ChlobberRegistered until: December 31, 2021
AgChemAccess - Insecticide
13723
An emulsifiable concentrate containing 480g/l (44.6%w/w) chlorpyrifos.
CHLOBBER is a contact and ingested organophosphorus insecticide for control of many pests in a wide range of crops.
 
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.
 
SAFETY TO BEES.
CHLOBBER is toxic to bees and it should not be used when crops are in flower or in the presence of flowering weeds. When using in top fruit it can be applied up to the pre-blossom pink/white bud stage or after petal fall only.
 
MIXING INSTRUCTIONS
Add the required amount of CLOBBER to half the required volume of water, add the remaining water and maintain agitation until spraying is
CHLOBBER may be mixed with paraquat for application to grassland. Fill the sprayer with clean water to nine tenths full and start the agitation.
Add the required dose of CHLOBBER and mix well. Then add the required dose of paraquat and complete the filling of the tank. Spray this mixture immediately. DO NOT leave this mixture to stand in the tank for extended periods such as during meal breaks or over-night.
All applications must be via tractor-mounted conventional hydraulic sprayers and note that paraquat should never be mixed with more than one other product.
 
COMPATIBILIY
For advice on CHLOBBER compatibility with other products besides paraquat, contact AgchemAccess.
 
RESISTANCE
Some insect pests such as aphids, pear suckers and spider mites have developed resistance to insecticides such as chlorpyrifos and where these strains of insect occur, CHLOBBER is unlikely to give satisfactory control. Repeat applications will be equally ineffective and it will be necessary to use other insecticides with different active ingredients employing a different mode of action. Total reliance on one pesticide is likely to hasten the development of resistance and pesticides of different types or alternative control measures should be included in the planned programme. Alternating insecticides with different modes of action is a recognised anti-resistance strategy and CHLOBBER should always be used in conjunction with other insecticides of a different mode of action.
 
CROP SPECIFIC INFORMATION
1. WHEAT, BARLEY AND OATS.
CHLOBBER can be applied at 1.0 L/ha to control wheat blossom midge and at 1.5 L/ha to control frit fly, leather jackets, wheat bulb fly and opomyza. Two applications of CHLOBBER at 1.5 L/ha are permitted before the flag leaf sheath extends (Zadoks 39) and a further single application of 1.0 L/ha may be applied before the crop flowers (Zadoks 59).
 
WATER VOLUME
When applying CHLOBBER as an overall spray to cereals, it should be applied in an application volume of 200 – 1000 litres/ha.
 
1.1 Wheat blossom midge: Chlorpyrifos is a broad-spectrum insecticide and only fields where thresholds of wheat blossom midge have been reached should be treated. Field inspections on still evenings or pheromone traps can help to identify these fields. Applications should be made when the crop is at a susceptible stage – between ear emergence and the start of flowering (Zadoks 51 – 59) to control the developing larvae.
Treatment should be made when the majority of ears have emerged but note that those ears which have yet to emerge will not be protected.
Applications after the start of flowering are unnecessary since the crop is no longer at a susceptible stage.
 
1.2 Frit fly: Frit fly often attacks winter wheat sown after a grass and late-sown oats are also vulnerable. The larvae burrow into the young plant and damage the emerging shoots. Visual symptoms of attack are centre leaves turning yellow prior to plant death or weak growth. To control frit fly, application should be made from post drilling, at emergence or early post-emergence at the first sigh of attack but the later applications are the least effective method of control. Alternatively CHLOBBER can be applied to the preceding grass crop before it is ploughed or desiccated or to a grassy stubble which precedes a winter wheat crop. If the grass is dense, matted and of a susceptible species to frit fly damage such as ryegrass then application to the following winter wheat will be more effective. Spring oats are best treated at the first sign of attack but application should be made before the 2 leaf stage of the crop with later applications becoming less effective.
 
1.3 Leatherjackets: Leatherjackets are also a common problem after a grass crop and treatment of this pest is most effective at the first sign of damage when plants are eaten below ground level and rapidly die off. This is usually seen during the period March – May but earlier attacks sometimes occur.
 
1.4 Wheat Bulb Fly: Attack by wheat bulb fly occurs from mid January to March. Symptoms of attack are the centre leaves of the plants turning yellow and dieing off (dead-hearts). The application of CHLOBBER is best timed at egg hatch (early January – February) and the persistent nature of CHLOBBER will give long-term control. Where egg hatch is prolonged, a second application of CHLOBBER should be made, particularly on organic soils where activity may be reduced. Note that activity will be limited if soil temperatures persists below 5°C but that later applications are the least effective method of control.
 
