Butisan S

A suspension concentrate containing 500 g/l (43.1% w/w) metazachlor.

A herbicide for use in winter and spring oilseed rape, brussels sprout, ornamental trees and ornamental shrubs.

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.

Butisan S is a residual herbicide which can be used in all varieties of winter and spring sown oilseed rape and brussels sprouts. It may also be used in some ornamentals and hardy nursery stock. Butisan S is suitable for use on all soil types as defined in the Soil Texture (85) System, except sands and very light soils and soils containing more than 10% organic matter.

Restrictions/Warnings

With drilled crops, when applying Butisan S pre emergence, it is important for crop safety to ensure physical separation of the herbicide from the seed. Ensure that the seed is well covered with soil, to a depth of 15 mm. With direct drilled crops, harrow across slits to cover the seed before spraying Butisan S. Ensure that transplants are correctly planted with the roots well covered. Loose and puffy seedbeds must be consolidated before treatment.

Do not apply to broadcast crops of oilseed rape until the crop has attained the two fully expanded cotyledon growth stage.

Do not use when heavy rain is forecast.

On medium and heavy soils where seedbeds are moist, firm and free from clods, pre-emergence Butisan S should be applied from drilling up until the crop seed chits. In warm soils, this may occur within 48 hours of drilling.

Avoid applying Butisan S to soils with a compaction layer or which are poorly drained, as crop damage can occur under waterlogged conditions

Care should be taken to avoid overlap of spray swaths.

Do not treat crops which are suffering from wilting, pests or diseases or badly planted transplants.

When used alone Butisan S has very little dewaxing activity. However, under frosty conditions a transient scorch may sometimes occur. Do not use Butisan S in tank mixtures under frosty conditions.

A reduction in crop vigour, weed control and possibly plant stand may occur with excessive rainfall shortly after application. If heavy irrigation is planned after transplanting, apply Butisan S after irrigating. Where a crop check has occurred this usually grows out after a few weeks and yields are normally unaffected.

On brashy and stony soils, Butisan S may cause some reduction in crop vigour and/or plant stand, due to the chemical moving down to the rooting zone too rapidly.

Herbicidal activity is dependent upon root uptake. If Butisan S is applied onto a dry soil surface it will only be effective after rainfall has occurred. Light (10 mm at any one time) irrigation will help to ensure herbicidal activity. Weed control is dependent on adequate moisture.

Useful weed control can be obtained on soils with an organic matter higher than 10% but it may decrease as the percentage of organic matter increases appreciably.

In ornamental trees and ornamental shrubs not all species or cultivars have been tested and so only a small number of plants should be treated initially to gain experience with the treatment. Selectivity is greatest when applied under cool, overcast conditions. Applications should not be made to soft, vigorously growing foliage, particularly during or after a period of warm days and cold nights.

Extreme care should be taken to avoid damage by drift onto plants outside the target area.

To reduce the risk of movement of Butisan S to water:

a. On clay soils, create a fine, consolidated seedbed to slow the downward movement of water.

b. Do not apply Butisan S to dry soil. Moist soils have fewer and smaller cracks.

c. Do not apply Butisan S if heavy rain is forecast, wait until after the event.

Crops

Butisan S can be used in all varieties of winter and spring sown oilseed rape and brussels sprouts. It may also be used in some ornamentals and hardy nursery stock

OILSEED RAPE

Time of Application

Butisan S may be applied pre- or post emergence of the crop, depending on soil type, the seedbed conditions and weed spectrum, see Section 3. Use before 9 true leaf stage (GS19).

Approved herbicides may follow a pre or early post emergence application of Butisan S, provided that the crop is undamaged and showing no adverse symptoms.

Pre emergence use:

On medium and heavy soils where seedbeds are moist, firm and free from clods, Butisan S should be applied from drilling up until the crop seed chits. In warm soils, this may occur within 48 hours of drilling.

Do not apply to broadcast crops until the crop has attained the two fully expanded cotyledon growth stage.

Early post emergence use:

Butisan S can be used on light, medium or heavy soils post emergence, once the majority of the crop has reached the fully expanded cotyledon stage. See Section 3 for weed susceptibility and note moisture requirement.

