Management of Dollar Spot on Creeping Bentgrass with Metabolites of <i>Pseudomonas aureofaciens</i> (TX-1)

Powell, J.; Vargas, J. M.; Nair, Muraleedharan G.; Detweiler, A. R.; Chandra, Amar K.

doi:10.1094/pdis.2000.84.1.19

Cited by 39 publications

(23 citation statements)

References 22 publications

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“…Other research has reported the enhanced benefits of applying organic fertilizer in conjunction with conventional fungicides for reducing DSSv (18). This biofungicide study supports the results of published successes of biological control methods for DS on cool‐season turfgrasses (7,13,16,20,21). However, this is the first report of biofungicides successfully controlling DS on warm‐season turfgrass.…”

Section: Resultssupporting

confidence: 86%

“…Extensive research has been conducted on the use of alternative disease management tools to control DS (7,13,16,19,20,21). Biological agents and use of organic fertilizers have been proven to be effective for suppressing dollar spot in cool‐season grasses (16,19,21).…”

Section: Introductionmentioning

confidence: 99%

“…These products are composed of fungal or bacterial formulations or biologically‐based extracts that are prepared in granular or liquid form. They can be applied with minimal difficulty and their efficacy for DS control in some instances has been similar to conventional fungicides when DSSv was high (13,19,21).…”

Section: Introductionmentioning

confidence: 99%

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The Role of Biofungicides and Organic Fertilizer in the Management of Dollar Spot in Bermudagrass

Tomaso‐Peterson

Perry

2007

Applied Turfgrass Science

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Dollar spot (DS), caused by Sclerotinia homoeocarpa F. T. Bennett, is a foliar disease of warm‐ and cool‐season grasses and occurs frequently throughout the growing season. A three‐year study was conducted to evaluate the efficacy of biofungicides for controlling DS of bermudagrass [Cynodon dactylon (L.) Pers. var. dactylon × C. transvaalensis Burtt‐Davy]. The biofungicides evaluated in this study were EcoGuard, TurfShield, and Actinovate SP. A slow‐release organic fertilizer was applied in conjunction with biofungicide and conventional fungicide treatments in 2006. All biofungicide treatments significantly reduced dollar spot severity (DSSv) in the spring of 2004. However, treatments were similar to the untreated control in 2005. Dollar spot severity was significantly reduced in plots that received organic fertilizer plus biofungicides applied at intervals of 14 days or greater in 2006. In 2004 and 2006, significant reductions in DSSv were observed when EcoGuard and TurfShield were alternated with conventional fungicides. The results of the three‐year study indicate EcoGuard, TurfShield, and Actinovate SP applied alone or alternated with conventional fungicides or in conjunction with slow‐release organic fertilizer are effective for controlling DS.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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The Role of Biofungicides and Organic Fertilizer in the Management of Dollar Spot in Bermudagrass

Tomaso‐Peterson

Perry

2007

Applied Turfgrass Science

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“…Moreover, some antibiotics, viz. PCA, are being studied to control foliar phytopathogens [25], and hence, fermentative mass production is also being optimized [26].…”

Section: Detection Of Additional Metabolitesmentioning

confidence: 99%

Exploring Antagonistic Metabolites of Established Biocontrol Agent of Marine Origin

Rane

Sarode

Chaudhari

et al. 2008

Appl Biochem Biotechnol

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Biocontrol ability of Pseudomonas aeruginosa ID 4365, a biocontrol agent of groundnut phytopathogens from marine origin, was previously attributed to the production of pyoverdin type of siderophores. However, pyoverdin-rich supernatants of this organism showed better antifungal activity compared to equivalent amount of purified pyoverdin indicating presence of undetected metabolite(s) in pyoverdin rich supernatants. On the basis of observation that antagonistic activity was iron-dependent and iron-independent, an attempt was made to detect the presence of additional metabolites. In addition to pyoverdin, strain produced additional siderophores, viz. pyochelin and salicylic acid. Two broad spectrum antifungal compounds, viz. pyocyanin and phenazine-1-carboxylic acid, were detected, characterized, and activity against phytopathogens was demonstrated. Iron- and phosphate-dependent co-production of siderophores and phenazines was confirmed. Strain showed additional features like production of hydrogen cyanide, indol-3-acetic acid, and phosphate solubilization.

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“…Numerous reports indicate that phenazine antibiotic production by strains of Ps. chlororaphis, including Tx-1, and of other Pseudomonas spp., is important for effective control of various rootinfecting pathogens (Bull et al ., 1991;Mazzola et al ., 1992;Carruthers et al , 1995;Pierson III & Pierson, 1996;Chin-A-Woeng et al ., 2000;Powell et al ., 2000;Timms-Wilson et al ., 2000), and this may have been the case with Tx-1 against P. aphanidermatum . Phenazineproducing strains of pseudomonads were effective in controlling several diseases caused by Pythium spp.…”

Section: Shoots Rootsmentioning

confidence: 99%

Effects ofPseudomonas chlororaphisonPythium aphanidermatumand Root Rot in Peppers Grown in Small-scale Hydroponic Troughs

Khan

Sutton

Grodzinski

2003

Biocontrol Science and Technology

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The ability of Pseudomonas (Ps.) chlororaphis isolate Tx-1 to suppress Pythium aphanidermatum and control root rot was investigated in sweet peppers grown in small-scale hydroponic trough units with recirculating nutrient solution. The agent was introduced to the nutrient solution 3 days after the peppers were inoculated with P. aphanidermatum, or 4 days before and 3 days after inoculation, or 4 days before and 3 and 10 days after. Controls either received no agent or pathogen, or the agent only (applied once, 4 days before the time of pathogen inoculations), or the pathogen only. The experiment was conducted in a greenhouse with repetitions beginning in January, March, and May. Severity of root browning associated with P. aphanidermatum, in the absence of Ps. chlororaphis, increased in the first, second and third repetitions, respectively, to 74% at 21 days, 28% at 21 days, and 68% at 11 days. In treatments with one, two, or three applications of Ps. chlororaphis, respectively, areas under root browning progress curves were reduced by 18 Á/48%, 50 Á/73%, and 62 Á/79% compared to the pathogen controls, and recovery incidence of the pathogen from roots at 21 days after inoculation was reduced by 14 Á/47%, 62 Á/82%, and 60 Á/89%. Roots not inoculated with P. aphanidermatum were whitish and not colonized by the pathogen. Density of Ps. chlororaphis in treated plants was usually 2)/10 3 Á/1.2)/10 5 cfu g (1 fresh roots. The Ps. chlororaphis treatments almost invariably prevented reductions in plant height, leaf area, fresh mass and dry mass of the shoots and of the roots, and root volume associated with P. aphanidermatum and root browning. It is concluded that Ps. chlororaphis Tx-1 strongly antagonized P. aphanidermatum in the pepper roots and that the agent has considerable potential for controlling root rot and maintaining productivity in commercial hydroponic peppers.

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Management of Dollar Spot on Creeping Bentgrass with Metabolites of Pseudomonas aureofaciens (TX-1)

Cited by 39 publications

References 22 publications

The Role of Biofungicides and Organic Fertilizer in the Management of Dollar Spot in Bermudagrass

The Role of Biofungicides and Organic Fertilizer in the Management of Dollar Spot in Bermudagrass

Exploring Antagonistic Metabolites of Established Biocontrol Agent of Marine Origin

Effects ofPseudomonas chlororaphisonPythium aphanidermatumand Root Rot in Peppers Grown in Small-scale Hydroponic Troughs

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