Frequently Asked Questions

Forefront

Aminopyralid is one of the active ingredients found in Forefront® and Forefront T. It provides farmers with excellent control of weeds in grassland - including docks, nettles and thistles. There are some restrictions on the label concerning following crops and manure that do need to be followed.

Aminopyralid is readily absorbed by many plants, including grass, where it binds to a number of cellular structures.  When the plant tissues decay, aminopyralid is released and broken down by soil microbes. Any susceptible plants present at the time of decay of plant tissues may be affected.

 

There are some new approvals for Pastor, Doxstar, Grazon 90 and Thistlex. What does this mean for their use this year?
What crops can be drilled in a field following an application of Forefront T?
When can fodder beet be planted following an application of Forefront T?
What about the manure/compost/slurry from animals fed on grass (grazed grass, silage, hay) that has been treated with aminopyralid?
How long does it take for manure/slurry to break down?
What about bales of hay or silage that have spoiled, making them no longer suitable for feeding to livestock?
Can farmers sell manure/compost/slurry from animals fed on aminopyralid-treated grass/hay/silage?
Must Forefront T be used at 2.0 L/ha?
If Forefront T is so good, is it necessary to spray the same field the following year?
Will any Dow AgroSciences product control ragwort in horse paddocks?
Will Doxstar Pro, Forefront T or Pastor control large flowering docks?
Will Grazon Pro control chickweed?
What water volumes do I need to control docks in established grassland with Doxstar Pro?
What is the knapsack rate for Doxstar Pro, Forefront T, Pastor and Thistlex?
What rate of Grazon Pro should be applied through a knapsack ?
Can Doxstar Pro, Forefront T, Pastor, Thistlex or Grazon Pro be used on new leys (<12 months old)?
Can I use Grazon Pro on my lawn?
What is the stock exclusion period for horses for Doxstar Pro, Grazon Pro, Pastor and Thistlex?
What is the stock exclusion period for hens?
How rainfast is Grazon Pro?
Can Doxstar Pro, Forefront T, Pastor, Thistlex or Grazon Pro be tank mixed with MCPA or 2,4-D?
Can I apply Pastor through a Knapsack?
Will Pastor control thistles?
What is the grazing/cutting interval after application of Pastor?
Will Thistlex control dandelions?
What is the grazing interval for Grazon Pro?

There are some new approvals for Pastor, Doxstar, Grazon 90 and Thistlex. What does this mean for their use this year?

Doxstar (MAPP no 11063) and Grazon 90 (MAPP no 13117) will no longer be available for sale and distribution after 30th June 2013. End users will then have until 30th June 2014 to use up any remaining stocks.

Doxstar® will be replaced with Doxstar PRO (MAPP no 15664) and Grazon® 90 will be replaced with Grazon PRO (15785). There are some differences in label recommendations.

The Pastor® name and MAPP number (MAPP no 11168) remain unchanged but there have been some changes to the label recommendations. Existing stocks of Pastor with the old label will no longer be available for sale and distribution after 30th June 2013. End users will then have until 30th June 2014 to use up any remaining stocks.

Doxstar PRO, Grazon PRO and Pastor will be available from 2013.

More information can be found here

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What crops can be drilled in a field following an application of Forefront T?

Ensure the sward has been destroyed and the land ploughed. Leave at least 3-4 months before drilling crops other than grass or wheat.

  • After one month - only grass or wheat can be planted
  • After four months - cereals, OSR, maize, grass/clover mix (stitched in) or clover (stitched in) can be planted
  • In the calendar year following an application - only cereals, OSR, maize, grass/clover mix (stitched in) or clover (stitched in) can be planted
  • In the second calendar year following an application - cereals, OSR, maize, grass/clover mix (stitched in) or clover (stitched in), peas, beans and other legumes, sugar beet, vegetables and potatoes can all be planted

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When can fodder beet be planted following an application of Forefront T?

The same applies as to sugar beet - wait until the second calendar year following an application before drilling.

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What about the manure/compost/slurry from animals fed on grass (grazed grass, silage, hay) that has been treated with aminopyralid?

FOREFRONT T must only be applied to established grassland intended for grazing in the calendar year of application.

Manure or slurry from animals fed on grass treated with aminopyralid must stay on farm and can only be spread onto grassland.

Where silage, hay or haylage is produced from this area in the following calendar year, it must stay on the farm and any manure subsequently produced from animals fed on this must stay on the farm. This manure should only be spread onto agricultural grassland.