Post emergence application of Butisan S is recommended if:

– seedbed conditions are not ideal for the pre emergence use.

– the seed is not covered with 15 mm of soil (as with broadcast crops).

– Butisan S could not be applied before the seed crop chits.

– light soils, or all recommended soils which are stony, brashy or gravelly are to be treated, particularly if heavy rainfall has been forecast for the period following drilling.

– late drilled crops are to be treated.

Rate of application

Oilseed rape - apply at 1.5 litres Butisan S per hectare, pre or post emergence of the crop.

See Section 3 for weed susceptibility and note moisture requirement.

Summary for oilseed rape:

Pre emergence Post emergence

Broadcast crops Do not use Use permitted

Crop growth stage After drilling and prior to chitting of crops (Generally within 48 hours) After cotyledons fully expanded (1st true leaf partly emerged)

Weed growth stage Pre emergence -

Soil type Medium to heavy Light to heavy

Seed bed Fine, firm, moist. Not dry or cloddy. Not critical provided reasonable

Drilling depth 15 mm Not critical provided crop is well rooted and not stressed

Important notes DO NOT USE on broadcast or late drilled crops, or stony soils Adequate moisture is necessary for weed control

TRANSPLANTED BRUSSEL SPROUT

Time of Application

The latest time of application of Butisan S is 6 weeks before harvest in transplanted brussel sprout.

When treating transplants, ensure that the roots are well covered with soil and that the plants are adequately hardened off and established prior to treatment. If necessary, use irrigation to help establish the plants and raise soil moisture before treatment with Butisan S. Avoid spraying transplants when very warm days and cool nights are expected.

Modular or block raised transplants can be particularly sensitive to herbicide damage because they are often both soft and immature. It is essential that the directions concerning transplants are followed in full and it is advisable to only treat a small area in the first instance.

Rate of application

Apply at 1.5 litres per hectare Butisan S. See Section 3 for weed susceptibility and note moisture requirement.

DIRECT DRILLED BRUSSEL SPROUT

Time of Application

Apply Butisan S after the crops have 3 4 true leaves but before weed emergence. Do not treat crops within 6 weeks of harvesting.

To prolong weed control in direct drilled brussel sprout one application of Butisan S can be made post emergence of the crop following the use of an alternative pre emergence treatment. See Section 3 for weed susceptibility and note moisture requirement.

Rate of application

Apply at 1.5 litres per hectare Butisan S. See Section 3 for weed susceptibility and note moisture requirement.

DO NOT treat crops under hot, sunny conditions. If Butisan S is applied onto a dry soil surface it will only be effective after rainfall has occurred. Light (10 mm at any one time) irrigation will help to ensure herbicidal activity.

ORNAMENTAL TREES AND ORNAMENTAL SHRUBS

DO NOT treat crops growing under glass or polythene, in containers or any plants suffering from adverse conditions, either environmental or from previous treatments. (See also Restrictions/Warnings.)

Time of Application

Apply as a surface spray to beds which are moist, firm and free from clods once existing weeds have been removed and before new weeds have emerged (see section 3). New plantings can be treated after lining out or transplanting once the plants are established and sufficiently hardened off to withstand treatment. This may require irrigation before application which will also ensure adequate soil moisture. When used in sequence with other herbicides, apply when the previous treatment begins to fail. This is indicated by the first signs of weed germination. This criterion can also be used to time subsequent applications following the use of Butisan S.

Rate of application

Apply 1.5 litres per hectare Butisan S. See Section 3 for weed susceptibility and note moisture requirement. When using a knapsack sprayer for directed applications around the base of stems.

Weed Control

Butisan S is taken up via cotyledons and roots and takes maximum affect before, or shortly after, weed emergence. Optimum results are obtained from applications made to fine, firm and moist seedbeds.

Resistance

Strains of some annual grasses (e.g. black-grass, wild-oats, and Italian rye grass) have developed resistance to herbicides which may lead to poor control. A strategy for preventing and managing such resistance should be adopted. Guidelines have been produced by the Weed Resistance Action Group and copies are available from the HGCA, CPA, your distributor, crop adviser or product manufacturer.

