ZephyrPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

A fungicide for the control of foliar and ear disease in winter and spring wheat, durum wheat, rye, triticale and winter and spring barley.

Other specific restrictions: To reduce the risk of resistance developing in target diseases the total number of applications of products containing Qol fungicides made to any cereal crop must not exceed two.

DIRECTIONS FOR USE
IMPORTANT: This information is approved as part of the Product Label. All instructions within this section must be read carefully in order to obtain safe and successful use of this product.
Zephyr is a triazole and strobilurin fungicide recommended for control of a wide range of diseases on winter and spring barley, winter and spring wheat, durum wheat, rye and triticale.
RESTRICTIONS
PROTECT FROM FROST

DISEASES CONTROLLED
Wheat, Durum Wheat and Triticale
Eyespot, Septoria (leaf and glume blotch), powdery mildew, yellow rust, brown rust, ear disease complex* – Fusarium ear blight.
* good reduction

Barley
Eyespot*, powdery mildew, yellow rust, brown rust, Rhynchosporium and net blotch.

Rye
Eyespot, powdery mildew, brown rust and Rhynchosporium.
* reduces the incidence and severity

Eyespot (Oculimacula spp.)
Zephyr controls eyespot in wheat, triticale and rye and reduces the incidence and severity in barley. Spray in the spring at the first sign of disease, from when the leaf sheaths begin to become erect until the 2nd node is detectable (GS 30-32).

Septoria Leaf Blotch and Glume Blotch (Septoria tritici and Stagonospora nodorum)
Apply before disease is established in the crop. To protect the upper leaves and ear apply Zephyr at full flag leaf emergence (GS 39) up to mid-flowering (GS 65). Where disease pressure remains high
application may be repeated.
Applications to upper leaves where S. tritici symptoms are present are likely to be less effective.
Zephyr contains a DMI fungicide. Resistance to some DMI fungicides has been identified in Septoria leaf blotch (Mycosphaerella graminicola) which may seriously affect the performance of some
products. For further advice on resistance management in DMI’s contact your agronomist or specialist advisor, and visit the FRAG-UK website.

Powdery Mildew (Blumeria graminis)
Apply Zephyr at the first signs of disease. Zephyr controls mildew in barley and when used for control of other diseases will also give control of powdery mildew in wheat, durum wheat, triticale and rye. Where disease pressure remains high application may be repeated.
Strains of wheat and barley powdery mildew resistant to Qol fungicides are common in the UK. Where specific control of wheat mildew is required, this should be achieved through a programme
of measures, including products with recommendations for control of mildew that contain different active substances used in mixture or sequence.

Yellow Rust (Puccinia striiformis)
Apply Zephyr at the first signs of disease. A second application may be made 2-3 weeks later if re-infection occurs. Applications made to established infections are likely to be less effective.

Brown Rust (Puccinia hordei. P. recondita)
Apply Zephyr at the first signs of disease. A second application may be made 2-3 weeks later if re-infection occurs. Applications made to established infections are likely to be less effective.

Ear Disease Complex
Apply Zephyr soon after ear emergence until the end of flowering (GS59-69) for good reduction of Fusarium ear blight and reduction of sooty moulds in wheat. Control of ear diseases can result in cleaner, brighter ears.

Leaf Blotch (Rhynchosporium secalis)
Zephyr gives high levels of Rhynchosporium control. Apply Zephyr in spring at the first signs of disease. For severe infections a second application may be necessary 2-3 weeks later.

Net Blotch (Pyrenophora teres)
Apply Zephyr at the first signs of disease in spring/early summer. For severe infections, a second application 2-3 weeks later will give most effective control when conditions remain favourable for disease development.

CROP SPECIFIC INFORMATION
Zephyr may be used on all commercial varieties of winter and spring barley, winter and spring wheat, durum wheat, triticale and rye.
Apply Zephyr at 1.0 litres per hectare in winter and spring wheat, durum wheat, triticale and rye and 0.75 litre per hectare in barley.
The maximum total dose per crop is: 2.0 litres per hectare per crop in winter and spring wheat, durum wheat, triticale and rye and 1.5 litres per hectare per crop in barley Apply Zephyr in 100-300 litres of water per hectare.
The higher spray volumes are recommended where the crop is dense or disease pressure/risk is high to ensure good penetration to the lower leaves and stem bases. Disease control may be compromised by reducing water volumes, where good spray coverage is difficult to achieve.
A spray pressure of 2-3 bar is recommended.
Apply as a MEDIUM spray quality (as defined by BCPC).

Latest Permitted Timing
Zephyr may be applied at any stage before grain milky ripe stage (GS 71) in winter and spring wheat, durum wheat, triticale and rye and up to beginning of anthesis (GS 61) in winter and spring
barley.

MIXING AND SPRAYING
Thoroughly shake the pack before use.
Add the required quantity of Zephyr to the half-filled spray tank with the agitation system in operation and then fill to the required level. Continue agitation at all times during spraying and stoppages until the tank is completely empty. Spray immediately after mixing.
Sprayers should be thoroughly cleaned before use, and filters and jets checked for damage and blockages.
Boom height should be adjusted to ensure even coverage of the crop, particularly at later growth stages. The correct height is one at which the spray from alternate nozzles meets just above the crop, In dense crops, at later growth stages, higher water volumes should be used.
Spray equipment should be thoroughly cleaned with water and detergent after use.

RESISTANCE
Apply fungicides according to the manufacturer’s recommendations for the target disease (or complex) at the specific crop GS indicated.
Effective disease management is a critical parameter in delaying the build-up of resistant pathogen populations. Zephyr is a mixture of two fungicides with different modes of action, a strobilurin and a triazolinthione.
Zephyr contains trifloxystrobin, a member of the QoI cross-resistance group. Zephyr should be used preventatively and should not be relied on for its curative potential.
Use Zephyr as part of an Integrated Crop
Management (ICM) strategy incorporating other methods of control, including where appropriate other fungicides with a different mode of action. You must not apply more than two foliar applications of QoI-containing products to any cereal crop.
Strains of wheat and barley powdery mildew resistant to QoI’s are common in the UK.
There is a significant risk of widespread resistance occurring in Septoria tritici populations in the UK. Failure to follow resistance management action may result in reduced levels of disease control.
Use of fungicides which have different modes of action have been shown to protect against the development of resistant forms of disease.
A programme of sprays should include no more than two sprays of Zephyr or any other product that contains a strobilurin fungicide.
Limiting the number of sprays is an important factor in delaying the build-up of resistant pathogen populations. Failure to follow resistance management action may result in reduced levels of disease control. Appropriate disease risk assessment or decision support systems must be used when deciding whether to treat with Zephyr.

CAUTION
The possible development of resistance to Zephyr cannot be predicted. Should it occur Zephyr may not give satisfactory control and no responsibility can be accepted for any loss incurred.