Ineficiência de acibenzolar-S-methyl na indução de resistência de feijoeiro comum à murcha-de-Curtobacterium

Soares, R. M.; Maringoni, Antônio Carlos; Lima, Giuseppina Pace Pereira

doi:10.1590/s0100-41582004000400002

Cited by 19 publications

(13 citation statements)

References 14 publications

(15 reference statements)

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“…Embora Soares et al (2004) contestem sua eficácia no controle de doenças da cultura do feijoeiro, no presente trabalho observouse que o produto foi capaz de reduzir a severidade da doença em relação ao tratamento controle (Figura 1).…”

Section: Resultsunclassified

Biocontrole da mancha-angular do feijoeiro por antagonistas bacterianos

Garcia

Silva²

2011

Pesq. agropec. bras.

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(2) In memoriam Resumo -O objetivo deste trabalho foi avaliar o efeito de isolados de Bacillus cereus e Pseudomonas putida sobre a severidade da mancha-angular do feijoeiro, em condições de campo. Quatro experimentos foram conduzidos em épocas favoráveis à mancha-angular (Pseudocercospora griseola), com as cultivares Pérola e Ouro Negro. Os experimentos foram realizados em delineamento de blocos ao acaso, com seis repetições. Os tratamentos foram pulverizações sobre as plantas com três estirpes de B. cereus (UFV-172, UFV-101 e UFV-75) e duas estirpes de P. putida (UFV-53 e UFV-Pp), acibenzolar-S-metil, fungicida clorotalonil e controle pulverizado com água, no total de oito tratamentos. Os tratamentos foram aplicados por atomização no filoplano de plantas de feijoeiro, semanalmente, a partir do 15 o dia após a emergência até o fim do ensaio. Calculou-se a área abaixo da curva de progresso da mancha-angular do feijoeiro; a doença ocorreu naturalmente. A produção foi avaliada pela massa média de sementes por planta. Os antagonistas foram eficientes em reduzir a severidade da doença, em comparação à testemunha, e obtiveram o mesmo nível de controle do tratamento químico. O menor índice de severidade da doença propiciou melhor produção do que o tratamento controle.Termos para indexação: Bacillus cereus, Phaseolus vulgaris, Pseudocercospora griseola, Pseudomonas putida. Biocontrol of bean angular leaf spot by bacterial antagonistsAbstract -The objective of this work was to evaluate the effect of Bacillus cereus and Pseudomonas putida isolates on the severity of the angular leaf spot of common bean under field conditions. Four trials were carried out in favorable seasons to angular leaf spot (Pseudocercospora griseola), using the cultivars Pérola and Ouro Negro. The assays were assembled in a randomized block design with six replicates. The treatments were plant-sprayings with three strains of B. cereus (UFV-172, UFV-101 and UFV-75) and two strains of P. putida (UFV-53 and UFV-Pp), acibenzolar-S-methyl, chlorothalonil fungicide and the control with water, in a total of eight treatments. The treatments were applied weekly by spraying the phylloplane of bean plants, starting from the 15 th day after seedling emergency until the end of the assay. The area under the disease progress curve of the angular leaf spot was calculated; the disease occurred naturally. Yield was evaluated by the average seed mass per plant. The antagonists were effective in reducing the severity of the disease, in comparison to the control, and they had the same control level as the chemical treatment. The lowest index of the disease severity provided the best yield, in comparison to the control treatment.

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Section: Resultsunclassified

Biocontrole da mancha-angular do feijoeiro por antagonistas bacterianos

Garcia

Silva²

2011

Pesq. agropec. bras.

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“…With the results obtained at different times of collection of leaf samples, the area under the progress curve of the production of the compounds was evaluated (enzymes) as a function of time (samples) (Soares et al, 2004). The data were subjected to analysis of variance, using the statistical program SISVAR (Ferreira, 2000) and the means were compared by the Scott-Knott test at 5% probability.…”

Section: Enzymatic Activity Of the Leaves Treated And Inoculated Withmentioning

confidence: 99%

Control of Bacterial Spot of Tomato and Activation of Enzymes Related to Resistance by Chemicals Under Field Conditions

Itako¹,

Júnior²,

Demant³

et al. 2014

JAS

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The control of tomato bacterial spot by the application of chemicals was evaluated on field condition during two trials. Thirty days after transplanting and every 14 days the tomato plants PA-529 hybrid were sprayed with acibenzolar-S-methyl (2.5 g·100) and water (control), totaling five applications during the crop cycle. Forty days after transplanting, the plants were inoculated with a Xanthomonas perforans isolate (10 7 UFC·mL -1 ), disease severity was assessed (10, 19, 29, and 36 days after inoculation), and the area under the disease progress curve was calculated. All chemicals controlled the disease, but better results for total mass and number of fruit was obtained for fluazinam, pyraclostrobin, pyraclostrobin + metiram, copper oxychloride, and mancozeb + copper oxychloride in the first trial, and pyraclostrobin and pyraclostrobin + metiram in the second trial. The average fruit weight, °Brix, pH and total acidity were not affected by the application of the chemicals. The enzymatic activity of the polyphenol oxidase and peroxidase was higher in the first trial, but in the second, only the polyphenoloxidase had the highest activity in the treatments with acibenzolar-S-methyl, pyraclostrobin, and pyraclostrobin + metiram on tomato leaves. Products containing pyraclostrobin increased the activity of some enzymes without reducing the productivity.

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“…Resistance induction also provides a further alternative for integrated management (Soares et al, 2004;Bonaldo et al, 2005;Dias-Arieira et al, 2012). The study of resistance induction for controlling nematodes has been increasingly reported over the past few years, with research projects on a number of elicitors for resistance to a range of phytonematodes in a variety of crops (Fabry et al, 2007;Franzener et al, 2007;Molinari and Baser, 2010).…”

Section: Introductionmentioning

confidence: 99%