DO NOT use plant material treated with Forefront T for composting or mulching.

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How long does it take for manure/slurry to break down?

Once spread on the soil, this will be dependent upon many different factors such as soil type, temperature, aeration of the soil, compaction etc. Therefore, it is impossible to give a timescale as each situation will be different.  Ensure that all plant remains have completely decayed before planting sensitive crops.

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What about bales of hay or silage that have spoiled, making them no longer suitable for feeding to livestock?

They should be considered as manure - and spread onto grass as explained above.

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Can farmers sell manure/compost/slurry from animals fed on aminopyralid-treated grass/hay/silage?

No. Manure produced from these animals must stay on the farm.

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Must Forefront T be used at 2.0 L/ha?

Yes. Applications at anything less than the recommended rate is likely to lead to disappointing results. The use of lower dose rates leads to lower performance, both in initial levels of weed control and in long-term control. Dow AgroSciences only support the label application rate of 2.0 L/ha.

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If Forefront T is so good, is it necessary to spray the same field the following year?

With the very high levels of control that can be achieved 18 months after applying Forefront T, it is very possible that the same field will not need re-treating the following year. However, if initial weed populations are particularly high or further weed emergence occurs after application, treatment may be needed the following year. Also, if the first application of Forefront T is made to weeds at the wrong growth stage or during poor weather conditions, treatment may be needed the following year.

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Will any Dow AgroSciences product control ragwort in horse paddocks?

No Dow AgroSciences product is recommended for control of ragwort in horse paddocks. The best method of control is to dig them up. 2,4-D can be used as an overall spray.

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Will Doxstar Pro, Forefront T or Pastor control large flowering docks?

No. They must be topped and allowed to regrow. Treatments should then be made under good growing conditions to actively growing plants when they reach the rosette stage. See Critical Success Factors.

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Will Grazon Pro control chickweed?

No, but Doxstar Pro, Forefront T and Pastor all give excellent control when applied under the correct conditions.

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What water volumes do I need to control docks in established grassland with Doxstar Pro?

Whenever Doxstar Pro is used in established grassland the rate of water should always be 300-400 L/ha.

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What is the knapsack rate for Doxstar Pro, Forefront T, Pastor and Thistlex?

These products are not recommended for application through a knapsack. Grazon Pro at 60 ml in 10 litres of water is the best product for spot treatment.

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What rate of Grazon Pro should be applied through a knapsack ?

60 ml of Grazon Pro in 10 litres water.

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Can Doxstar Pro, Forefront T, Pastor, Thistlex or Grazon Pro be used on new leys (<12 months old)?

No. Grassland should be at least 12 months old for all of the above products.

Doxstar (MAPP no11063) and old label Pastor have approval for use on new leys until June 2014.

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Can I use Grazon Pro on my lawn?

No. Grazon Pro is a professional product recommended for use only as an agricultural herbicide.

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What is the stock exclusion period for horses for Doxstar Pro, Grazon Pro, Pastor and Thistlex?

The same as for livestock: 7 days and until foliage of any poisonous weeds such as ragwort has died and become unpalatable.

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What is the stock exclusion period for hens?

The same as for livestock: 7 days and until foliage of any poisonous weeds such as ragwort has died and become unpalatable.

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How rainfast is Grazon Pro?

If Grazon Pro is applied to a dry leaf it will be rainfast in 2 hours.

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Can Doxstar Pro, Forefront T, Pastor, Thistlex or Grazon Pro be tank mixed with MCPA or 2,4-D?

This approach is not recommended and is not supported by Dow AgroSciences. Quick 'burn down' of top growth with phenoxy herbicides can hinder movement of the translocated active ingredients in Doxstar Pro, Forefront T, Pastor, Thistlex® and Grazon Pro to the roots, leading to poor levels of weed control.

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Can I apply Pastor through a Knapsack?

No. There is no approval for hand-held application of Pastor.

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Will Pastor control thistles?

Yes. Apply at 4.0 L/ha.

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What is the grazing/cutting interval after application of Pastor?

7 days for grazing and 28 dasy if grass is being harvested. The 7 day exclusion period may need to be extended if poisonous weeds are present.

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Will Thistlex control dandelions?

Yes but it is not an 'on label' weed. Consider topping dandelions and then applying Thistlex 203 weeks later at the rosette stage of the weed.

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What is the grazing interval for Grazon Pro?

7 days. Allow 28 is cutting the field for silage or hay. The 7 day exclusion period may need to be extended if poisonous weeds are present.

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