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Keep Anthracnose under control this summer

Summer has arrived and along with it, heat and humidity: ideal conditions for diseases such as Anthracnose to thrive in even the most finely managed turfgrass.

For managers of greens such as Poa and Bent grass, now is a crucial time to ensure preventative and curative disease programs are in place to keep Anthracnose at bay.

Here are 5 tips to help you provide the most effective protection against disease infestation.

1. Reduce the stress your turfgrass is under.

Keeping your turf in good condition gives it a good chance of standing up to disease in summer. Steps you can take include decreasing foot traffic; lifting mowing heights where possible; maintaining adequate nitrogen and balanced fertility; reducing compaction once an infection has been controlled.

2. Maintain a dry leaf surface for as long as possible.

Although easier said than done, when humidity levels soar to around 80% in summer, a dry leaf surface is key to minimising outbreaks of Anthracnose. Make sure you irrigate the turfgrass just enough to prevent wilting, and avoid management practices that encourage humidity and extended leaf wetness.

3. Keep a close eye on your turfgrass for signs of disease.

Anthracnose is diagnosed through the presence of ‘acervuli’ – a fruiting body with hair-like setae that erupts from the plant. Although the disease eventually spreads to Bent grass, in most circumstances, symptoms will appear in the Poa annua, which will turn yellow before browning out and dying off. 

4. Have a fungicide program in place.

In times of high summer stress, effective fungicide programing is an important component of disease prevention. One good option is Syngenta’s VELISTA: a powerful broad spectrum fungicide that keeps turf in excellent condition, especially when high temperatures and humidity become an issue.

5. Don’t forget about other diseases.

Anthracnose is not the only disease that flourishes in high humidity and high temperatures. Applying a broad spectrum fungicide like VELISTA can help prevent a variety of different diseases in addition to Anthracnose, such as Brown Patch, Dollar Spot, Curvularia Leaf Spot and in the late summer and autumn, Spring Dead Spot.

It is also a good idea to choose a rotational partner for your fungicide to minimise the risk of fungicide resistance – one that belongs to a diffierent SDHI group. Fungicides that offer excellent control and work well with VELISTA are HEADWAY MAXX, BANNER MAXX, INSTRATA and MEDALLION.

Beat Anthracnose with VELISTA

VELISTA, Syngenta’s newly registered broad spectrum fungicide, provides excellent control for Anthracnose – especially when applied to the crown of the plant so that new growth is treated. Its benefits include:

  • quick knockdown and long-lasting protection against Anthracnose and other diseases
  • a new mode of action as a SDHI Group 7 fungicide – this provides a new family of chemistry for Anthracnose control and helps prevent disease resistance
  • no growth retardant effects, so it will not slow down growth late in the summer season
  • no plant phytoxicity – suitable for late summer applications

To get on top of any potential disease problems and Anthracnose outbreaks throughout summer, now is the time to act – both to prevent and to cure.