TrooperPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

Trooper is a herbicide with residual and contact activity for the control of black-grass, annual grasses and broad leaved weeds in winter wheat and winter barley.

 

Good even spray cover of the target is essential.

Trooper is slow acting and the final level of weed control may take some time to appear.

Some soil moisture is required for Trooper to be activated. Best results will be obtained if rain falls within 7 days of application.

Residual control may be reduced under prolonged dry conditions.

Trooper is not recommended for the post-emergence control of weeds on the following soil types; sandy clays, clays and silty clays (MAFF Soil Texture (85) System).

Transplanted or established weeds present after completion of seedbed preparation should be controlled by an approved contact or translocated herbicide prior to the use of Trooper.

Do not disturb the soil after application.

Do not use on soils with more than 10% organic matter.

Weed control may be reduced on soils with more than 6% organic matter.

Do not use on stoney or gravelly soils.

Do not use on water-logged soil or soils prone to water logging.

Seedbeds must have a fine, firm tilth.

Loose or cloddy seedbeds must be consolidated otherwise reduced weed control or crop damage from inadequate seed cover may occur.

For effective weed control, seedbed preparations should include the even incorporation of any trash, straw and ash to a depth of 15 cm.

Do not apply Trooper to crops suffering from stress, which may be caused for example by pests, disease, water logging, poor seedbed conditions or previous chemical treatment.

For pre-emergence treatments, seed should be covered with a minimum of 32 mm of settled soil.

Shallow-drilled crops should only be treated post-emergence.

Do not apply Trooper pre-emergence to crops drilled after 30 November.

Do not soil incorporate Trooper.

Do not spray undersown crops.

Reductions in crop vigour, which may result in yield reductions, may occur where there is very wet weather before and after application, particularly where soils become water-logged.

Avoid spraying during periods of prolonged or severe frosts.

Concentrated or diluted Trooper may stain. Avoid spillage.

Staining is minimised or completely removed if skin/clothes are washed immediately.

Rate:4l/ha

Critical Comments:S (up to 1 tiller)

 

WRAG Guidelines advise that application to small Black-grass aids in control of resistant Black-grass. However, application of ‘Trooper’ to small Black-grass will not improve control of resistant populations that can metabolise a range of herbicides, as both flufenacet and pendimethalin can be affected. The efficacy of both flufenacet and pendimethalin can be reduced by the enhanced metabolism resistance mechanism of Black-grass; this can happen even when treating black-grass at the early growth stages recommended for treatment with Trooper.

Strains of some annual grasses (eg Blackgrass, Wild-Oats, and Italian Ryegrass) have developed resistance to herbicides, which may lead to poor control. A strategy for preventing and managing such resistance should be adopted. Guidelines have been produced by the Weed Resistance Action Group and copies are available from the HGCA, CPA, your distributor, crop adviser or product manufacturer.

Populations of black-grass and Italian ryegrass with high levels of enhanced metabolism resistance will not be fully controlled.

Trooper can be used on all varieties of Winter Wheat and Winter Barley.

From pre-emergence to before third tiller stage (GS 23) of the crop and before 31 December in year of planting.

Apply Trooper at 2 or 4 l/ha in 200 litres of water/ha.

 

There are no restrictions on following crops when Trooper is used alone.

Plough to at least 15 cm before planting all following crops except for potatoes, peas, wheat and barley.

Plough to at least 15 cm. The following crops may then be sown: potatoes, peas, wheat and barley.

 

Never prepare more spray solution than is required.

Half fill the tank with clean water and start the agitation. To ensure thorough mixing of the product, invert the container several times before opening. Add the required quantity of Trooper to the spray tank while re-circulating. Fill up the tank with water and continue agitation until spraying is completed.

When tank mixes are to be used, take due note of any instructions given as to the order of mixing. Each product should be added separately to the spray tank and fully dispersed before the addition of any further product(s).

On emptying the container, rinse container thoroughly by using an integrated pressure rinsing device or manually rinsing three times. Add washings to sprayer at time of filling and dispose of container safely.

Apply as a MEDIUM spray, as defined by BCPC.

A travel speed of 6 to 8 km/h is advised for tractor-mounted and trailed sprayers. High speeds increase the risk of uneven cover due to excessive boom whip and bounce. The slower speed is recommended where the target is in a thick crop or weed cover, or where travel conditions are rough.

After spraying, thoroughly clean and flush out application machinery with a minimum of three rinses, to ensure that all traces of product are removed.