Optica Selective Herbicide 10 L

SKU: 18164
Sale price£103.20 ex. VAT
£123.84 inc. VAT
(minimum of 1)


Optica 10 L

Mapp No. 14373

Active Ingredients: Soluble concentrate containing 600 g/l (48% w/w) optically active isomer mecoprop-P, formulated as potassium salt

What is Optica?

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

What does Optica do?

Optica controls a wide range of broad-leaved weeds in amenity grassland and managed amenity turf.

Application Information

Managed Amenity Turf 2.4 L/ha 2 per year

Amenity Grassland

Timing of Application: 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 Optica. Docks will be severely checked but may recover, in which case the treatment should be repeated in the following season.

Common Chickweed

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. 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 L water/ha.

Managed Amenity Turf

Rate of application: When using a conventional hydraulic sprayer apply 1.5 to 2.4 litres Optica in 185 to 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 L water/ha.

Time of application: Two applications of Optica can be made to managed amenity turf. For spring and summer sown turf, apply approximately 2 months after sowing. Turf sown or laid later in the year should not be treated until the following spring. For established turf, apply Optica during the growing season which is normally April to September.

Weeds Controlled

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, see below. 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 Optica is used in the spring to control large autumn germinated cleavers, which may have become 'winter hardened'. Provided weeds are at cotyledon to 2 leaves and application conditions meet the requirements listed above, susceptible species will be controlled at the rates recommended below.

If weeds are 3 to 6 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 Optica at 2.0 litres/ha.

Weeds Susceptibility Table

In amenity grassland and manged amenity turf a rate of 2.4 L/ha may be used. More than one application at the 2.0 L/ha rate may be needed for these difficult weeds. Allow 4 to 6 weeks between treatments.

Annual Broad-Leaved Weeds

Very Susceptible - 1.5 L/ha Under Favourable Conditions - Up to 100 mm Across/High
Common Chickweed Fat Hen Field Penny Cross
Susceptible - 2.0 L/ha Up to 100 mm Across/High
Black Mustard Common Chickweed1 Small Nettle
Charlock Greater Plantain3 Treacle Mustard
Cleavers Ribwort Plantain3 White Mustard
Common Vetch Shepherd's Purse Wild Raddish
Procumbent Pearlwort4
Moderately Susceptible - 2.0 L/ha Up to 100 mm Across/High
Corn Buttercup Common Mouse-Ear White Campion
Common Orache Dove's-foot Crane's-bill Common Poppy
Common Fumitory Scentless Mayweed Trifolium spp34
Moderately Resistant - 2.0 L/ha Up to 2 Expanded True Leaves
Black Nightshade Groundsel Redshank
Black Bindweed Common Hemp-Nettle Scarlet Pimpernel
Knotgrass Smooth Sow-Thistle3 Corn Spurry
Pale Pericaria Speedwells Field Scabious

Perennial Broad-Leaved Weeds

Broad-Leaved Dock2 Creeping Buttercup3 Curled Dock2
Common Nettle Creeping Thistle Daisy3

1 For the control of chickweed in grassland

2 Dock species controlled at seedling stage only

2 Control of these weeds is improved by tank-mixing at a maximum rate of 3.3 L/ha of Depitox

4 Only in turf. Stated weed growth stages in this situation are not applicable.

If you require any further information about Optica Selective Herbicide, please contact a member of our technical sales team on 01902 440280.

Technical Information

Delivery and Returns

Delivery charge (if applicable) applied at checkout. Next working day delivery is available on some products, as an option on orders placed before 1pm - excludes festive season & bank holidays. Please note deliveries to Highlands, Cornwall and more remote areas may take longer. Surcharges apply for non mainland locations, call for more information - More delivery information.

For large orders, please be aware that if you require a smaller 7.5 tonne lorry, the maximum weight for pallets is 750 kg - otherwise the standard pallet size limit of 1000 kg applies.

If you have any access restrictions for lorries or large vehicles please speak to our sales team on +44 (0)1902 440250.

Collection from our Telford, Shropshire, Trade Counter is available for this product - More collections information.

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