AmistarPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

FORMULATION & ACTIVE INGREDIENT: AMISTAR is a suspension concentrate containing 250 g/l (23.1% w/w) azoxystrobin.
AMISTAR contains azoxystrobin for the control of a range of fungal diseases in a range of crops

 

IMPORTANT: This information is approved as part of the Product Label. All instructions within this section must be carefully read in order to obtain safe and successful use of this product.

 

GENERAL INFORMATION
AMISTAR contains azoxystrobin, a broad spectrum fungicide from the strobilurin group. It has systemic, translaminar and protectant properties.
Azoxystrobin inhibits fungal respiration. Its mode of action is different from the action of other fungicidal groups. It should always be used in mixture with fungicides with other modes of action.
AMISTAR shows good crop safety, disease control and maintenance of green leaf area which result in significant yield benefits.
AMISTAR is best used as a protective treatment or during early stages of disease establishment. In cereals, the length of disease control is generally about four to six weeks during the period of active stem elongation, but can be more when applied at flag leaf/ear emergence.
AMISTAR is approved for application to wheat, barley, rye, triticale and oats up to the grain watery ripe stage, and to combining and vining peas, bulb onions, leeks, carrots, asparagus field beans, potatoes, oilseed rape, Brussels sprouts, cabbage, cauliflower, kale (winter greens), collards (spring greens), broccoli and calabrese (see Statutory area).

RESTRICTIONS
Certain apple varieties are highly sensitive to AMISTAR. As a precaution AMISTAR should not be applied when there is a risk of spray drift onto neighbouring apple crops. Spray equipment used to apply AMISTAR to other crops should not be used to treat apples.

 

Leaf Spot (Septoria tritici) Glume Blotch (Leptosphaeria (syn. Septoria) nodorum) Yellow Rust (Puccinia striiformis) Brown Rust (Puccinia recondita) Ear Diseases (Cladosporium, Alternaria) Can reduce the severity of Take-all (Gaeumannomyces graminis var. Tritici)

Net Blotch (Pyrenophora teres) Brown Rust (Puccinia hordei) Powdery Mildew (Erysiphe graminis hordei) - moderate Leaf Blotch (Rhynchosporium secalis) – reduction Can reduce the severity of Take-all (Gaeumannomyces graminis var. Tritici

Crown Rust (Puccinia coronata) Powdery Mildew (Erysiphe graminis f.sp.avenae)- moderate

Brown Rust (Puccinia recondita) Leaf Blotch (Rhynchosporium secalis) - reduction Powdery Mildew (Erysiphe graminis) - moderate Can reduce the severity of Take-all (Gaeumannomyces graminis var. Tritici)

Leaf and Pod Spot (Ascochyta pisi) – useful control When AMISTAR is used to control leaf and pod spot, some control of Grey Mould (Botrytis cinerea) and Mycosphaerella blight may be achieved.

Downy mildew (Peronospora destructor) Leeks Leaf rust (Puccinia porri) Purple blotch (Alternaria porri) - moderate Carrots Alternaria leaf blight (Alternaria dauci) Powdery mildew (Erysiphe polygoni)

Stemphylium (Stemphylium botryosum)Rust (Puccinia asparagi)

Rust (Uromyces vicae-fabae) Potatoes For the reduction of soil-borne infections caused by: Stem canker and Black scurf (Rhizoctonia solani) Black dot (Colletotrichum coccodes)

Dark Leaf and Pod Spot (Alternaria spp.) Sclerotinia stem rot (S. sclerotiorum)

For moderate control of: White blister (Albugo candida) Ring spot (Mycosphaerella brassicicola) Alternaria (Alternaria brassicae and Alternaria brassicicola)

 

AMISTAR can be used on all winter and spring crops of wheat and barley, oats, rye and triticale. It can also be used on combining and vining peas, onions, leeks, carrots, asparagus, field beans, oilseed rape, potatoes, Brussels sprouts, cabbage, cauliflower, kale (winter greens), collards (spring greens), broccoli and calabrese.

