DevrinolPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

A suspension concentrate (SC) formulation containing 450 g/litre of napropamide (41.4% w/w) for the control of annual grass and broad-leaved weeds in; outdoor strawberries, blackcurrants, gooseberries, raspberries, certain brassicas (broccoli, Brussels sprouts, cabbage, calabrese, cauliflower and kale), swedes, turnips, field and container-grown trees and shrubs, forest nursery and winter oilseed rape

DIRECTIONS FOR USE
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.

RESTRICTIONS/WARNINGS
1. ALL CROPS
Weed control may be reduced where the spray is mixed too deeply into the soil.
Do not treat crops adversely affected by poor soil, adverse weather or cultural conditions.
AVOID SPRAY OVERLAP, PARTICULARLY ON HEADLANDS.
ncorporation under wet conditions is not satisfactory.
Surface manure, straw, moss or other organic detritus may reduce weed control. Soil cultivations after spraying should be avoided.
DEVRINOL can be used on a wide range of soils but should not be applied to Sands (as defined by the ADAS ‘85 System) or to soils with more than 10% organic matter.

2. MAIDEN STRAWBERRY CROPS
Runners should be planted carefully so that no roots are left exposed.
Soil should be firmed around the roots before application.
Do NOT treat runners of poor vigour or with shallow roots.
Do NOT apply DEVRINOL to runner beds.
DEVRINOL has been used successfully on a wide-range of strawberry varieties. However, owing to the introduction of a plethora of new varieties and changes in the methods of crop husbandry, only a small area of new varieties should be treated in their first season.

3. ALL FRUIT CROPS
DEVRINOL must not be used on protected crops.
PROCESSED CROPS: Tests have proved that DEVRINOL does not taint strawberries, blackcurrants, or gooseberries; nevertheless, growers should consult the processor before use.
RASPBERRY, BLACKCURRANT and GOOSEBERRY crops should be established for at least 10 months before treatment.
Soft fruit grown in Very Light Soils (as defined by the ADAS ‘85 System) should not be treated.

TREATMENT OF CROPS
1. FRUIT CROPS
Crop Established strawberry crops
Rate of Use Apply DEVRINOL at 7 litres/ha.
Timing Apply during November to the end of February after existing weeds have been removed.

Crop Maiden strawberry crop
Rate of Use On light soils, apply DEVRINOL at 5 litres/ha. On medium and heavy soils, apply DEVRINOL at 7 litres/ha.
Timing Apply during November to the end of February after planting but before weeds emerge. Any existing weeds should be removed before application.

Crop Blackcurrants† Gooseberries† Raspberries†
Rate of Use Apply DEVRINOL at 7 litres/ha.
Timing Apply during November to the end of February after existing weeds have been removed.

2. BRASSICAS
DEVRINOL may be sprayed prior to transplanting broccoli, Brussels sprouts, cabbage, calabrese, cauliflower or kale. DEVRINOL may also be applied in a tank mixture.
DEVRINOL is not recommended for use in plant raising beds.
Apply DEVRINOL at 1.9 litres/ha in 200-500 litres water/ha.
To maximise efficacy, a tank mixture of DEVRINOL and an approved formulation should be incorporated to a depth of 50mm (2”) prior to transplanting. Incorporation MUST OCCUR within 30 minutes of application.
Spring Planted Brassicas: Spring tine harrows (triple-K type), tandem disc harrows, power driven reciprocating harrows, the Lely Rottera and rotary cultivator with L-shaped blades are all suitable for incorporation. Make one pass with a rotary cultivator, but two passes, with the second at an angle to the first, are recommended for any other type of harrow. When non-powered harrows are used, a high forward speed of at least 8kph (5mph) is required to obtain thorough incorporation. A slow forward speed of 5kph (3mph) is recommended for the Lely Rottera and for rotary cultivators in combination with a high rotor speed.
Summer Planted Brassicas, i.e. those usually planted during July and August, e.g. winter broccoli: Application should be made during the later stages of seedbed preparation and using a light set of harrows to blend the spray into the top 25mm (1”) of soil. With this implement a high forward speed of at least 8kph (5mph) is required and two passes are recommended to obtain thorough mixing, the second pass being at an angle to the first.

