250g Turf Fungicide for Red Thread and Dollar Spot Control

This is a professional strobilurin fungicide supplied as a 250g pack of water dispersible granules. Containing 200 g/l (20%) pyraclostrobin, it is a local penetrant with both protective and curative activity, authorised on managed amenity turf for control of red thread (Laetisaria fuciformis), microdochium patch (Microdochium nivale) and dollar spot (Sclerotinia homoeocarpa) while the turf is actively growing.

Key Features

• Controls red thread, microdochium patch and dollar spot
• Protective and curative action
• Local penetrant with translaminar movement, protecting inside the leaf and on both leaf surfaces
• Deposits held in the waxy cuticle act as a weather-resistant reservoir, giving protection over several weeks
• Pyraclostrobin targets more stages of the fungal life cycle than other strobilurins such as azoxystrobin
• Reliable performance at cooler temperatures; can be applied all year round between 5-25°C
• Rainfast within 1 hour of application
• Delivers plant health benefits beyond disease control

Active Substance: Pyraclostrobin

Pyraclostrobin belongs to the strobilurin family of fungicides.

Mode of Action

Mode of action describes the way a fungicide affects a fungus. The Fungicide Resistance Action Committee (FRAC) currently recognises 13 classifications, and pyraclostrobin falls under Mode of Action Code C: Respiration.

Target site of action and group name – as with many fungicides, pyraclostrobin acts on a single site within the fungus: complex III of the mitochondrial electron transport chain. Blocking this pathway stops the pathogen respiring and generating energy through electron transfer within its cells. Fungicides acting on this process are given the code C3 and the group name Quinone outside Inhibitors (QoI).

FRAC code – as a QoI fungicide, pyraclostrobin sits in FRAC code 11 for resistance management.

Phytomobility and Movement Through the Plant

Phytomobility is the way an active substance such as pyraclostrobin penetrates and travels within a plant once it has landed on, and been absorbed into, the underlying tissue.

• Local penetrant: after application, the active substance stays concentrated near the point where it was applied.
• Translaminar movement: the active passes through the leaf from one side to the other. 'Trans' comes from the Latin for 'through' or 'across', and 'lamina' is the botanical term for a leaf. This movement is also known as mesostemic.
• Apoplastic cell movement: the active travels through the leaf around the cell wall structure and through the gaps between plant cells until it reaches the opposite side. Apoplastic movement happens either within the cell walls or through the intercellular spaces.
• Lipophilic: the pyraclostrobin in this fungicide readily binds to lipids such as fats, oils and waxes. Most of it is therefore first held on or in the waxy cuticle, the outermost layer of the leaf, and after moving through the leaf it also binds to the cuticle on the far side.

Advantages of a Local Penetrant Fungicide

With translaminar movement through the plant and apoplastic movement between cells, this fungicide gives turf managers several key advantages when protecting grass from fungal pathogens:

• Protection inside the plant: as the active crosses the leaf, fungitoxic concentrations inside the leaf limit the growth of pathogens within the plant.
• Protection on both sides: translaminar movement builds up the active on the opposite side of the leaf, suppressing existing infections beneath where the fungicide was applied.
• Protection over time: because pyraclostrobin is attracted to the lipids in the waxy cuticle, deposits that build up on both sides of the leaf blade are retained. These act as a weather-resistant reservoir, releasing active across the leaf surface and into deeper tissue over several weeks to guard leaves and roots against new infection.

Strengthening Turf from the Inside Out

This fungicide offers extra benefits to the grass plant on top of direct disease control.

• As a fungicide, pyraclostrobin strongly inhibits mitochondrial respiration in the cells of pathogenic fungi, preventing the breakdown of carbon they need to produce energy.
• Within the grass plant itself, a slight inhibition of mitochondrial respiration sets off a chain of positive responses that lead to plant health benefits.

These benefits come from the way pyraclostrobin positively reorganises the plant's metabolic and physiological processes.

Alongside controlling fungal pathogens directly, this effect helps plants to:

• Resist disease attack
• Withstand abiotic environmental and physical stress
• Grow more efficiently

How to Use

Best results from any plant protection product depend on skilled application with well-calibrated equipment and the right choice of nozzles. Take account of the current weather conditions and the stage the disease has reached. This fungicide is best applied at the start of a disease attack.

• Suitable for application all year round at temperatures between 5-25°C
• Rainfast within 1 hour of application
• Authorised for a maximum of two applications in one year

Applications

• Managed amenity turf

Specifications

Notes

• This is a professional pesticide product. The purchaser and/or end user must make sure it is used in accordance with the industry Approved Codes of Practice, and all operators must be trained and certificated to use and apply Ministry Approved professional products.
• End users must follow the DEFRA/HSE Code for the Safe Use of Pesticides: by law, anyone using pesticides professionally must have had adequate training in safe pesticide use and be skilled in the work they are doing.