (BURT, 2004;FALEIRO et al, 2003), and a different chemical composition might take on different bioactive properties (TORRAS et al, 2007). Guerra et al (2014) and Silva et al (2012a) did not observe a direct effect of sweet orange (Citrus sinensis L.) oil at a 0.5% concentration on Pcc. These results corroborate those obtained for sour orange oil at 0.75% in our study.…”

Section: Resultsmentioning

confidence: 99%

“…To determine potential phytotoxicity and choose the concentrations to be used, the 10 EOs were previously tested at concentrations of 0; 0.25; 0.50; 0.75 and 1.00%, obtained by dilution in sterilized distilled water (SDW) mixed with Tween 20 (1:1). development or color up to 48 hours after treatment application (GUERRA et al, 2014). Experiments were carried out in a completely randomized factorial block design 10 x 5, comprised of 10 OEs and five concentrations.…”

Section: Essential Oils (Eos) and Test For Phytotoxicitymentioning

confidence: 99%

“…Several previous studies have shown that essential oils can be used in the management of soft rot caused by Pectobacterium species, such as P. carotovorum subsp. carotovorum (Jones) Haubenet al (Pcc) in chinese cabbage (GUERRA et al, 2014) and lettuce (Lactuca sativa L.) (SILVA et al, 2012a). Positive in vitro results of essential oils were also obtained for Pcc (COSTA et al 2008a;2008b;FERNÁNDEZ et al 2014;JEONG et al 2009;SOTELO-BOYÁS et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Essential oils in the management of soft rot of kale in the brazilian semiarid region

et al. 2020

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The aim of this study was to analyze the effect of essential oils on the control of soft rot of kale. Clove essential oil at 0.25%, lemongrass and palmarosa essential oils at 0.5%, melaleuca and orange essential oils at 0.75%, bergamot, rosemary, sage and ginger essential oils at 1% were evaluated for the in vitro inhibition of Pectobacterium carotovorum subsp. brasiliensis (Pcb) and control of soft rot of kale, sprayed 72 hours before or seven hours after inoculation. Clove, citronella, bergamot, rosemary, palmarosa, sage, melaleuca, and lemongrass oils completely inhibited the growth of Pcb. Lemongrass oil (0.5%) caused 0% of disease incidence (INC), providing 100% of disease control in both periods of inoculation. Clove oil (0.25%) showed a lower INC (25%) when applied after inoculation, providing a control percentage of 71.42%. The lemongrass and clove essential oils were analyzed by GC/FID (Gas Chromatography – Flame Ionization Detector) and by GC/MS (Gas Chromatography /Mass Spectrometer). The major components were eugenol (91,9%) for clove oil and citral, isometric mixture of neral (34,1%) and geranial (42,9%) for lemongrass oil. The Minimum inhibitory concentration (MIC) of lemongrass, clove oils and their major components (citral and eugenol, respectively) was determined by using a broth macrodilution technique, as well as they were evaluated at different concentrations on the control of soft rot of kale, sprayed according descriptions above. The MIC was 0.03125% for citral, and 0.0625 and 0.125% for lemongrass and clove oils, respectively. Eugenol didn't show MIC. Lemongrass oil at 0.125% (post-inoculation) and citral at 0.125% (pre and post-inoculation) provided the highest percentages of disease control (33.33, 50, and 100%, respectively). Clove oil at 0.125% (post-inoculation) showed better effectiveness than eugenol (0.25%), providing a percentage of disease control of 16.67%. Lemongrass and clove essential oils were the most effective in control of soft rot of kale, suggesting that these oils have a potential to be used as antibacterial agents.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Essential Oils (Eos) and Test For Phytotoxicitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Essential oils in the management of soft rot of kale in the brazilian semiarid region

et al. 2020

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“…Já a área abaixo da curva de progresso da doença (AACPD) foi reduzida pelos óleos de bergamota cravo, citronela e melaleuca. Mais recentemente, Guerra et al (2014), avaliando o efeito de OEs na redução da podridão-mole em couve-chinesa, verificaram que os OEs de bergamota (Citrus bergamia Risso et Poiteau), capim-limão, copaíba (Copaifera officinalis), eucalipto citriodora, eucalipto globulus, ervadoce, gengibre, hortelã (Mentha piperita L.), laranja-doce, limão e sálvia-esclaréia reduziram significativamente o período de incubação e a área abaixo da curva de progresso da doença.…”

