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

Nobility Systemic Fungicide

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Nobility Systemic Fungicide should be used preventively for the control of Pythium diseases in turf. Nobility Systemic Fungicide is an organic…

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Lexicon Intrinsic Fungicide

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Lexicon delivers peak performance under pressure, optimising disease control and providing plants with longer, stronger roots and increased growth. Lexicon controls…

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Mayfair Fungicide

Mayfair Packshot 5L

Mayfair Fungicide is a Liquid ME (Micro Emulsion) formulation that contains 240 g/L metalaxyl-M. Mayfair Fungicide has excellent protective activity; best…

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Signature Xtra Stressgard

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Signature Xtra Stressgard is a true systemic fungicide that controls tough turf diseases – pythium and anthracnose, as well as enhancing…

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Segway 400SC Fungicide

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Segway 400SC fungicide from ISK Biosciences is a revolutionary new fungicide, providing Australian turf managers with a reliable new tool in the fight…

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Magellan 800WG

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Magellan Fungicide is a targeted oomycete fungicide for the prevention and control of Phytophthora rots in ornamentals and Pythium in turf as specified…

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Bayer banol 400x400

Banol Systemic Fungicide is one of the most reliable and proven fungicides for Pythium control. It delivers preventative and curative protection…

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Subdue Maxx

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Subdue Maxx is a systemic and residual fungicide providing up to 21 days control, making it ideal for the control of…

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Heritage Maxx


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

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Headway Maxx


Headway Maxx combines the strength, longevity and broad spectrum of Heritage MAXX with the speed and early curative action of Banner…

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