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Description
optica herbicide Optica Selective Herbicide 10 LOptica 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
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.
Docks
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:
- Soils are warm and moist.
- Weeds have not been frost-hardened.
- 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 managed 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.
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