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Anthracnose issues?

Anthracnose is a disease common in Poa golf greens throughout summer. It attacks weakened Poa and can lead to turf death. It commonly follows drought stress and is favoured by high humidity. Preventive fungicide treatment is essential as recovery of Poa from damage in mid-summer can be very slow. A recent presentation from Dr John Kaminski of Penn State University highlighted the latest research on Anthracnose control.

Key points :

  • Regular, light nitrogen apps equivalent to 1-2 bags Nutrite Bentgrass Soluble per ha monthly is essential. It is actually preferable to apply fertiliser biweekly at 0.5-1 bag.
  • Cutting greens with a solid roller is better than a Wiley roller. Greens mowed with a Wiley have higher disease incidence.
  • Solid Spring renovation with a good top-dress covers the crown with soil. This then protects the crown from physical damage which minimises Anthracnose infection. Additionally dusting into Summer ensures sand keeps the crown protected. Kaminski also believes dusting artificially increases the mowing height hence reducing stress on the turf.
  • Primo Maxx® applied at suitable rates into summer reduces disease infection, especially combined with an ability to mow less and roll more often.
  • Intercept® applied throughout winter and into summer to stop seed-head production keeps Poa in a vegetative state, stops the energy waste of seed production and hence reduces stress on Poa thus allowing it to be more disease tolerant in summer.

 

Best fungicide control combinations all involve Daconil® / Dacogreen® as the contact. If Pythium protection is also important then include Penncozeb. Based on Kaminski’s comments rotate biweekly

  1. Signature® + Daconil Weather Stik®
  2. Dedicate®Daconil Weather Stik®
  3. Heritage Maxx®Daconil Weather Stik®
  4. Protak®Daconil Weather Stik®

 

For Pythium include Signature®  + Penncozeb® as a foliar and Terrazole or Proplant® as a drench A foliar program to follow would be:

Anthracnose program
For more detailed information on Anthracnose or support please contact your Living turf Representative.