Duplosan KVPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

A soluble concentrate containing 600 g/l (48% w/w) optically active isomer mecoprop-P, formulated as potassium salt.

A herbicide for the control of a wide range of broadleaved weeds in winter and spring cereals, grass seed crops, amenity grassland and managed amenity turf.

 

Controls many important weeds in cereals including Cleavers and Chickweed in a range of cereal crops.

Works in cooler conditions.

Flexible tank mix product.

Control of Volunteer oilseed rape.

Amenity grassland and managed amenity turf recommendation.

Lerap category: Unclassified

Pack size: 10 litres

Storage: PROTECT FROM FROST

 

Other specific restrictions:

Treated grass seed crops must not be grazed or cut for fodder.

Applications to cereals must not be made between 1 October and 1 March.

The total amount of mecoprop-P applied to an individual crop, or in a single year in the case of a perennial crop, must not exceed the maximum total dose of mecoprop-P approved for application to that crop by any single mecoprop-P containing product.

 

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

DUPLOSAN KV is a hormone herbicide which is absorbed by both shoots and roots and rapidly translocated within herbaceous plants.

When herbicides with the same mode of action are used repeatedly over several years in the same field, selection of resistant biotypes can take place. These can propogate and may become dominating. A weed species is considered to be resistant to a herbicide if it survives a correctly applied treatment at the recommended dose. A strategy for preventing and managing such resistance should be adopted. This should include integrating herbicides with a programme of cultural control measures. Guidelines have been produced by the Weed Resistance Action Group and copies are available from the HGCA, CPA, your distributor, crop advisor or product manufacturer.

 

Spring cereals and grass seed crops may only be treated once per crop.

DO NOT apply DUPLOSAN KV to any crop suffering from herbicide damage or physical stress.

DO NOT apply DUPLOSAN KV during cold weather, periods of drought, if rain or frost are expected, nor if the crop is wet. If sharp or severe frosts occur within three to four weeks of application to barley under stress or of low vigour on light soils, scorch or stunting may occur and yields may be less than optimum.

The crop should not be rolled or harrowed within a period of seven days before or after spraying with DUPLOSAN KV.

Avoid drift onto all broadleaved plants outside the target area.

WASH EQUIPMENT thoroughly immediately after use. Rinse with water three times, drain and allow to dry. Traces of herbicide left in the sprayer may damage susceptible crops if these are subsequently sprayed using the same equipment.

 

The best weed control will be achieved if crops are sprayed in conditions when weeds are actively growing, provided the crop is within the correct growth stages.

Identify the weeds present and select the appropriate rate as listed below. Optimum conditions prevail when all the following are true:

1. Soils are warm and moist.

2. Weeds have not been frost-hardened.

3. Warm, moist conditions are expected to persist for several days after application.

This is particularly important when DUPLOSAN KV is used in the spring to control large autumn germinated cleavers, which may have become winter hardened.

Provided weeds are cotyledon to two leaves and application conditions meet the requirements listed above, susceptible species will be controlled at the rates recommended below.

If weeds are three to six leaves or conditions are less than optimum, using a higher rate will still control susceptible species. For optimum suppression of perennial weeds and species classed as moderately susceptible, apply DUPLOSAN KV at 2.3 l/ha

 

2.3 l/ha.

DUPLOSAN KV may be applied from the leaf sheath erect stage up to before third node detectable stage in the spring.

If sharp or severe frosts occur within three to four weeks of application to barley under stress or of low vigour on light soils, scorch or stunting may occur and yields may be less than optimum.

 

 

1.5 to 2.3 l/ha dependant on the target weed species. The 2.3 l/ha rate may only be used once the crop has reached leaf sheath erect stage.

One application of DUPLOSAN KV can be made from the first fully expanded leaf stage until before the first node is detectable (GS 31).

 

2.4 l/ha.

The sward should not be topped for at least a week before or after spraying. A maximum of two applications per year are permitted.

 

Allow to flower in July and then cut the flower stalks before seeding to weaken root reserves. Wait two weeks and then apply the recommended rate of DUPLOSAN KV. Docks will be severely checked but may recover, in which case the treatment should be repeated in the following season.

 

Treat when actively growing and not shielded by grass, usually late summer or autumn.

If appreciable foliage is present there will be top growth suppression of weeds listed as top growth suppressed in the weed susceptibility table.

When using a conventional sprayer apply in 185–330 litres of water per hectare. When applying through a knapsack sprayer use a minimum of 480 litres of water per hectare.

 

1.5 to 2.5 l/ha.

One application can be made once grasses have at least three fully expanded leaves and have begun to tiller, but at least five weeks before the emergence of the seed head in grass seed crops. Treat Common chickweed when growing actively and not shielded by grass, usually late summer or autumn. Any clover present will be severely damaged.

Apply in 185–330 litres of water per hectare

 

When using a conventional hydraulic sprayer apply 1.5 to 2.4 litres DUPLOSAN KV in 185–400 litres of water per hectare. Use the higher volume on larger weeds or where weeds or crop are dense. When applying through a knapsack sprayer use a minimum of 480 litres of water per hectare.

Two applications of DUPLOSAN KV can be made to managed amenity turf. For spring and summer sown turf, apply approximately two months after sowing. Turf sown or laid later in the year should not be treated until the following spring. For established turf, apply DUPLOSAN KV during the growing season which is normally April to September.

CAUTION: Do not apply to newly laid turf until it is well established and actively growing. Do not apply to turf under stress, particularly in periods of drought.

 

Apply as a MEDIUM spray as defined by BCPC.

The spray volume for DUPLOSAN KV alone or in mixtures is 185–330 litres of water per hectare. The lowest volume should only be used in open crops where weeds are small and where recommendations for any tank mix partner allow. As weeds become larger and/or crop cover increases, then the water volume should be increased.

This is particularly important with cleavers. Once cleavers are beyond the two whorl stage up to six whorls, a water volume of 330 litres per hectare is required to ensure good coverage and control.

 

Half fill the spray tank with clean water and start the agitation. Pour in the required amount of DUPLOSAN KV. Add the remainder of the water and continue agitation until spraying is completed.

When tank mixes are to be used, each product should be added separately to the spray tank, taking due note of any instructions given as to the order of mixing.

 

For an up to date list of compatibilities contact your agronomist or Nufarm.