2. MAIZE.
2.1 Frit fly: CHLOBBER can be applied at 1.5 L/ha to control frit fly. Treatment should be made at early crop emergence, ideally before the crop has two leaves. The latest time of application is 21 days before harvest but later applications are less effective.
 
3. GRASSLAND (INCLUDING PASTURE). MANAGED AMENITY TURF AND AMENITY GRASSLAND
One treatment per year is permitted and the latest time of application is 14 days before harvest. Where lactating cows are to be grazed, they
should be excluded from treated areas for 14 days following application.
 
3.1 Frit fly: Ryegrass, fescues and bents are susceptible to attack by frit fly with both establishment and development of the new ley being
affected. Application of 1.5 L/ha CHLOBBER should be made at emergence or at the first sign of attack.
 
3.2 Leatherjackets: CHLOBBER should be applied to grassland after the beginning of November when larval populations are high or when
damage is first detected in the field. Early treatment will prevent over-winter feeding losses. Frosty weather inhibits the feeding activity of
lleatherjackets and thus activity of CHLOBBER will be lower under these conditions.
 
4. SPRAY APPLICATION TO BRASSICA AND VEGETABLE CROPS.
When treating broccoli, cabbage, calabrese, cauliflower, Chinese cabbage, and seed potatoes, a maximum of two applications are permitted
and the latest time of application is 21 days before harvest. When treating bulb onions only one application is permitted and the latest
application is also 21 days before harvest.
 
WATER VOLUME.
To ensure good coverage, an application volume of 600 – 1000 litres per hectare should be used.
 
4.1 Aphids: An application of 1.0 L/ha CHLOBBER can be used to control aphids in broccoli, cabbage, calabrese, cauliflower and Chinese
cabbage. Application should be made when the aphids are first seen, usually in early summer.
 
4.2 Small caterpillars, leatherjackets and adult whitefly: An application of 1.5 L/ha CHLOBBER can be used to control aphids in broccoli,
cabbage, calabrese, cauliflower and Chinese cabbage. Application for the control of small caterpillars should be made when the damage is first
seen, usually in early summer. Leatherjacket control should be applied pre-sowing and, where used against either of these pests, CHLOBBER
will give some control of adult whiteflies.
 
4.3 Cutworms: An application of 2.0 L/ha CHLOBBER can be used to control cutworms in broccoli, cabbage, calabrese, cauliflower, Chinese
cabbage, bulb onions and seed potatoes. NOTE: Seed potatoes should not be treated when suffering from severe drought stress since
damage may occur. The variety Desiree has been found to be particularly susceptible.
Cutworm caterpillars inhabit the surface layers of the soil where they feed on the roots and shoots of plants. Plants may be severed where they
emerge from the soil with most damage apparent in June or July. The crops listed above should be treated post-emergence either when attack
is forecast or when the damage is first seen,
 
5. DRENCH APPLICATION TO BRASSICA CROPS.
5.1 In field drench treatment: Leaf brassicas such as broccoli, Brussels sprout, cabbage, calabrese, cauliflower and Chinese cabbage may
receive one drench application of CHLOBBER in the field to control cabbage root fly. Treatment should be made within 4 days of planting out
or at the seedling stage for direct-sown crops after the 3rd week of April.
Dilute 100 mls CHLOBBER in 100 litres water and either apply 70mls of this solution to the base of each plant or, when treating whole rows,
apply 5 litres of solution to 20 meters row. The latest time of application is 4 days after transplanting or at the seedling stage.
 
5.2 Peat block/module drench treatment: Leaf brassicas such as Brussels sprout, cabbage, calabrese and cauliflower grown in peat blocks
or modules can also be treated prior to planting out for the control of cabbage root fly. One drench may be applied to the crop at the 3-4 leaf
stage provided that they are vigorously growing and that leaf condition is good. Spray the crop with water to moisten the leaves before
treatment. The drench of CHLOBBER solution is then applied and then the drench of CHLOBBER solution is washed from the leaves with a
second spray of water. The quantity of water applied at this stage should be sufficient to wash the CHLOBBER from the leaves but not so much
that CHLOBBER is leached from the block. Any leaching will reduce the efficacy of the treatment.
The dose to be applied is 100mls per 5000 blocks of a size 43 x 43 x 43mm in as dilute a solution as possible since higher concentrations
increase the risk of leaf scorch. Overdosing will result in transient yellowing of the leaves, particularly where high rates of a compost-wetting
agent have been used.
The volume of all the water to be applied can be determined by estimating the volume of water taken up by 5 blocks and then multiplying by
1000. This volume should be at least 25 litres per 5000 blocks (5mls per block). After application, wash deposits from the leaves with
fresh clean water as described above. Note that any loss of CHLOBBER due to leaching will reduce the control of cabbage root fly and lead to
contamination of the underlying greenhouse soil.
 