 

Always inspect crops to assess disease development immediately before spraying. Best results will be achieved from applications made in the earliest stages of disease development or as a protectant treatment following a disease risk assessment or the use of appropriate decision support systems. For protection against ear disease (Cladosporium and Alternaria) apply AMISTAR at ear emergence. When used to control the listed foliar diseases, AMISTAR applied at the first or second node stage of the crop can reduce the severity of Take-all infection.

1.0 litre per hectare.

The maximum number of applications to any cereal crop is two per crop.

 

On cereal crops, AMISTAR must always be used in mixture with another product, recommended for control of the same target disease that contains a fungicide from a different cross resistance group and is applied at a dose that will give robust control.

 

Use AMISTAR 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 Qol-containing products to any cereal crop. There is significant risk of widespread Qol resistance occurring in Septoria tritici populations in the UK. Failure to follow resistance management action may result in reduced levels of disease control. Strains of barley powdery mildew resistant to Qol’s are common in the UK. Disease control may be reduced if strains of other pathogens less sensitive to azoxystrobin develop. On cereal crops, AMISTAR must always be used in mixture with another product, recommended for control of the same target disease that contains a fungicide from a different cross resistance group and is applied at a dose that will give robust control. Users should refer to current FRAG-UK guidelines for Qol compounds.

 

Always inspect crops to assess disease development immediately before spraying. Best results will be achieved from applications made in the earliest stage of disease development or as a protectant treatment following a disease risk assessment or the use of appropriate decision support systems.

 

When used to control the listed foliar diseases in rye and triticale, AMISTAR applied at the first or second node stage of the crop can reduce the severity of Take-all  infection.

 

1.1  litre perhectare.

The maximum number of applications to any cereal crop is two per  crop

 

On cereal crops, AMISTAR must always be used in mixture with another product, recommended for control of the same target disease that contains a fungicide from a different cross resistance group and is applied at a dose that will give robust  control.

 

Use AMISTAR 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 Qol-containing products to any cereal  crop. 

There is significant risk of widespread Qol resistance occurring in Septoria tritici populations in the UK. Failure to follow resistance management action may result in reduced levels of disease control. 

Disease control may be reduced if strains of other pathogens less sensitive to azoxystrobin develop. 

On cereal crops, AMISTAR must always be used in mixture with another product, recommended for control of the same target disease that contains a fungicide from a different cross resistance group and is applied at a dose that will give robust  control. 

Users should refer to current FRAG-UK guidelines for Qol compounds.

 

AMISTAR should always be used at the first sign of disease infection or when a predictive assessment shows conditions favourable for disease development. For optimum disease control apply AMISTAR before infection or as soon as disease is first seen in the crop. Always inspect crops to assess disease development immediately before spraying. Best results will be achieved from applications made in the earliest stage of disease development or as a protectant treatment following a disease risk assessment or the use of appropriate decision support systems.

 

1.2  litre perhectare.

A second treatment may be required if disease pressure remains high – especially in combining peas.

 

Where a crop of peas is destined for processing, consult your processor before treating with AMISTAR. (One year’s results indicate that no taints were detected on quick frozen, canned, vining or canned combining peas).

 

AMISTAR shows good crop safety on combining and vining peas. Before applying ensure the crop is free from any stress caused by environment or agronomic effects. Check wax level if necessary using the Crystal Violet test.

  

To avoid the likelihood of resistance developing, application of AMISTAR should be made with due regard to current FRAG-UK guidelines for Qol compounds. Do not make more than two applications  of AMISTAR to crops of combining and vining  peas.

 

Before applying AMISTAR, ensure the crop is free from any stress caused by environmental or agronomic effects. For optimum disease control AMISTAR should be used at the first sign of disease infection or preferably preventatively when a predictive assessment shows conditions favourable

for disease development. Always inspect crops to assess disease development immediately before spraying.  Best results will be achieved from applications made in the earliest stage of

disease development or as a protectant treatment following a disease risk assessment or the use of appropriate decision support systems.

