Valdor® Flex is a residual herbicide for pre-emergent & early post-emergence application. It controls a broad spectrum of annual and perennial broad-leaved weeds on amenity vegetation (around) natural surfaces not intended to bear vegetation, permeable surfaces overlying soil, and hard surfaces (railway ballast only). It can be applied once per year at a rate of 0.5 kg/ha.
Please note: packaging may vary.
Product Overview | |
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Product Type | Herbicide |
Product Name | Valdor® Flex |
MAPP No. | 19033 |
Active Substances | Diflufenican and Iodosulfuron-methyl-sodium |
Formulation | Water dispersible granule |
Areas of Use | Amenity vegetation (around), hard surfaces (railway ballast only), natural surfaces not intended to bear vegetation, permeable surfaces overlying soil |
Amateur/Professional | Professional |
Phytomobility | Residual |
Mode of Action Group | Inhibition of pigment synthesis and Inhibition of ALS |
Valdor® Flex should be applied pre– or post-emergence of the plant species to be controlled. The combination of the two active substances in Valdor® Flex means that any very young plants that are present at the time of spraying will be controlled as well as providing a residual effect for up to four months. This ensure a long lasting, weed free environment.
If larger weeds are present, Valdor® Flex can be applied with glyphosate or a fatty acid to achieve control of the existing vegetation.
This 500 g container comes complete with a measuring cup for ease of use and is ideal for those needing to keep larger areas weed free. The 500 g container is sufficient to treat 1 ha.
Valdor® Flex sachets are a cost effective solution to keep natural surfaces, such as open soil, gravel and industrial areas, weed free for up to 4 months. The 10 x 10 g sachets provide a convenient method of treating smaller areas. Each sachet can be mixed with 6-10 litres of water in a knapsack sprayer providing surface coverage up to 200 m2.
Valdor® Flex gives pre– and early post-emergence weed control up to the two leaf stage of annual and perennial broadleaved plants and grasses. It will not control deep rooted perennial plants such as dandelion, thistle or nettles once they are established.
A selection of the plant species that are controlled by Valdor® Flex are listed below (please read the label for the full species list):
Grasses | Annual Herbs | Perennial Herbs | Woody Plants |
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Annual meadow-grass (Poa annua) Cocksfoot (Dactylis glomerata) |
Bristly ox-tongue (Picris echioides) Dove’s foot crane-bill (Geranium molle) Common groundsel (Senecio vulgaris) Hairy bitter cress (Cardamine hirsuta) Knotgrass (Polygonum aviculare) Mayweeds (Matricaria spp.) Shepherd’s purse (Capsella bursa-pastoris) |
Black medick (Medicago lupulina) Dandelion (Taraxacum officinale) White clover (Trifolium repens) Greater plantain (Plantago major) Ribwort plantain (Plantago lanceolata) Persian speedwell (Veronica persica) Rosebay willowherb (Chamerion angustifolium) Yarrow (Achillea millefolium) |
Cinquefoil (Potentilla fruticosa) |
Where to use
For use on:
When to use
Valdor® Flex can be applied at any time of year but is most effective when applied pre- or early post-emergence of weeds (up to the 2 leaf stage).
Application Window | |||||||||||
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Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
How to use
Maximum Treatments | Pack Coverage | Application Rate | Water Volume | Application Method | Spray Quality |
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1 per annum | 1 ha | 0.5 kg/ha | 300 - 500 L/ha | Conventional knapsack sprayer | Coarse |
Maximum Treatments | Pack Coverage | Application Rate | Water Volume | Application Method | Spray Quality |
---|---|---|---|---|---|
1 per annum | 10 x 200 m2 ha | 0.5 kg/ha | 300 - 500 L/ha | Conventional knapsack sprayer
Vehicle mounted sprayer |
Coarse
Three star drift reduction |
Bio-Chemical Mode of Action: Diflufenican belongs to the inhibition of pigment synthesis group of herbicides.
Pigment inhibitors work by interfering with pigment production, leaving the chlorophyll unprotected from sunlight. As a result, the cell contents are destroyed rapidly.
Mobility: Diflufenican is a residual herbicide with xylem mobile activity which means that as susceptible plants come into contact with the active substance, it is absorbed through the leaves and roots then moves upwards through the plant within the xylem (water conducting tissues).
Application timing: Pigment inhibitors should be applied pre– or early post-emergence. If applied post-emergence, they are most effective when target plants are small.
Bio-Chemical Mode of Action: Iodosulfuron-methyl-sodium belongs to the ALS (Acetolactate Synthase) Inhibitors group of herbicides.
Acetolactate synthase is an important enzyme involved in the biosynthesis of branched-chain amino acids. ALS inhibitors interrupt this process causing the plant to initially become chlorotic before necrosis of plant tissues followed by whole plant death occurs.
Mobility: Iodosulfuron-methyl-sodium is a residual herbicide with xylem and phloem mobile activity which means that as susceptible plants come into contact with the active substance, it is absorbed through the leaves and roots then moves to areas of new growth within the xylem (water conducting tissues) or phloem (sugar conducting tissues).
Application timing: ALS inhibitors are best applied when the weeds are actively growing. They are more effective when target plants are young and in their vegetative phases.
Putting Valdor® Flex to the test on a heavily weeded gravel site at an international airport was a chance to find out if it would live up to expectations. Long-lasting residual control and ability to minimise resistance were two qualities we were looking for in the product, and we were very impressed by both aspects.
Herbicide resistance is becoming a real issue in the amenity sector, so the fact the product brings new chemistry to our armoury is key. We also found it was particularly clean and easy to work with. There was no foaming in the tank, so the job was swiftly completed.
In this trial we combined Valdor® Flex with glyphosate due to size of the weeds.
Alan Abel
Complete Weed Control South and Central Wales
For further information on Valdor® Flex, please contact a member of our technical sales team on +44 (0)1902 440250.
10 x 10 g Sachet - Valdor FLEX 12x10x10g Product Label
500 g - Bayer Valdor Flex UK Re-Design July 20 update v4.pdf