Comparison of Biological and Chemical Treatments for Control of Bacterial Speck of Tomato Under Field Conditions in Morocco

Colin, J.; Chafik, Z.

doi:10.1094/pd-70-1048

Cited by 29 publications

(12 citation statements)

References 3 publications

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“…However, the rapid development of plasmid‐mediated copper tolerance is a major drawback for this control strategy (Bender and Cooksey ; Cuppels and Elmhirst ). The antibiotic streptomycin has been also used to control bacterial speck (Conlin and McCarter ; Colin and Chafik ), but with little success as resistance is common in pathogen populations (Scheck et al. ).…”

Section: Introductionmentioning

confidence: 99%

Bacillus subtilis QST 713 Confers Protection to Tomato Plants Against Pseudomonas syringae pv tomato and Induces Plant Defence‐related Genes

Fousia

Paplomatas

Tjamos

2015

Journal of Phytopathology

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Bacterial speck, caused by Pseudomonas syringae pv. tomato (Pst), is an economically important disease of tomato, resulting in yield loss of marketable fruit. Management of bacterial speck is a challenge in commercial production fields due to the limited efficacy of current disease management strategies, as the pathogen acquires resistance to antibiotics and fixed copper bactericides and host resistance has not proven durable. Therefore, it is essential to develop alternative disease management strategies, like biological control. In this study, the efficacy of the commercially available biocontrol agent Bacillus subtilis QST 713 along with copper hydroxide was tested against Pst under greenhouse conditions. QST 713 reduced significantly disease severity and incidence compared to control and the copper hydroxide treatment; subsequently, the Pst population was lower in the QST 713‐treated plants compared to control. In parallel, QST 713 and copper hydroxide increased plant height compared to control and mock plants. Furthermore, the quantitative PCR analysis of PR1a, PR1b and Pin2 expression suggests a positive role for Pin2 in the plant protective activity of QST 713, as Pin2 expression was significantly higher in the QST 713‐treated plants challenged with Pst compared to the control Pst‐inoculated plants.

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Section: Introductionmentioning

confidence: 99%

Bacillus subtilis QST 713 Confers Protection to Tomato Plants Against Pseudomonas syringae pv tomato and Induces Plant Defence‐related Genes

Fousia

Paplomatas

Tjamos

2015

Journal of Phytopathology

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“…campestris -repolho (ASSIS et al, 1998;BUREN et al, 1993;STURTZ & MATHESON, 1996). Colin & Chafik (1986) relataram que aplicações semanais de suspensão de células de dois isolados de Pseudomonas fluorescens controlou a Pst em tomate com igual eficiência ao tratamento com compostos cúpricos. Foi observada ainda a ocorrência de leve efeito residual, o que pode ser explicado pela capacidade das bactérias de manter população epifítica residual nas folhas de tomate.…”

Section: Introductionunclassified

Bactérias endofíticas no controle e inibição in vitro de Pseudomonas syringae pv tomato, agente da pinta bacteriana do tomateiro

et al. 2008

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RESUMOPara avaliar o potencial de 53 isolados de bactérias endofíticas no controle da pinta bacteriana do tomateiro (Lycopersicum esculentum Mill.), realizaram-se seleções massais em casa-de-vegetação e a seguir foi avaliado, in vitro, o antagonismo desses isolados sobre a bactéria desafiante Pseudomonas syringae pv. tomato (Pst). A inoculação das bactérias endofíticas foi feita por microbiolização das sementes de tomate cv. Santa Clara e da desafiante (Pst) por pulverização. Aos 7, 14 e 21 dias após a inoculação da Pst, foram realizadas as avaliações da severidade da pinta bacteriana, bem como da altura das plantas. As espécies e os isolados bacterianos mais eficazes na redução da severidade da pinta bacteriana foram: Acinetobacter johnsonii (isolado 10), Bacillus pumilus (isolados 3, 12, 20, 39, 51) Termos para indexação: Bactérias endofíticas, controle biológico, pinta bacteriana, tomate. ABSTRACTTo asses the potential of fifty three isolates of endophytic bacteria on the control of Pseudomonas syringae pv. tomato (Pst) in tomato (Lycopersicum esculentum Mill.), several screening were done in greenhouse followed by in vitro studies on antagonism of those isolates to Pst. The inoculation of endophytic bacteria was done by microbiolization of tomato cv Santa Clara seeds. The challenging bacterium (Pst) inoculation was done by spraying. At 7, 14 and 21 days after Pst inoculation the assessment of bacterial speck severity was done, and height of plants was also measured. The most efficient endophytic species and isolates in reducing disease severity were: Acinetobacter johnsonii (isolate 10), Bacillus pumilus (isolates, 3, 12, 20, 39, 51), Paenibacillus macerans (isolates, 37, 47), PIM 11, Bacillus sphaericus (isolate 45), B. amyloliquefaciens (isolate 50), TOM 2 , TOM 24 and Staphylococcus aureus (isolate 18). More than 50% of the endophytic isolates efficient in reducing disease severity belonged to Bacillus pumilus. From the most efficient endophytic species group, the species Bacillus pumilus and B. amyloliquefaciens inhibited the Pst growth in vitro. Several bacterial isolates promoted growth of tomato.

