Óleos essenciais no controle da pinta bacteriana e na ativação de respostas bioquímicas em tomateiro

Silva, Érika Oliveira da; Alves, Eduardo; Ferreira, Thiago Costa; Albuquerque, Carlos Alberto Cavalcante De

doi:10.1590/0100-5405/2167

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…A eficácia de óleos essenciais inibindo o desenvolvimento de fitobactérias in vitro já foram descritas (10,11), no entanto, informações práticas aplicadas em sistemas de produção são escassas.…”

Section: Introductionunclassified

Intervalo de aplicação de óleos essenciais no controle da mancha bacteriana do tomateiro

Araújo

Tebaldi

2019

Summa phytopathol.

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RESUMO A mancha bacteriana do tomateiro, causada Xanthomonas spp. pode provocar perdas significativas na produção da cultura. O controle da doença é difícil e produtos alternativos devem ser avaliados. Portanto, os objetivos do trabalho foram avaliar a inibição do crescimento de Xanthomonas spp. in vitro e o intervalo de aplicação de óleos essenciais, no controle da mancha bacteriana do tomateiro. Para avaliação do halo de inibição do crescimento de Xanthomonas spp. in vitro foram empregados óleos essenciais de cravo da índia (Syzygium aromaticum) e erva cidreira (Melissa officinalis), Tween 20%, hidróxido de cobre e água. Para o controle da mancha bacteriana, plantas de tomate foram inicialmente pulverizadas com os produtos; três dias após foram inoculadas por aspersão com uma suspensão bacteriana (107 UFC mL-1), e a cada intervalo de 3, 6, 9 ou 12 dias, as plantas foram novamente pulverizadas com os produtos. A severidade da doença foi avaliada, calculando-se a área abaixo da curva de progresso da severidade da doença. Os óleos essenciais de cravo da índia e erva cidreira, e o hidróxido de cobre, nas concentrações 100 e 10% inibiram o crescimento de Xanthomonas spp. in vitro. Da mesma forma, os óleos essenciais quando aplicados em intervalos de três e seis dias reduziram a severidade da mancha bacteriana do tomateiro, sendo promissores no controle da doença.

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Section: Introductionunclassified

Intervalo de aplicação de óleos essenciais no controle da mancha bacteriana do tomateiro

Araújo

Tebaldi

2019

Summa phytopathol.

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“…In the last years plant essential oils have been extensively studied and are a promising alternative for plant disease management due to their antimicrobial properties (DEBERDT et al, 2018;SILVA et al, 2017). 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.…”

Section: Introductionmentioning

confidence: 99%

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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“…(Venturoso et al, 2011), to inhibit the development of several plant pathogens of a fungal nature. Silva et al (2017) and Kobayashi and Amaral, (2018), studied the use of different plant extracts in the control of Pseudomonas syringae pv. tomato-Pst and Alternaria solani.…”

Section: Introductionmentioning

confidence: 99%

Health quality and reduction of pathogenic transmission in tomato seeds using plant extracts

et al. 2019

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The objective of the present study was to assess the seed health quality, quantification of seed-seedling pathogen transmission and the effect of plant extracts in reducing plant pathogens in the seeds of the tomato varieties San Marzano and Ipa 6. For the seed health, the samples were disinfested, plated and assessed after seven days, according to the Brazilian Seed Analysis Rule. For the transmission rate, 12 trays were prepared with 100 seeds each and assessed at 7, 14 and 21 d.a.s. (days after seeding) using 100 seedlings. The plant (main root, stalk and leaves) tissues were plated in PDA culture medium and assessed after seven days of incubation. Aqueous extracts were prepared from cinnamon, basil, neem and eucalyptus with 0.5% concentration and the seeds were immersed in each solution for 10 minutes. Then, they plated and assessed after seven days. The health test showed that biggest incidences of Aspergillus fumigatus (26 %) and Aspergillus flavus (26 %) were occurred in the seeds of the varieties Ipa 6 and San Marzano, respectively. The fungi A. flavus, A. fumigatus, A. niger, R. stolonifer and Curvularia sp. were detected in quantification of transmission in the seeds of the two tomato varieties. The treatment with basil extract resulted in the least fungus incidence in the transmission quantification of ‘San Marzano’ tomato seeds, while on Ipa 6 seeds the eucalyptus treatment performed better. The interference of treatments was not observed in tomato seed germination. However, there was decrease in incident of pathogens in seeds treated with the plant extracts and different effects was observed based on type and species of the pathogen.

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Óleos essenciais no controle da pinta bacteriana e na ativação de respostas bioquímicas em tomateiro

Cited by 3 publications

References 21 publications

Intervalo de aplicação de óleos essenciais no controle da mancha bacteriana do tomateiro

Intervalo de aplicação de óleos essenciais no controle da mancha bacteriana do tomateiro

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

Health quality and reduction of pathogenic transmission in tomato seeds using plant extracts

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