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Turfgrass Diseases: Summaries

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The Effects of Various Fungicides on the Control of Overwintering Diseases (2011)

J.B. Ross and M.A. Anderson

Prairie Turfgrass Research Centre

This trial was initiated at two sites, Candle Lake Golf Course and Pine Hills Golf Course, to test the efficacy of two new fungicides that are mixtures of three active ingredients.  Disease pressure was considered to be low at Candle Lake and high at Rocky Mountain House.  In this trial, a single application of the two products, Trilogy SC and Instrata provided sufficient protection from the diseases present.

The Effects of Various Fungicides on the Control of Overwintering Diseases (2010)

J.B. Ross and M.A. Anderson

Prairie Turfgrass Research Centre

This trial was initiated at two sites, Candle Lake Golf Course and Greywolf Golf Resort, to test the efficacy of two new fungicides that are mixtures of three active ingredients.  The predominant disease was pink snow mould at both sites and stand symptoms at Candle Lake indicated that cottony snow mould may also have been present.  Disease pressure was considered to be low at Greywolf and moderate at Candle Lake.  Both products, Instrata and Legacy G (now registered as Trilogy SC), were very effective in controlling diseases with a single application.  This single application may provide sufficient protection when disease pressure is low to moderate.

The Effects of Various Fungicides on the Control of Overwintering Diseases - Greywolf (2008)

M.A. Anderson and J.B. Ross

Prairie Turfgrass Research Centre

This trial was developed in order to evaluate various fungicides for their control of overwintering diseases.  The site at Greywolf Golf Resort was chosen due to consistently high disease on their creeping bentgrass.  As a result, plots were not inoculatedas significant natural infections typically occur at this site.

Plots were laid out and treatments were applied on October 25, 2008.  Two evaluations to determine the effectiveness of the various treatments were conducted on April 11 and June 1, 2009.  The winter of 2008-09 was considered to be one where snow pack was well below normal and disease pressure was very low.  It was thought that the conditions leading up to permanent snow cover affected the incidence of disease.  The fact that the turf was frozen for a long period of time prior to snow cover was thought to be the reason for the low amounts of snow mould this year.

The Effects of Various Fungicides on the Control of Overwintering Diseases (2006)

M.A. Anderson and J.B. Ross

Prairie Turfgrass Research Centre

This trial was developed in order to evaluate various fungicides for their control of overwintering diseases.  Plots were laid out and inoculum of both grey and pink snow mould was applied to the individual plots.  Treatments were applied on November 15, 2006 and an evaluation to determine the effectiveness of the various treatments was conducted on May 10, 2007.  The winter of 2006-07 was one of normal snow cover for depth and duration.

The Effects of Various Fungicides on the Control of Overwintering Diseases (2006)

M.A. Anderson and J.B. Ross

Summary

This trial was developed in order to evaluate various fungicides for their control of overwintering diseases. Plots were laid out and inoculum of both grey and pink snow mould was applied to the individual plots. Treatments were applied on October 25 and November 4, 2005 and an evaluation to determine the effectiveness of the various treatments was conducted on April 7 and May 4, 2006. The winter of 2005-06 was considered to be one of the warmest and driest on record for Olds. Continual snow cover was only a couple of weeks. As a result, disease pressure was very low. Due to this lack of snow there were no treatment differences for any of the products for either of the inoculated diseases.

The Effects of Various Fungicides on the Control of Overwintering Diseases 2004-05 (2005)

J.B. Ross and M.A. Anderson, Prairie Turfgrass Research Centre; Jason Carleton, Grewolf Golf Resort

Summary

This trial was developed in order to evaluate various fungicides for their control of overwintering diseases. The site at Greywolf Golf Resort was chosen due to consistently high disease on creeping bentgrass fairways. This site is considered a worst case scenario for snow moulds due to the susceptibility of the grasses to snow mould and the long winters with deep snow cover. As a result, plots were not inoculated as significant natural infections typically occur at this site. Plots were laid out and treatments were applied on October 14 and 25, 2004. An evaluation to determine the effectiveness of the various treatments was conducted on April 12 and 26, 2005. The winter of 2004-05 was considered to be one where snow pack was below normal to normal and disease pressure was high. The snow cover duration was 153 days

All products were applied on both application dates unless otherwise stated. Rate of application was per 100m2. Effective control of Fusarium patch (pink snow mould) was obtained with the following treatments.

