ToprexPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

FORMULATION & ACTIVE INGREDIENT: A suspension concentrate containing 125 g/l (11.3% w/w) paclobutrazol and 250 g/l (22.5% w/w) difenoconazole.

TARGETS:A plant growth regulator and fungicide with contact and systemic activity against Phoma leaf spot and Light leaf spot (Pyrenopeziza brassicae) in winter oilseed rape.

 

IMPORTANT: This information is approved as part of the Product Label. All instructions within this section must be carefully read in order to obtain safe and successful use of this product. A suspension concentrate containing 125 g/l paclobutrazol and 250 g/l difenoconazole. TOPREX contains a plant growth regulator (paclobutrazol) for crop height reduction and lodging control and fungicide (difenoconazole) with contact and systemic activity against Phoma leaf spot and Light leaf spot (Pyrenopeziza brassicae) in winter oilseed rape. TOPREX must only be used when both disease control and plant growth regulation are required simultaneously. If disease control and growth regulation are not required at the same time, appropriate fungicide products or growth regulator products should be used separately instead. Please consult seed contract customer, before using TOPREX on crops to be grown for seed.

 

TOPREX controls moderate infections of Phoma leaf spot and Light leaf spot (Pyrenopeziza brassicae) in winter oilseed rape. Inspect crops to assess disease development prior to spraying. Apply when disease thresholds have been breached according to appropriate disease support systems.

 

Apply to actively growing crops. Stem canker present as a result of autumn infection will not be controlled.

Apply in early spring from the onset of stem extension, depending on disease pressure

TIMING
Disease control considerations
Apply in spring to actively growing crops with a large canopy where disease thresholds are reached and monitoring systems indicate a risk of disease development. In high disease risk situations the use of additional difenoconazole fungicide (i.e. tank mixture with PLOVER 0.15 l/ha) may be required to enhance disease control.
Plant growth regulation considerations
Apply in spring from early stem extension to green bud to shorten the crop, reduce lodging and protect yield.
In spring, plant growth regulation is not appropriate in backward crops where the crop GAI (Green Area Index) is under 1.0 in March or 2.0 in April (see HGCA Topic Sheet No. 82; Managing forward crops of oilseed rape).
Avoid use of TOPREX in cold conditions, when the crop is not growing, as plant growth regulation may be reduced.
Avoid spray drift to adjacent crops and other non-target plants.

 

MIXING AND SPRAYING
Mixing
Make sure the sprayer is set to give an even application at the correct volume.
Fill the spray tank with half the required volume of clean water and start agitation. Add the required amount of TOPREX and continue agitation while adding the rest of the water.
If using PLOVER to supplement TOPREX, each product should be added separately to the bulk of the water in the spray tank, and thoroughly mixed before adding the partner product. Maintain constant agitation of the mixture until spraying is completed.
Immediately after use, clean the spray equipment thoroughly. Drain the system completely and rinse spray tank, boom and nozzles two to three times with clean water until the foam and all traces of the formulation have been removed.

 

Spray Volume
Apply TOPREX to winter oilseed rape in 200 litres water per hectare.

Spraying
Apply as a MEDIUM quality spray as defined by BCPC. A spray pressure of 2-3 bars is preferred.

 

In normal rotations, only cereals may be sown after ‘TOPREX’ treated winter oilseed rape. In the case of cropfailure following ‘TOPREX’ treatment, cereals may be used as the replacement crop, as long as 1 month has elapsed since the last ‘TOPREX’ application. Broad-leaved crops (including winter oilseed rape) should not be sown for at least 16 months* after the last ‘TOPREX’ treatment.’ * Solanaceous crops (potatoes and tomatoes) should not be sown within 3 years of the last ‘TOPREX’ treatment.

 

TOPREX may be used in a 2-way mixture with PLOVER (UK only).