NOTES:
CHLOBBER must be applied alone when using this application method since tank-mixtures are likely to cause leaf scorch.
CHLOBBER should only be used to treat modules or blocks which will be planted out after the beginning of April.
CHLOBBER degradation in greenhouse soil can be very slow. Because drenches use high concentrations per unit area, even slight
residues may damage susceptible crops such as lettuce, celery, Chinese leaves and chrysanthemums etc. when planted several
months later. To avoid this risk, ensure that the volume of water applied during the drench treatments is not sufficient to wash the
CHLOBBER from the blocks or modules.
When applying the drench treatments, wear suitable protective gloves and protective clothing (Coveralls) when handling
contaminated surfaces and equipment. Shield non-target areas such as paths and the areas around the trays to be treated with
polythene sheeting and after application, wash down and dispose of safely.
CHLOBBER is strongly absorbed onto the peat in the blocks after approximately 24 hours but before absorption it is still liable to
leaching so caution is required when watering the plants. Ideally, treated modules should be transplanted shortly after treatment but,
if plants require watering prior to transport, apply the CHLOBBER drench several days before moving the plants so that they may be
watered without loss of CHLOBBER.
When planting treated modules, ensure that the planting depth does not allow untreated soil to come in contact with the transplant
stem above the block. Contact with untreated soil will reduce the efficacy of the treatment.
Where cabbage root fly populations are high, further application of CHLOBBER may be required to maintain control.
 
6. SUGAR BEET.
CHLOBBER can be applied at 1.5 L/ha to control leatherjackets and/or pygmy mangold beetle. One application of CHLOBBER at 1.5 L/ha is
permitted up to before the end of July in the year of harvest. Maintain an interval of at least 4 days between application of CHLOBBER and a
herbicide application to the beet crop and DO NOT treat beet crops under stress.
 
WATER VOLUME
When applying CHLOBBER as an overall spray to sugar beet, it should be applied in at least 200 litres water/ha.
 
6.1 Leatherjackets: Sugar beet that is to follow grass infested with leatherjackets is at risk of serious damage to the developing roots and the
ideal method of control is to treat the grass prior to destruction as described in section 3 above. Where the leatherjacket problem was not
foreseen or where a follow-up treatment is deemed necessary, CHLOBBER may also be applied direct to the sugar beet crop post-drilling at
the first sign of leatherjacket damage in the crop. Where the preceding grass crop was not treated, this may give poorer control but some
reduction in damage will be achieved.
 
6.2 Pygmy mangold beetle: Both the adults and the larvae of pygmy mangold beetle feed on the beet crop when it is establishing and an
early application of CHLOBBER will help to reduce the damage that this feeding causes.
 
7. APPLES, PEARS & PLUMS.
CHLOBBER can be applied at 1.0 L/ha to control aphids, apple blossom weevil, apple sucker, capsids, tortrix and winter moths when applied
pre-blossom and at 2.0 L/ha post-blossom to control aphids, codling moth, common green capsid, damson hop aphid, mealy plum aphid, late
winter moths, red spider mite, sawfly, Tortrix, pear sucker and woolly aphid. One pre-blossom and three post blossom applications are
permitted each year in apples, two applications per year in pears and three applications per year in plums. In apples, pear and plums the
latest time of application is 14 days before harvest.
 
WATER VOLUME
When applying CHLOBBER to apples, pears or plums, it should be applied in at least 250 - 2000 litres water/ha.
Pre-blossom treatments:
 
7.1 Apple blossom weevil, aphids, tortrix & winter moth: The best time of application for apple blossom weevil is at bud burst whilst aphids,
tortrix and winter moths are best treated at bud burst to pink bud in apples, white bud in pears and plums.
 
