Drechslera

Causal Agent: Drechslera spp.

Susceptible Turfgrasses: Cool season turfgrasses.

Symptoms

  • 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.

Conditions Favouring Disease

  • 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.

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Products to Use Drechslera

Vantage Fungicide

Amgrow-Vantage-5L_bottle copy

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

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Bayfidan

BYFIDAN NEW

25% Triademinol Bayfidan is a broad spectrum, systemic foliar fungicide that is rapidly taken up by plants and translocated within the…

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Patchwork

Patchwork bottle

25% Triademinol Patchwork is a broad spectrum fungicide containing 250 g/L of the active ingredient Triadimenol. It is specifically registered for…

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Impala

Impala for web

Impala is formulated for broad spectrum control of fungal diseases in turf. The new active constituent triticonazole brings higher efficacy from…

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TMTD 600

TMTD v2

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

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Fore Rainshield

Fore Rainshield pack

48% Mancozeb Fore Rainshield is a broad spectrum protectant fungicide containing 480g/L of the active ingredient Mancozeb formulation offers superior spreading…

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Medallion Turf Fungicide

ImageGen

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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Chloronil Pro

Chloranil pro v2

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

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Dedicate

NEW Dedicate_1L_Straight_RGB

10% Trifloxystrobin + 20% Tebuconazole Dedicate turf fungicide contains two active ingredients with two different modes of action, providing curative and…

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Instrata

Instrata 10L bottle

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

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Headway Maxx

Headway_Maxx_5L_Can_LR

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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Daconil Weather Stik

Daconil10L_SML_LR

Daconil Weather Stik is a contact fungicide that can be used in preventative programs. It can be used as an early…

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Banner Maxx

BannerMaxx5L_LR

Banner Maxx is an excellent choice as an early curative treatment, providing systemic broad spectrum control of major turf diseases including…

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