Repeated use of herbicides with the same mode of action can increase the risk of strains of weeds developing resistance to these compounds, leading to poor control. In order to minimise the risk, a strategy for preventing and managing such resistance should be adopted. Use products with different modes of action and from different chemical groups in sequence or tank-mix, in conjunction with effective cropping rotation and cultivation techniques. In all cases the recommended rate of use should be adhered to. Follow WRAG guidelines

Key elements of the resistance management strategy for Butisan S:

Always follow WRAG guidelines for preventing and managing herbicide resistant weeds.

Maximise the use of cultural control measures wherever possible (e.g. crop rotation, ploughing, stale seedbeds, delayed drilling, etc).

Use tank mixes or sequences of effective herbicides with different modes of action within individual crops, or successive crops.

For the control of herbicide resistant grass weeds, always use Butisan S in sequence with other effective graminicides with different modes of action.

Monitor fields regularly and investigate the reasons for any poor control.

Mixing and Application

Mixing

Never prepare more spray solution than is required.

SHAKE WELL BEFORE USE. Fill the spray tank three quarters full with water and start the agitation. To ensure thorough mixing of the product, invert the container several times before opening. Add the required quantity of Butisan S to the spray tank while re-circulating. Fill the tank with the remaining required amount of water and continue agitation until spraying is completed.

On emptying the product container, rinse container thoroughly by using an integrated pressure rinsing device or manually rinsing three times. Add washings to sprayer at time of filling and dispose of container safely.

When using a knapsack sprayer fill the sprayer with three quarters of the total water required. Add the required quantity of Butisan S to the sprayer, ensuring adequate dispersal of the product, then fill the tank with the remaining water.

Application

To ensure optimum spray coverage and minimize spray drift, adjust the spray boom to the appropriate height above the crop, according to guidance provided by the sprayer and/or nozzle manufacture.

Apply Butisan S as a MEDIUM spray as defined by BCPC.

Guidance on water volumes:

WINTER OILSEED RAPE

Recommended water volume: 100 litres

Situation & Comments: Pre emergence - not be used on poor seed beds or in tank mixture with other products at this water volume. When using this reduced water volume nozzles designed to produce a coarser spray may be used.

Recommended water volume: 190 litres

Situation & Comments: Pre emergence in tank mixtures or Post emergence

SPRING OILSEED RAPE TRANSPLANTED & DIRECT BRUSSEL SPROUT ORNAMENTAL TREES ORNAMENTAL SHRUB

Recommended water volume: 190 - 450 litres

Situation & Comments: Use the higher water volume where seedbeds are not ideal (e.g. slightly cloddy).

Sprayer cleaning

Wash sprayer thoroughly immediately after use, using clean water and following the sprayer cleaning guidance provided by the equipment manufacturer.

Following Crops

For all situations following or rotational crops must not be planted until six months after application of ‘Butisan S

’Following a normally harvested winter oilseed rape

Any crop can follow normally harvested winter oilseed rape treated with Butisan S and ploughing is not essential before sowing the following cereal crop.

Redrilling the following spring

In the event of a crop failing in the autumn or winter, then several crops can be drilled after the use of Butisan S alone as follows:

After ploughing, the following crops can be sown:

Cereals (excluding Durum wheat) ;Field beans;Peas; Transplanted brassicae; Direct drilled brassicae; Potatoes; Maize ;Linseed.

Following spring applications

Following or rotational crops must not be planted until six months after application of ‘Butisan S’. Plough to a depth of at least 150 mm before sowing or planting any succeeding crop. Where crops follow use in ornamental trees and ornamental shrubs, follow the instructions given above for Butisan S alone.

Compatibility

For details of compatibilities contact your distributor, local BASF representative or BASF Technical Services Hotline: 0044 845 602 2553

Registered for cultures	Rate	BBCH	Preharvest Interval
Winter rape	1.5 l	19
Spring rape	1.5 l	19
Brussels sprouts	1.5 l	19	42

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