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“…tomato) is the causal organism of the bacterial speck disease of tomato (Lycopersicon esculentum Mill). Previously considered to be of minor economic importance (Colin and Chafic 1986) bacterial speck is now recognised as a significant source of economic loss in the tomato industry (Yunis et al 1980;Pohronezny 1994;Bashan and Bashan 2002;Kozik 2002;CABI 2005). Bacterial speck lesions on tomato fruits may make them unfit for the market.…”

Section: Introductionmentioning

confidence: 99%

Assessment of strains ofPseudomonas syringaepv.tomatofrom Tanzania for resistance to copper and streptomycin

Shenge

Wydra

Mabagala

et al. 2008

Archives Of Phytopathology And Plant Protection

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Fifty-six strains of Pseudomonas syringae pv. tomato (P.s. pv. tomato) were collected from tomatoproducing areas in Tanzania and assessed for resistance to copper and antibiotics. The collection was done from three tomato-producing regions (Morogoro, Arusha and Iringa), representing three different ecological conditions in the country. After isolation and identification, the P. s. pv. tomato strains were grown on King's medium B (KB) amended with 20% copper sulphate (w/v). The strains were also assessed for resistance to antibiotics. Results indicated that there was widespread resistance of the P. s. pv. tomato strains to copper sulphate. The highest level of resistance was recorded from the Arusha region (Northern Tanzania), 83.3% of the P. s. pv. tomato strains from that region showed resistance to copper sulphate. This was followed by Iringa region (Southern Tanzania), from where strains of the pathogen were moderately resistant to copper sulphate, such that 54.0% of them were able to grow on the KB medium amended with 20% (w/v) of the copper compound.Out of seven strains of P. s. pv. tomato from Morogoro region (Central Tanzania) included in the study, five (71.5%) were resistant to copper sulphate. The only strain of P. s. pv. tomato from the Dodoma region (Central Tanzania, but with a different ecological condition from the Morogoro region) included in the study was unable to grow on the medium containing 20% copper sulphate. None of the P. s. pv. tomato strains in the four regions included in the study were resistant to streptomycin sulphate. These results suggest that in the Arusha and Iringa regions of Tanzania, there might be possibilities of excessive use of copper compounds in tomato production, such that strains of P. s. pv. tomato strains in the areas have become resistant to the compounds.

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Comparison of Biological and Chemical Treatments for Control of Bacterial Speck of Tomato Under Field Conditions in Morocco

Cited by 29 publications

References 3 publications

Bacillus subtilis QST 713 Confers Protection to Tomato Plants Against Pseudomonas syringae pv tomato and Induces Plant Defence‐related Genes

Bacillus subtilis QST 713 Confers Protection to Tomato Plants Against Pseudomonas syringae pv tomato and Induces Plant Defence‐related Genes

Bactérias endofíticas no controle e inibição in vitro de Pseudomonas syringae pv tomato, agente da pinta bacteriana do tomateiro

Assessment of strains ofPseudomonas syringaepv.tomatofrom Tanzania for resistance to copper and streptomycin

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