Section: Concentrações Crescimento (Log Ufc/ml) Bergamotaunclassified

Óleos Essenciais No Manejo Da Podridão Mole Em Pimentão / Essential Oils in the Management of Soft Rot in Bell Pepper

Almeida

Neto

Barroso

et al. 2020

BJD

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Susceptibility of Postharvest Pathogens to Esential Oils

Božík

Nový

Klouček

2017

Scientia Agriculturae Bohemica

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Antimicrobial volatile substances from plants represent alternatives to synthetic pesticides and food preservatives. In this study, the compositions of some essential oils were determined by gas chromatography with mass spectrometry, and the inhibitory properties of the essential oils and their components against the bacterial postharvest pathogens Pectobacterium carotovorum subsp. carotovorum (CCM 1008), Pseudomonas syringae (CCM 7018), Xanthomonas campestris (CCM 22) were determined by the microdilution method. Essential oils from oregano, cinnamon, lemongrass, lavender, clove, rosemary, tea tree, eucalyptus, garlic, and ginger and their components cinnamaldehyde, eugenol, thymol, and carvacrol were used in the tests. The essential oil components exhibited strong antibacterial activity against all tested bacteria. The oregano and cinnamon essential oils were most effective. The rosemary, lavender, tea tree, eucalyptus, garlic, and ginger oils were not effective at the tested concentrations. In conclusion, certain essential oils, particularly their components, are highly effective and could be used for the control of postharvest bacterial pathogens. affect a wide range of plant species, including several economically important plants. Pectobacterium carotovorum subsp. carotovorum is a Gram-negative, rod-shaped, fermentative bacterium that causes bacterial soft rot and other diseases of many plant species, including potato (Solanum tuberosum L.), pepper (Capsicum annuum L.), and cabbage (Brassica campestris L.) (A l a m s h a h i et al., 2010; Z h a o et al., 2013). Pseudomonas syringae is a Gram-negative polyphagous bacterium that usually survives as an epiphyte on host plants and becomes pathogenic under appropriate environmental conditions. This bacterium causes serious losses to stone fruits, in which it elicits a variety of symptoms, such as blossom blast, spur dieback, leaf necrosis, bark cankers, gummosis of woody tissues and bacterial spot (H u a n g , L a k s h m a n , 2010; K o k o s k o v a et al., 2011). Bacterial blight is usually caused by the Gram-negative rod-shaped bacterium Xanthomonas campestris. This seed-borne disease is characterized by necrotic lesions on leaves, stems, and/or fruits and affects cotton (Gossypium herbaceum L.), bean (Phaseolus vulgaris L.), and tomato (Lycopersicon esculentum Mill.) (S a t i s h et al., 1999; K o t a n et al., 2014).In addition to decreased yield, plant pathogens can cause significant losses during storage (K o t a n et al., 2014). Therefore, various treatments are applied to prevent postharvest pathogens from affecting the quality of stored products (M a h a j a n et al., 2014). Application of chemical pesticides can cause health hazards in animals and humans due to residual toxicity. Consequently, a number of synthetic pesticides have been banned (S a t i s h et al., 1999). Moreover, many plant pathogenic bacteria have acquired resistance to synthetic pesticides (K o t a n et al., 2014). Essential oils could be an alternative to synthetic pesticides (...

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Essential plant oils in reducing the intensity of soft rot in Chinese cabbage

Cited by 4 publications

References 11 publications

Essential oils in the management of soft rot of kale in the brazilian semiarid region

Essential oils in the management of soft rot of kale in the brazilian semiarid region

Óleos Essenciais No Manejo Da Podridão Mole Em Pimentão / Essential Oils in the Management of Soft Rot in Bell Pepper

Susceptibility of Postharvest Pathogens to Esential Oils

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