1.0 litre per hectare

 

Bulb Onion
For optimum downy mildew control in bulb onions a 7 to 10 day spray interval should be   maintained
Applications to established downy mildew infection are unlikely to give reliable  control

Where a crop is destined for processing, consult your processor before treating with AMISTAR

Use AMISTAR 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.

To avoid the likelihood of resistance developing, applications of AMISTAR should be made with due regard to current FRAC guidelines for Qol compounds as illustrated below in the following  table:

 

Always inspect crops to assess disease development immediately before spraying. Best results will be achieved from applications made in the earliest stages of disease development or as a protectant treatment following a disease risk assessment or the use of appropriate disease supportsystems.

Earliest time of application: After commercial cutting AMISTAR may only be applied after the harvest season (i.e. after commercial cutting). Where a new ‘bed’ is established, do not treat within three weeks of transplanting out the crowns.

The application interval between subsequent treatments should be 8 to 12 days.

Latest time of application: until the end of September or before the crop senescence, whichever is sooner

AMISTAR shows good crop safety on asparagus. Before applying ensure the crop is free from any stress caused by environmental or agronomic effects.

1.0 litre per hectare.

Resistance Management

AMISTAR contains azoxystrobin a member of the Qol cross resistance group. AMISTAR should be used preventatively and should not be relied on for its curative potential. Disease control may be reduced if strains of pathogens less sensitive to azoxystrobin develop

 

Before applying AMISTAR, ensure the crop is free from any stress caused by environmental or agronomic effects. Always inspect crops to assess disease development immediately before spraying. Best results will be achieved from applications made in the earliest stage of disease development or as  a protectant treatment following a disease risk assessment or the use of appropriate decision support systems

A second treatment may be required if disease pressure remains high

1 litre per hectare

 

To avoid the likelihood of resistance developing, application of AMISTAR should be made with due regard to current FRAG-UK guidelines for Qol compounds.  Do not make more than two  applications.

of AMISTAR to crops of field beans. Use AMISTAR 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

 

AMISTAR must be applied as either an overall and incorporated application made prior to planting or as an in-furrow application made at the time of  planting

Where AMISTAR is applied as an overall and incorporated treatment, apply the product as an overall spray on the entire area to be planted. Apply as a coarse quality spray preferably through air-induction nozzles, the nozzles to be mounted 50 cm above the soil. Immediately after application AMISTAR should be incorporated into the soil to a depth of approximately 15 cm and then the potato crop    should be planted.  Planting should occur on the same day as  application.

Where AMISTAR is applied as an in-furrow application, it is important to direct the spray into the planting furrow and not onto the seed tuber. Application should be made using two nozzles per row – one at the front of the planting share and directed down into the furrow and the second, at the rear of the share and directed so as to spray the soil as it closes around the planted  tuber.

For overall and incorporated application made prior to planting: 6.0 litres per hectare OR

For in-furrow application made at planting: 3 litre per hectare

With both methods of treatment, a maximum of one application per crop should be  made

 

With in-furrow application, always target the soil and not the seed tuber in order to minimise any possible delay in emergence. Wherever possible, use properly chitted seed or cold-stored seed which has not started to sprout. Using seed which has just broken dormancy may well result in emergence delays

Using AMISTAR following earlier applications of imazalil, pencycuron or imazalil/pencycuron is likely to lead to a check in the speed of crop emergence. Effects are usually, but not always,  outgrown

 

Do not use AMISTAR on high organic matter soils as the product will not be  effective

 

Where a crop of potatoes is destined for processing, consult processors before treating with AMISTAR.

The risk of resistance developing to AMISTAR in Rhizoctonia solani (Black scurf and Stem canker) is considered to be very low. The resistance risk is higher for Colletotrichum coccodes (Black dot) and   to minimise this potential risk, tubers from crops treated with AMISTAR should not be used for seed. AMISTAR should only be used in potato crops, which adhere to good rotation  practices.