  • Compass 50 WG 22.8 g
  • Compass 50 WG 15.2 g
  • Rovral Green GT 250ml and Compass 50 WG 7.6 g
  • Triticonazole SC 1.67 32ml and Compass 50WG 7.6g
  • Triticonazole SC1.67 32ml and Rovral Green GT 250ml
  • Triticonazole SC 1.67 32 ml and Compass 50WG 7.6 g and Rovral Green GT 125 ml
  • A14036B 296 mls single application only
  • A14036B 222 mls single application only
  • Medallion 4.3 g and Banner MAXX 54 ml and Daconil 2787 107 ml single application only

Pink Snow Mold

The Effects of Various Fungicides on the Control of Overwintering Diseases 2003-04 (2004)

M.A. Anderson and J.B. Ross Prairie Turfgrass Research Centre; Tom Altmann and Jason Carleton Greywolf Golf Resort

Summary

This trial was developed in order to evaluate various fungicides for their control of overwintering diseases. The site at Greywolf Golf Resort was chosen due to consistently high disease on creeping bentgrass fairways. This site is considered a worst case scenario for snow moulds due to the susceptibility of the grasses to snow mould and the long winters with deep snow cover. As a result, plots were not inoculated as significant natural infections typically occur at this site. Plots were laid out and treatments were applied on October 17 and 27, 2003. An evaluation to determine the effectiveness of the various treatments was conducted on April 16, 2003.

The winter of 2003-04 was considered to be one where snow pack was normal to above normal and disease pressure was very high. The snow cover duration was about 158 days. However, a rainfall event that occurred prior to, during and after the first application of the products likely reduced their effectiveness. This may have increased the area covered by disease, as it was 93% on the untreated control plots.

All products were applied on both application dates unless otherwise stated. Rate of application was per 100m2. Effective control was obtained with the following treatments.

  • Rovral Green GT 250ml and Daconil 50WG 250ml and Terraclor 75W 120g
  • Quintozene 7-3-12 1560g (single application on final date only)
  • Quintozene 7-3-12 1560g
  • Quintozene 7-3-12 1170g
  • Quintozene 7-3-12 780g
  • Triticonazole SC1.67 32ml and Compass 50WG 15.2g
  • Banner 130EC 170ml and Daconil 50WG 250ml
  • Rovral Green GT 250ml and Compass 50WG 7.6

The Effects of Various Fungicides on the Control of Overwintering Diseases 2002-03 (2003)

M.A. Anderson and J.B. Ross

Prairie Turfgrass Research Centre

Jerry Rousseau and Tom Altmann

Greywolf Golf Resort

Summary

This trial was developed in order to evaluate various fungicides for their control of overwintering diseases. The site at Greywolf Golf Resort was chosen due to consistently high disease on creeping bentgrass fairways. This site is considered a worst case scenario for snow moulds due to the susceptibility of the grasses to snow mould and the long winters with deep snow cover. As a result, plots were not inoculated as significant natural infections typically occur at this site. Plots were laid out and treatments were applied on October 16 and November 7, 2002. An evaluation to determine the effectiveness of the various treatments was conducted on April 16, 2003.

The Effects of Various Fungicides on the Control of Overwintering Diseases - 2001-02 (2002)

M.A. Anderson and J.B. Ross

Prairie Turfgrass Research Centre

Jerry Rousseau and Tom Altmann

Greywolf Golf Resort

Summary

This trial was developed in order to evaluate various fungicides for their control of overwintering diseases. The site at Greywolf Golf Resort was chosen due to consistently high disease on its creeping bentgrass fairways. This site is considered a worst case scenario for snow moulds due to the susceptibility of the grasses to snow mould and the long winters with deep snow cover. Plots were not inoculated as significant natural infections typically occur at this site. Plots were laid out and treatments were applied on October 16 and October 25, 2001. Plots were evaluated on April 30, 2002 for effectiveness of the various treatments. The winter of 2001-02 was considered to be one where snow pack was above normal and disease pressure very high. The snow cover duration was about 137 days.

 

The Effects of Various Fungicides on the Control of Overwintering Diseases (2000)

D.-W. Li and J.B. Ross

Jerry Rousseau and Tom Altmann - Greywolf Golf Resort

Summary

This trial was developed in order to evaluate various fungicides for their control of overwintering diseases. The site at Greywolf Golf Resort was chosen due to consistently high disease on its creeping bentgrass fairways. This site is considered a worst case scenario for snow moulds due to the susceptibility of the grasses to snow mould and the long winters with deep snow cover. Plots were not inoculated as significant natural infections typically occur at this site. Plots were laid out and treatments were applied on October 12 and October 23, 2000. Plots were evaluated on April 25, 2001 for effectiveness of the various treatments. The winter of 2000-01 was considered to be one where snow pack was less than normal but disease pressure was still very high. The snow cover duration was about 150 days.

The most effective control was obtained with the following treatments:

  • Eagle 40WP 30g/100m2 and Rovral Green 240ml/100m2 (double application)
  • Banner 130EC 170ml and Rovral Green 250ml/100m2 (double application)
  • TTZ 32ml and Rovral Green 250ml/100m2 (double application)
  • Heritage 24g/100m2 and Banner 130EC 180ml/100m2
  • Eagle 40WP 30g/100m2 (double application

The Effects of Various Fungicides on the Control of Overwintering Diseases Greywolf Golf Resort (2000)

D.-W. Li and J.B. Ross

Contained below is the current trial that was been initiated at the Greywolf Golf Resort in the fall of 2000. Results from last year's trial showed that this is an excellent site to conduct snow mould studies as disease pressure is consistently high. The cooperation of Superintendent, Tom Altmann and assistants Gerry Rousseau and Lee Lax has been very beneficial and greatly appreciated.