Sequential Programme:
Devrinol should be sprayed and incorporated into the soil prior to drilling or transplanting a brassica crop. Incorporation MUST OCCUR on the SAME DAY as application.
May be applied after drilling or transplanting according to the manufacturers recommended rate.

3. SWEDES & TURNIPS
DEVRINOL may be sprayed prior to drilling swedes & turnips, but should only be used in a tank mixture.
Apply DEVRINOL at 1.25 litres in 200-550 litres water/ha. Use the manufacturers recommended rate.
The tank mix should be applied and incorporated according to the manufacturer’s recommendations.

4. WINTER OILSEED RAPE
DEVRINOL should only be used in a tank mix.
The mixture should be sprayed and incorporated into the soil before drilling the crop. Incorporation MUST OCCUR within 30 minutes of application.
Apply DEVRINOL at 2.1 litres in 200-550 litres water/ha, use the manufacturers recommended rate of the tank mix partner. Use a medium-coarse spray.
Where volunteer cereals are a problem, a post-emergence spray may be made according to the manufacturer’s recommendations.
Conventional seedbed preparation: Apply the tank mix during the later stages of seedbed preparation. Use only a light set of harrows to incorporate the herbicides in the top 25mm (1”) of soil. With this implement a high forward speed of at least 8km/h (5mph) is required and two passes are recommended, with the second at an angle to the first. Drilling may be carried out immediately or within 14 days of application. Alternatively, a drill fitted with light harrows will provide a second pass during drilling. In this case the direction of sowing should be at an angle to the first pass and should be completed within 48 hours of application.
Minimum cultivation: The tank mixture may be sprayed directly onto the stubble and incorporated into the top 25mm (1”) of soil as part of the surface cultivations. Tandem discs, spring tine harrows or similar non-powered harrows are suitable implements. Where surface cultivations have been completed before application, use only light tine harrows to incorporate the herbicides.

APPLICATION EQUIPMENT
Conventional tractor mounted boom sprayer to a downward placed air assisted sprayer.
Knapsack sprayer.

SUCCEEDING CROPS
The soil should be mouldboard ploughed to a depth of at least 20cm (8”) before drilling or planting any succeeding crop. Where spray overdosing has occurred, emergences and growth of succeeding crops may be reduced.
DEVRINOL has moderate residual soil activity and may cause retardation and yield loss of the succeeding crop, particularly where spray overdosing has occurred.  DO NOT use DEVRINOL in the same season if re-planting or drilling is planned.
No crop can be drilled within 7 months following application of DEVRINOL.
Only brassica crops (leaf, flower, root and fodder) and oilseed rape may be drilled, providing a period of 7 months has elapsed since the application.
Potatoes, maize, peas or dwarf beans may be grown providing a period of 9 months has elapsed since DEVRINOL was applied.
Autumn sown wheat and grass may be planted or drilled, providing a period of 12 months has elapsed since DEVRINOL was applied.
Any other crop may be planted provided a period of 24 months has elapsed since the application of DEVRINOL

MIXING
Half fill the tank with water and begin agitation. Add the required quantity of DEVRINOL to the sprayer using a filling device (e.g. induction bowl, probe etc) or otherwise by direct addition to the spray tank. Wash out container thoroughly, adding washings to the sprayer, preferably use an integrated pressure-rinsing device where available, otherwise manually rinse at least three times.
For all tank mixes, follow the procedure above except add DEVRINOL to the tank first.
Continue agitation during spraying.
Wash out sprayer thoroughly after use.

COMPATABILITY
To control weeds not fully susceptible to DEVRINOL, in established fruit crops, trees and shrubs, a tank-mixture or a sequential programme of DEVRINOL at the recommended rate with an approved formulation is recommended.
Alternatively, in established strawberry crops, DEVRINOL may be followed by an approved formulation of phenmedipham.
Follow the manufacturer’s recommendations for the application of phenmedipham.
Please refer to the UPL Europe Ltd website for further information at www.upleurope.com.