Welcome to the Corteva™ Agriscience
Forage Agronomy Update for Ireland
These regular technical notes are a seasonal commentary to help those interested in improving grassland and forage productivity on dairy, beef, sheep and equestrian enterprises. This will be our last update of this season, we'll be back next year with more support and advice.
You can claim 10 IASIS points for subscribing to this email update.
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Temperature and end of season use for ProClova XL | Using Drift Reducing Nozzles when applying ProClova XL | Last use dates for Corteva grassland herbicides | Weed control using a knapsack | Autumn weed control of docks | Late season control of buttercups | Chickweed control in the autumn | Corteva Forage App | Cattle, sheep, tractors and more! | FAQs | IASIS points
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Temperature and end of season use for ProClova XL
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In newly sown leys and established grassland, application of ProClova® XL may take place up to 31st October.
You must consider overnight temperatures. For optimal results spray when overnight temperatures are forecast to be above 8°C for a period of 3 days before and 3 days after the planned application date.
At these temperatures and above, any transient effect on clover and reduction in weed control levels will be minimised. Analysis of average overnight temperatures over the last 5 years indicates that applications in September tend to meet this requirement. Opportunities to spray in October are likely to be minimised.
For more best practice advice, please visit:
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Using Drift Reducing Nozzles when applying ProClova XL
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ProClova® XL must be applied with drift reducing nozzles (DRN) with a minimum 75% drift reduction rating. See below for the list of nozzles which meet this requirement when applying ProClova XL at 200L water/ha.
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To help farmers switch to DRN, Corteva is running a Drift Reducing Nozzle offer. This initiative provides farmers with €100 goodwill gesture towards the cost of DRN nozzles when purchased alongside ProClova® XL.
Product purchases need to have been made between 1st June 2024 and 30th September 2024. The deadline for completing claims is 30th September 2024.
For further details about Corteva's DRN offer, please click here.
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Last use dates for Corteva grassland herbicides
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Active growth is a normal requirement for good translocation of herbicide into roots to achieve a good level of control.
As day length reduces and temperatures drop, active growth will slow down. In response to these changes, consideration must be made when choosing to make a recommendation or when undertaking an application. Further to this, be aware of the cut off dates for application.
Please note that the application window for Pastor® Trio on newly sown leys is now closed - cut off was 31st August.
If the intended use is on established grassland however, applications can continue until 30th September.
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Weed control using a knapsack
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Knapsack treatment of weeds in grassland makes sense if dock or thistle populations are less than 5% (count the number of docks or thistles in a 5m x 7m area to get the % infestation level).
Treatment of nettles, brambles and other unwanted vegetation along fence lines, encroachment from hedgerows and other access areas such as footpaths and gateways are another valued use area.
There are few selective herbicides that have authorisation for handheld equipment use.
Grazon® Pro is one such product. It is an excellent solution for docks, nettles, thistles, brambles and other woody weeds. It comes with a handy measuring device.
The dose rate is 60 ml in 10 litres of water, so a 1 litre pack of Grazon Pro provides for 16 knapsack fills of 10 litre capacity.
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Autumn weed control in grassland
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Autumn is a good time to control weeds in grassland.
- Perennial weeds such as docks, thistles and buttercups are still actively growing but are now starting to take nutrients down to their roots ready for winter and so will take herbicide down with them.
- It’s an ideal time to control seedling docks and thistles in summer / autumn reseeds. Waiting until they establish and get larger increases the cost of controlling them.
- Generally, there is plenty of grass which means there is less pressure with regard to stock withdrawal periods.
- Weeds in silage / hay paddocks will now all be at a similar size and in a good leafy condition so ideal for herbicide uptake in fields.
- Spring is a busy time, so better to complete some weed control now.
In grazing pastures, docks and thistles may need topping before spraying.
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Late season control of buttercups
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Now is an ideal time to control buttercups, even if flowers are still present. We have seen excellent results in our trials over the years.
Envy offers the opportunity for farmers to rejuvenate tired old grassland which is succumbing to creeping buttercups.
Apply Envy® at 2.0 L/ha in 200 litres of water. Envy will also give excellent control of any populations of dandelions and chickweed that may also be present.
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Chickweed control in the autumn
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Envy® contains two active ingredients that both have activity on chickweed.
With fluroxypyr and florasulam combined and applied together as the Envy formulation, you can expect high levels of control of both common and mouse-eared chickweed.
Envy also works well when temperatures are cooling and during period where there can be large diurnal fluctuations of temperatures between night and day.
Where frosts are predicted then ensure the application is made at least 14 days before cold weather sets in. If this is not feasible wait and apply the following spring.
Envy has excellent grass safety, is rain fast in 2 hours, but will kill clover.
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You can easily access previous editions of the Forage Agronomy Update in the Corteva Forage App.
On the home screen of the Corteva Forage App, click on 'Newsletter' to access the previous updates.
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Cattle, sheep, tractors and more!
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A huge thank you to everyone who came to visit Corteva and Whelehan Crop Protection's stand at the Tullamore Show on Sunday 11th August.
The Tullamore Show brings together the best cattle, sheep, and equine breeders from all over the country. An average of 60,000 visitors and 700 stands from various sectors such as agriculture, home industries, farm produce, and more were present at the event.
National Area Manager for Ireland, Liz Glynn and the Whelehan Crop Protection team had a fantastic time at the show and answered lots of questions about our latest clover-safe herbicide, ProClova® XL.
Corteva Agriscience and TP Whelehan Crop Protection sponsored the class: Super €2,500 National Holstein Heifer in Milk.
The winner for the sponsored class was, "Hallow Haniko Twizzle" owned by Hallow Herd Ltd. C/O Philip and Linda Jones, Holstein View, Gorey, Co. Wexford.
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Q: What is the latest date of use for Pastor® Trio on new sown leys?
A: The cut-off date for Pastor Trio was 31 August. This solution gives control of a wide spectrum of broad leaved weeds including seedling thistles where clover presence is not a concern.
A: It will give some control, but stock need to be kept out until it has died and become less palatable. This is likely to take some weeks so there is a better option.
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10 IASIS points will be awarded for those subscribing to the Forage Agronomy Update.
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Use plant protection products safely. Always read the label and product information before use. For further information including warning phrases and symbols refer to label. ®™ Trademarks Corteva Agriscience Limited and its affiliated companies. All other brand names are trademarks of other manufacturers for which proprietary rights may exist. All manufacturers trade names and trademarks are duly acknowledged. © 2024 Corteva. ProClova® XL contains florpyrauxifen-benzyl and amidosulfuron. Pastor® Trio contains fluroxypyr, clopyralid and florasulam. Doxstar® Pro contains fluroxypyr and triclopyr. Envy® contains fluroxypyr and florasulam. Forefront® T contains aminopyralid and triclopyr. Grazon® Pro contains clopyralid and triclopyr. Thistlex® contains clopyralid and triclopyr.
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