Drechslera

  • Scientific Name: Drechslera spp

Drechslera

Causal Agent

Drechslera spp.

What is Drechslera?

Drechslera is turf disease growing under stressful conditions, particularly in poorly draining profiles and areas with shade issues. Early symptoms of drechslera may include the appearance of small, water-soaked lesions on infected foliage.

What are the symptoms of Drechslera?

Symptoms of Drechslera include:

  • Small, water-soaked lesions may initially appear in infected foliage. 

  • Lesions may then become dark reddish purple to brown in colour with a yellow chlorotic margin. 

  • Deepening of lesions occurs until lesions become pitted and ulcerous in appearance, resulting in the angled collapse of infected leaf blades. 

  • Lesions are generally ovular to oblong in shape, running parallel to the leaf blade or rhizome and as they enlarge they may coalesce to blight entire leaves. 

  • Patchy blighted areas of turf may result in melting out of large areas, where turf becomes thin and unthrifty. 

  • Crown and root rot may also occur resulting in wilting and chlorosis.

What turfgrasses are especially susceptible to Drechslera?

Cool season turfgrasses.

When does Drechslera occur?

Conditions that are particularly favourable to Drechslera include:

  • Drechslera is active year-round with a temperature range for conidia germination of 3-27°C and an optimum temperature of 15-18°C.

  • The pathogen has survival mechanisms allowing it to persist through temperature extremes of hot and cold.

  • Cool wet conditions are most favourable for leaf spot symptoms to occur.

  • Moisture on the leaf surface is necessary for infection to occur.

  • Poor air movement (high humidity in the micro-climate).

  • Excessive nitrogen fertiliser.

  • Excessive thatch and loose leaf clippings provide a source of food for the fungus.

  • Any stress situation such as drought, herbicide injury or heavy traffic can increase the severity of the disease.

What can I do to manage or control Drechslera?

Management practices that can help control or reduce instances of Drechslera include:

  • Maintaining healthy turf through proper fertilisation. Pay particular attention to potassium and nitrogen levels. 

  • Avoiding overstimulating the plant through excessive fertilisation, particularly of nitrogen.

  • Irrigating infrequently and deeply

For chemical solutions and treatments for Drechslera, please see the recommended products below.

PRODUCT SOLUTIONS FOR Drechslera

Daconil Weatherstik® Turf Fungicide
Active: 720g/L Chlorothalonil

Daconil Weather Stik is a contact fungicide that can be used in preventative programs. It can be used as an early curative after the first signs of...

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Headway Maxx Fungicide
Active: 62g/l Azoxystrobin, 104g/l Propiconazole

Headway Maxx combines the strength, longevity and broad spectrum of Heritage Maxx with the speed and early curative action of Banner Maxx in an unb...

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Instrata Turf Fungicide
Active: 36.2% Chlorothalonil, 5.7% Propiconazole...

Instrata is an excellent choice for use in a preventative program or curatively after first symptoms are evident.

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Medallion Turf Fungicide
Active: 125g/l Fludioxonil

Medallion Turf Fungicide offers contact plus – exceptional spore busting capabilities on the leaf, in the thatch, and on the soil surface.

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Dedicate Turf and Ornamental Fungicide
Active: 100g/L Trifloxystrobin, 200g/L Tebuconazole

Dedicate turf fungicide contains two active ingredients with two different modes of action, providing curative and preventative control. It has a c...

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Chloronil Pro Fungicide
Active: 750g/L Chlorothalonil

Chloronil Pro Fungicide is a broad spectrum, contact or protectant fungicide for the control of a range of diseases fruit, vegetables and turf. It ...

Pack:
QTY:
- +
$324.50
Impala Fungicide
Active: 96g/l Azoxystrobin, 194g/l Triticonazole

Impala is formulated for broad spectrum control of fungal diseases in turf.

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Vantage Fungicide
Active: 95g/L Azoxystrobin

Vantage fungicide is a broad spectrum, systemic fungicide containing 95 g/L of the active constituent Azoxystrobin, a trusted chemistry for Austral...

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Nuturf is a division of Australian Agribusiness (Holdings) Pty Ltd ABN 61 135 355 958

 

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