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TURF DISEASE DETECTION VIII. Dollar Spot

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Índice de contenidos: TURF DISEASE DETECTION VIII. Dollar Spot

Dollar spot is one of the most damaging fungal diseases of sports turf. The causal agent was described in 1937 as Sclerotinia homeocarpa, however, phylogenetic evidence confirms that S. homeocarpa is not a specie of Sclerotinia, but a new genus, described as Clarireedia. We should be paying atention to these new identified species like Clarireedia homeocarapa and C. bennetti which occur mainly on Festuca rubra (C3); Clarireedia jacksonii and C. monteithaiana which are more globally distributed and affect both C3 and C4 . In addition, since 2021 Clarireedia paspali and C. hainanense have also been included. Fuente: https://doi.org/10.1016/j.funbio.2018.04.004

Now you can request all your phytodiagnostic analyses from us at info@tiloom.com where we will include if you have dollar spot affection, which species and in what ranges of incidence. We also evaluate the nutritional levels present in relation to MLSN ranges, salinity, organic matter, etc…with also some added value related to data analysis

Pathogen analysis

Nitrates measurement at dilution 1:2

We recommend the use of ionometers among other tools so that you can manage your nitrate content, pH, etc… in the most appropriate way, and will be able to efficiently and sustainably manage your greens or football pitches.

The disease itself is very easily identifiable through the symptoms, such as small circular tan spots of small size and brown to reddish edges, in the manner of old dollar coins. The pathogen survives in an inactive form over organic mowing debris and leaf tissues as temperatures rise and after prolonged periods of dew (over 8 hours), common in spring periods.

The fungal mycelium grows and develops radially, spreading to more areas of the shoot origin. It does not produce spores, but maintenance operations, such as mowing, spread the disease.

Tiloom only works through the best independent certified laboratories to obtain all the information and processes it with a powerful in-house data analysis.

It is increasingly common to find cases of resistance in our greens, good practice treatments consist of organic amendments, inoculation of micro-organisms, promoting new forms of more efficient and sustainable management. In grass varieties mowed at higher cutting heights such as Poa Pratensis or Lolium Perenne (English Ray Grass), it is even clearer to identify them.

screenshots_2016-11-09-08-32-56

The parameters that most affect its development are high humidity and low nutritional levels of nitrogen, so monitoring these are essential for its control. The control of foliar nitrogen can be carried out indirectly by measuring the NDVI index or by measuring the nitrogen in our greens or football pitches using our ionometers with 1:2 soil:water dilutions, as well as monitoring the humidity levels of the soil with measuring equipment such as the POGO sensor.

Maintenance operations such as mowing spreads the disease.

It is very easily identifiable through the symptoms. Small brown circular spots of small size and edges of brown to reddish, like the old dollar coins.

The pathogen survives inactive in organic debris from mowing and leaf tissues. When the temperatures increase and after long periods of heavy dew (over 8 hours), common in spring periods.

The fungal mycelium grows and develops radially, extending to more areas of the sports surfaces. It does not produce spores, but maintenance operations, such as mowing, spread the disease.

In varieties of lawn mowed at higher cutting heights such as Poa Pratensis or Lolium Perenne (English Ray Grass), its identification is even clearer.

screenshots_2016-11-09-08-32-56

Mycelium

The parameters that most affect its development are high humidity and low nutritional levels of Nitrogen, so monitoring them is essential for control. The control of foliar nitrogen can be carried out indirectly by measuring the NDVI index or by measuring the nitrogen in our greens or football pitches using our ionometers with 1:2 soil:water dilutions, as well as monitoring the humidity levels of the soil with measuring equipment such as the POGO sensor.

Maintenance operations such as mowing spread the disease.

We recommend monitoring the key parameters that affect the activity of the fungi that cause it, such as temperature and humidity, with warm days with cool nights and intense dew being the determining factors , as well as trying to stimulate the natural defences of our lawns.

Lite Kit Pro Greens

Do you want to use the latest technology? Diagnose your turf with Tiloom and rapid disease analysis. Also study all the agronomy and biomechanical variables with our Kits.

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