Evaluation of &lt;i&gt;Sclerotinia sclerotiorum&lt;/i&gt; for giant buttercup control in dairy pastures

Verkaaik, M. L.; Hurrell, G. A.; Bourdôt, G. W.; Saville, David J.

doi:10.30843/nzpp.2004.57.6974

Cited by 8 publications

(6 citation statements)

References 9 publications

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“…In New Zealand, the natural occurrence of S. sclerotiorum on R. acris has resulted in the pathogen being developed as a mycoherbicide (Cornwallis et al. , 1999; Verkaaik et al. , 2004).…”

Section: Introductionmentioning

confidence: 99%

Population structure of Sclerotinia sclerotiorum in crop and wild hosts in the UK

et al. 2012

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Sclerotinia sclerotiorum is an important pathogen of many crop plants which also infects wild hosts. The population structure of this fungus was studied for different crop plants and Ranunculus acris (meadow buttercup) in the UK using eight microsatellite markers and sequenced sections of the intergenic spacer (IGS) region of the rRNA gene and the elongation factor 1-alpha (EF) gene. A total of 228 microsatellite haplotypes were identified within 384 isolates from 12 S. sclerotiorum populations sampled in England and Wales. One microsatellite haplotype was generally found at high frequency in each population and was distributed widely across different hosts, locations and years. Fourteen IGS and five EF haplotypes were found in the 12 populations, with six IGS haplotypes and one EF haplotype exclusive to buttercup. Analysis of published sequences for S. sclerotiorum populations from the USA, Canada, New Zealand and Norway showed that three of the IGS haplotypes and one EF haplotype were widely distributed, while eight IGS haplotypes were only found in the UK. Although common microsatellite and IGS ⁄ EF haplotypes were found on different hosts in the UK, there was evidence of differentiation, particularly for one isolated population on buttercup. However, overall there was no consistent differentiation of S. sclerotiorum populations from buttercup and crop hosts. Sclerotinia sclerotiorum therefore has a multiclonal population structure in the UK and the wide distribution of one microsatellite haplotype suggests spatial mixing at a national scale. The related species S. subarctica was also identified in one buttercup population.

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“…In New Zealand, the natural occurrence of S. sclerotiorum on R. acris has resulted in the pathogen being developed as a mycoherbicide (Cornwallis et al. , 1999; Verkaaik et al. , 2004).…”

Section: Introductionmentioning

confidence: 99%

Population structure of Sclerotinia sclerotiorum in crop and wild hosts in the UK

et al. 2012

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“…Despite the lack of published comparative data, this novel experiment has revealed that Carduus tenuiflorus and C. nutans are both highly susceptible to low doses of a gel preparation of the mycelia of Sclerotinia sclerotiorum. This potentially enables field application rates (of a mycoherbicide utilising this fungus) for these and other weed species to be much lower than the 30-50 g/m 2 found necessary for controlling Ranunculus acris and Cirsium arvense in pastures using solid state formulations (Verkaaik et al 2004;Bourdôt et al 2006a).…”

Section: Discussionmentioning

confidence: 99%

“…The fungus Sclerotinia sclerotiorum (Lib.) de Bary, formulated as mycelia on a solid foodsource substrate has, in small-scale experiments with the pasture weeds Cirsium arvense (Bourdôt et al 2006a) and Ranunculus acris (Verkaaik et al 2004;Bourdôt et al 2007b), revealed its potential as a mycoherbicide. Other experiments and models demonstrate that despite its wide host range, it could be safely deployed for weed control in permanent pastures without risk to neighbouring susceptible crops (Bourdôt et al 2006b).…”

Section: Introductionmentioning

confidence: 99%

“…kibbled wheat, spent brewers barley) and with the storage, transport, handling and field application of large volumes of material. Application rates of 30-50 g/m (300-500 kg/ha) have commonly been required in field trials with S. sclerotiorum (Verkaaik et al 2004;Bourdôt et al 2006a). In contrast, for Sclerotinia minor a solid state formulation of this fungus applied at 60 g/m 2 to control Taraxacum officinale may be commercially viable for use in high-value fine turf swards (Abu-Dieyeh & Watson 2006.…”

Section: Introductionmentioning

confidence: 99%

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Comparative doseresponses of five pasture weeds to a <i>Sclerotinia sclerotiorum</i> mycoherbicide

Bourdôt

Hurrell²,

Saville³

2011

NZPP

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A gel preparation of mycelia of the plant pathogen Sclerotinia sclerotiorum was applied to the pasture weeds Carduus nutans L Carduus tenuiflorus L Cirsium arvense (L) Scop Jacobaea vulgaris L and Ranunculus acris L Doses ranging from 0 to 1000 l gel/plant were applied as 10 or 50 l droplets one per leaf axil Statistically significant responses to dose were evident in C arvense J vulgaris and R acris leading to 90 74 and 100 reductions in living tissue respectively at 200 l/plant compared to the control 29 days after treatment For C nutans and C tenuiflorus where even low doses gave good control the reductions (averaged over all doses) were 98 and 88 respectively indicating that these two annual thistles were exceptionally susceptible to this S sclerotiorum formulation For C nutans 1 litre of the gel would if precision applied be sufficient to control at least 20000 plants suggesting broadacre use may be commercially viable

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“…Sclerotinia sclerotiorum (Lib.) de Bary, a naturally occurring pathogen of many weeds (Pennycook 1989), has been shown to have potential as a mycoherbicide for controlling Californian thistle (Cirsium arvense) (Hurrell et al 2001;Bourdôt et al 2006), giant buttercup (Ranaunculus acris) (Harvey & Bourdôt 2001;Verkaaik et al 2004) and a number of other pastoral weed species (Waipara et al 1993). A new host record for S. sclerotiorum was recently observed for wandering Jew (Tradescantia fluminensis) in New Zealand (N.W.…”

Section: Introductionmentioning

confidence: 99%

<i>Sclerotinia sclerotiorum</i> shows potential for controlling water lettuce alligator weed and wandering Jew

Waipara¹,

Bourdôt²,

Hurrell³

2006

NZPP

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The responses of six aquatic environmental weeds (water hyacinth (Eichhornia crassipes) alligator weed (Alternanthera philoxeroides) water lettuce (Pistia stratiotes) ferny azolla (Azolla pinnata) parrots feather (Myriophyllum aquaticum) and bladderwort (Utricularia giba) and a terrestrial weed (wandering Jew (Tradescantia fluminensis)) to Sclerotinia sclerotiorum were evaluated The fungus was applied as a myceliumonbarley formulation to individual containergrown plants Visual scores of lesion development revealed that a watery softrot disease caused by the pathogen developed in the treated water lettuce alligator weed and wandering Jew plants In water lettuce the pathogen resulted in 100 mortality of treated plants 54 days after application Shoot necrosis was 4 (control) and 24 (treated) for wandering Jew and 9 (control) and 17 (treated) for alligator weed at 35 and 52 days after inoculation respectively These results indicate that S sclerotiorum has potential as a mycoherbicide for controlling water lettuce and possibly also alligator weed and wandering Jew

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Evaluation of <i>Sclerotinia sclerotiorum</i> for giant buttercup control in dairy pastures

Cited by 8 publications

References 9 publications

Population structure of Sclerotinia sclerotiorum in crop and wild hosts in the UK

Population structure of Sclerotinia sclerotiorum in crop and wild hosts in the UK

Comparative doseresponses of five pasture weeds to a <i>Sclerotinia sclerotiorum</i> mycoherbicide

<i>Sclerotinia sclerotiorum</i> shows potential for controlling water lettuce alligator weed and wandering Jew

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