To avoid the likelihood of resistance developing to QoI compounds used to control potato late blight, application of AMISTAR should be made with due regard to current FRAG-UK guidelines for QoI.

compounds. If an application of AMISTAR is made, no more than two further QoI treatments should be applied sequentially as the first sprays against blight before using an alternative product

 

Before applying AMISTAR, ensure the crop is free from any stress caused by environmental or agronomic effects. Best results will be achieved from applications made as a protectant treatment following a disease risk assessment or the use of appropriate decision support systems.

A second treatment may be required if disease pressure remains high

Sclerotinia – AMISTAR should be applied as a protectant spray during flowering. The optimum timing  is early flowering to mid flowering (GS60 –GS65)

Alternaria – Apply AMISTAR as a protective spray at early pod formation when the first ten pods are longer than 4 cm, before they become knobbly and not later than the time the first spots are seen on the pods.

Note: an application of AMISTAR against Sclerotinia will significantly limit the development of Alternaria

1 litre per hectare

To avoid the likelihood of resistance developing, application of AMISTAR should be made with due regard to current FRAG-UK guidelines for Qol compounds.  Do not make more than two applications  of AMISTAR to crops of oilseed rape. Use AMISTAR as part of an Integrated Crop Management (ICM) strategy incorporating other methods of control, including where appropriate other fungicides with a different mode ofaction.

 

Before applying AMISTAR, ensure the crop is free from any stress caused by environmental or agronomic effects. Always inspect crops to assess disease development immediately before spraying. Best results will be achieved from applications made in the earliest stage of disease development or as  a protectant treatment following a disease risk assessment or the use of appropriate decision support systems.

A second treatment may be required if disease pressure remains high. A minimum interval of 12 days must be observed between applications to  brassicae.

1 litre per hectare

To avoid the likelihood of resistance developing, application of AMISTAR should be made with due regard to current FRAG-UK guidelines for Qol compound. Do not apply more than a total of two applications of AMISTAR to any brassica crop.

 

Ensure that the sprayer is clean and correctly set to give an even application at the required volume. Half-fill the spray tank with clean water and start agitation. Shake the container and add the required amount of AMISTAR to the sprayer using a filling device (e.g. induction bowl or closed transfer unit) or by direct addition to the sprayer  tank.

 

Wash out containers thoroughly, preferably using an integrated pressure rinsing device, or manually rinse three times. Add washings to the sprayer at the time of filling. Complete filling to the required volume and continue to agitate throughout the spraying operation.

 

Do not leave the spray liquid in the sprayer for long periods (such as during meal breaks or overnight).

 

Apply using a medium quality spray (BCPC) at a pressure of at least 2 bar. Apply through conventional crop spraying equipment.

 

Apply in at least 200 litres of water per hectare.  In dense crops, increase the water volume to 250

–300 litres per hectare to improve coverage

 

For conventional tractor mounted crop spraying equipment, apply in at least 600 litres of water per hectare using a medium quality spray (BCPC) at a pressure of at least 2 bar.

For hand-held spraying equipment, apply in at least 200 litres of water per hectare.

 

For overall and incorporated application, use 200-400 litres of water per hectare. Apply only as a medium/coarse spray using either Pre-Orifice or Air-Induction nozzles. The type of nozzle used for soil acting herbicides should be suitable. During application, care should be taken to avoid drift onto any adjacent crops.

 

For in-furrow application, use between 50-150 litres of water per hectare. Apply using specialist in-furrow application equipment. Contact Syngenta UK Ltd for further details on suitable manufacturers of these sprayers.

 

Apply in at least 300 litre of water per hectare

 

Thoroughly wash out sprayer according to manufacturer’s guidelines and dispose of washing and clean containers according to DEFRA Code of Practice and local water authority guidelines.