Dollar Spot

dollar spot

Causes

  • The grass species Fescue (Festuca) are normally the most susceptible.
  • Spots about 25-50mm (size of an American Dollar) in diameter of a distinct straw coloured, almost bleached looking grass that are slightly sunken.
  • Leaf lesions have a bleached white centre and reddish brown borders, some mycelial growth may be visible in early morning.
  • Dollar Spot is triggered by: Prolonged periods of leaf wetness. Moderately dry soil. Humid conditions with temperatures of 21-26C. Low to deficient nitrogen (N) fertility. Excessive thatch.

Cultural Control

  • Reduce periods of leaf wetness.
  • Water early mornings and not in the evenings.
  • Maintain good nutritional inputs.
  • Apply amino acids to help elevate stress.
  • Aerate to ensure that root zone is not compacted.
  • Manage thatch levels in a programmed approach.
  • Reduce mowing and box-off cuttings from affected areas if possible.

Chemical Control

  • Apply Banner Maxx (propiconazole), Instrata (Propiconazole, Chlorathalonil & Fludioxonil ) of Chipco Green (ipodione).
  • Always add Prestige Super Recovery to each fungicide application.
  • Use fungicides as part of an IPM programme and be aware of causing resistance to one chemical group by its regular use.

Use plant protection safely. Always read the label and product information before use

 


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