A 15ha (36 acre) weed-infested grass field on Ministry Farm, Ulnes-Walton near Leyland, Lancashire, has been transformed after one application of the broad-spectrum, translocated herbicide Forefront® T. It was sprayed by a contractor on the first May Bank Holiday last year. “When my uncle bought this field in 2014, it was heavily infested with docks and […]
Common weed problems
Common pest problems
Now is a good time to spray perennial grassland weeds such as docks and thistles with a translocated herbicide, as the plants are starting to send nutrients down to their roots ready for winter, according to Brent Gibbon, grassland agronomy manager with Dow AgroSciences. “Weed control in grass fields is traditionally done in spring in […]
Introducing the new Dow AgroSciences’ Grassland Weed App. An easy to use tool to help get a fix on cost of weeds in grassland and identify solutions for their removal. Use it to: Calculate productivity loss from grassland weeds Find out how to control over 70 different weeds of grassland Get more information on our […]
Welcome to the first Grassland Agronomy Update from Dow AgroSciences. These regular technical notes are a seasonal commentary to help those interested in improving grassland productivity on dairy, beef, sheep & equestrian enterprises. You can claim 2 CPD points for subscribing to this Update. To subscribe please send your details to DowAgroSciencesUK@dow.com, with the title […]
The best time to tackle dock infestations in silage crops is before first cut according to Andy Bailey, grassland agronomy specialist for Dow AgroSciences. “There are three good reasons for spraying docks in grass in early to mid-April,” says Mr. Bailey. “Firstly killing them now allows the grass time to spread into the gaps they […]
- Are Dow AgroSciences grassland herbicides clover safe?
- No, clover will be killed or severely checked by applications of Dow AgroSciences’ grassland herbicides. However you can stitch clover back in after six weeks of applying PastorPro, Thistlex, DoxstarPro or GrazonPro. When using Forefront T, clover can be reintroduced four months after application.
- Can any of the Grassland products; DoxstarPro, Forefront T, PastorPro, Thistlex or GrazonPro 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 DoxstarPro, Forefront T, PastorPro, Thistlex and GrazonPro to the roots, leading to poor levels of weed control.
- Can DoxstarPro, Forefront T, PastorPro, Thistlex or GrazonPro be used on new leys (<12 months old)?
- No. Grassland should be at least 12 months old for all of the above products.
- Can I apply PastorPro through a Knapsack?
- No. There is no approval for hand-held application of PastorPro. Consider using GrazonPro for hand-held applications.
- Will PastorPro control thistles?
- Yes. Apply at 4.0 L/ha.
- Can I use GrazonPro on my lawn?
- No. GrazonPro is a professional product recommended for use only as an agricultural herbicide.
- How rainfast is GrazonPro?
- If GrazonPro is applied to a dry leaf it will be rainfast in 2 hours.
- What rate of GrazonPro should be applied through a knapsack?
- 60 ml of GrazonPro in 10 litres water.
- What is the grazing interval for GrazonPro?
- Seven days. Ideally allow 28 days if cutting the field for silage or hay. The seven day exclusion period may need to be extended if poisonous weeds are present.
- Will GrazonPro control chickweed?
- No, but DoxstarPro, Forefront T and PastorPro all give excellent control when applied under the correct conditions.
- What is the best Dow grassland product for cow parsley control?
- GrazonPro offers good control of cow parsley when used at the rosette stage. It is for spot treatment only. Forefront T and PastorPro can be applied through tractor mounted hydraulic sprayers. Forefront T offers moderate control of cow parsley. Forefront T use is limited to grass grazed by cattle and sheep only. Although not as effective at Forefront T, PastorPro offers some control of cow parsley and can be used on field including those for silage and hay.
- What is the cutting interval after spraying weeds in grassland?
- After application of our products leave a minimum of 21 days, ideally 28 days before cutting to allow maximum translocation of the active ingredients down to the roots of weeds.
- What is the grazing/cutting interval after application of PastorPro?
- Seven days for grazing and ideally 28 days if grass is being cut. The seven day exclusion period may need to be extended if poisonous weeds are present.
- What is the knapsack rate for DoxstarPro, Forefront T, PastorPro and Thistlex?
- These products are not recommended for application through a knapsack. GrazonPro at 60 ml in 10 litres of water is the best product for spot treatment.
- What is the stock exclusion period for hens?
- The same as for livestock: seven days and until foliage of any poisonous weeds such as ragwort has died and become unpalatable.
- What is the stock exclusion period for horses for Doxstar Pro, GrazonPro, PastorPro and Thistlex?
- The same as for livestock: 7 days and until foliage of any poisonous weeds such as ragwort has died and become unpalatable.
- What products do Dow AgroSciences recommend to control brambles in grassland?
- Brambles should be sprayed between June and August, when plants are actively growing, but before plants begin to senesce in the autumn. It is essential that all foliage is thoroughly wetted or incomplete kill may result. The maximum concentration must not exceed 60ml of GrazonPro per 10 litres of water. Blaster Pro can be used to control brambles in amenity grass.
- What water volumes do I need to control docks in established grassland with Doxstar Pro?
- Whenever DoxstarPro is used in established grassland the rate of water should always be 300-400 L/ha.
- 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.
- Will DoxstarPro, Forefront T or PastorPro 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.
- Will Thistlex control dandelions?
- Yes, but it is not an 'on label' weed. Consider topping dandelions and then applying Thistlex 2 - 3 weeks later at the rosette stage of the weed.