Pythium Root Dysfunction

Causal Agent: Pythium spp.

Susceptible Turfgrasses: Cool and warm season grasses.


  • Affected turf may appear thin, off colour and slow growing.

  • This may occur in small patches or as a general decline and loss of large turfgrass area.

  • Under cool, wet conditions symptoms may first appear as small, diffuse yellow patches of turf 4 to 7cm in diameter.

  • As temperatures rise, large areas of turf may wilt, turn brown and die.

  • In severely infected plants, crowns may appear water-soaked and root systems are greatly reduced in volume and vigour.

  • Roots and crown may be extensively discoloured.

  • No foliar mycelium is evident during infection.

Conditions Favouring Disease

  • Hot days (30-35°C), humid or rainy weather when night temperatures are warm (above 20°C).

  • Relative humidity exceeding 90% for at least 14 hours and a minimum temperature not falling below 20°C.

  • Pythium Root Dysfunction occurs in areas with high soil moisture, poor drainage and low light.

  • Areas with low mowing height and excessive wear.

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Products to Use Pythium Root Dysfunction


Banol final

60% Propamocarb Banol is a systemic fungicide that provides effective control of Damping Off in ornamental plants and turf caused by…

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TMTD 600


TMTD 600 is a flowable form of 600g/L Thiram. TMTD 600 is highly effective in the control of Brown Patch, Helminthosporium…

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Subdue Maxx

SubdueMaxx1L_June2015 rgb

24% Metalaxyl-M Subdue Maxx is a systemic and residual fungicide providing up to 21 days control, making it ideal for the…

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Signature v2

80% Fosetyl-Al Chipco Signature is a true systemic fungicide containing 80g/L Fosetyl-Al, which travels up and down within the plant. Chipco…

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Heritage Maxx


9.5% Azoxystrobin Heritage Maxx contains 95g/L azoxystrobin which combines systemic activity through xylem mobility, translaminar movement to encourage multi-site uptake and…

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Headway Maxx


6.2% Azoxystrobin + 1.04% Propiconazole Headway Maxx combines the strength, longevity and broad spectrum of Heritage MAXX with the speed and…

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Fosetyl 800

Fosetyl 800

80% Fosetyl-Al Fosetyl 800 is a rapidly absorbed fungicide that is taken up by the plants leaves or roots and travels…

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