7.2 Capsids and apple sucker: These pests should be treated at the green cluster to pink bud stage. This will control al the above apple pests
except common green capsid, rosy leaf curling aphid and rosy apple aphid which require a post-blossom treatment, ideally at petal fall or soon
Post-blossom treatments:
 
7.3 Common green capsid, rosy leaf-curling aphid, rosy apple aphid and sawfly: Apply 2.0 L/ha CHLOBBER at petal fall. Where there is
a history of problems with rosy leaf-curling aphid, this post-blossom spray should follow a pre-blossom treatment.
7.4 Damson hop aphid and mealy plum aphid: Spray 2..0 L/ha CHLOBBER in May or June when these aphids are first seen in plums and
repeat as necessary as further aphid migrations colonise the orchard. A maximum of three applications is permitted in plums up to 14 days
before harvest.
 
7.5 Late winter moths and codling moth: Most seasons see this post blossom treatment applied in the last two weeks of June with a second
application made 14 days later where necessary. When treating winter moths in plums, spray at cot split which occurs 7 – 10 days after petal fall.
 
7.6 Tortrix moth: The treatments applied for codling moth control listed in 7.5 above will also control tortrix moth but where late attacks occur
in July or August, a third application may be required. Ensure a 14 day interval between the last application and harvest.
 
7.7 Aphids: Even where rosy leaf-curling aphid and rosy apple aphid have received a pre-blossom application of 1.0 L/ha CHLOBBER, it is
likely that a second application of 2.0 L/ha CHLOBBER will be needed at petal fall to achieve good control. The curled leaves caused by the
leaf-curling aphid afford some protection from the spray and so it is advisable to use at least 1000 litres/ha to achieve a penetrating spray when
treating this pest.
 
7.8 Red spider mite: red spider mites are usually controlled by a specific acaricide application but, where a post-blossom application of 2.0
L/ha CHLOBBER has been used to control the pests listed above, this acaricide spray may not be necessary. Check your populations before
 
7.9 Woolly aphid: Treatments applied to control codling and tortrix moth infestations will also control woolly aphids.
 
7.10 Pear sucker: To control pear sucker, it is necessary to apply 2.0 L/ha CHLOBBER in a high volume spray and to thoroughly soak the
trees. Note that the latest time of application is 14 days before harvest.
NOTE: Fruit crops must not be sprayed during flowering.
 
8. STRAWBERRIES.
Spray applications. CHLOBBER can be applied at 1.0 L/ha to control aphids and tortrix moth and at 1.5 L/ha to control red spider mite and
strawberry blossom weevil. CHLOBBER should be applied in 1000 litres water/ha and one application is allowed at 1.0 L/ha to control aphids
and tortrix with a further two applications allowed at 1.5 L/ha to control red spider mite or strawberry blossom weevil. Latest applications are
allowed up to 7 days before harvest.
 
8.1 Aphids: Where aphids occur in fruiting beds, application of 1.0 L/ha CHLOBBER should be made just before the start of flowering to
prevent a build up of populations. A second spray immediately after the fruit has been picked will complete control. If early colonisation
occurs, an application in March may be required with a follow-up spray in April – early May. Protected crops will also require treatment in March
with a second application if required just before flowering. Runner beds and maidens can be treated in mid May with repeat sprays at 2 – 3
week intervals.
 
8.2 Tortrix: Tortrix attack first appears in April in most seasons. Spray 1.0 L/ha CHLOBBER in 1000 l water/ha. Repeat treatments may be
required in summer or autumn in some seasons when pest pressure is high.
 
8.3 Red spider mite: Some populations of red spider mite have developed resistance to organophosphorus insecticides but where these do
not occur, an application of 1.5 L/ha CHLOBBER at the aphid timing will give control. Spray protected crops in March – early April.
 
8.4 Strawberry blossom weevil: Low populations of strawberry blossom weevil may be treated with 1.5 L/ha CHLOBBER at the first sign of
damage provided that the crop has not started flowering. Where populations are high two applications are likely to be needed with the first
application at the first signs of damage and a follow-up spray just before the crop starts to flower.
8.5 Drench treatment for strawberries: CHLOBBER can be used as a drench treatment in strawberries for control of vine weevil. Dilute 2.0
litres CHLOBBER in 1000 litres of water and apply this solution as a drench at a dose of 285 – 570mls per plant depending on the size and
species being treated. Note that the maximum concentration must not exceed 2.0 litres CHLOBBER per 100 litres water. Drench application
should be made to the crowns and the surrounding collar of soil after cropping and preferably after mowing. CHLOBBER can also be used for
the control of vine weevil larvae in the late-maturing varieties of strawberries such as the varieties Ostara, Rapella and Pegasus and in
double-cropping varieties such as Red Gauntlet. Applications can be made after the crop has been mown but no later than the end of
 
NOTE: Only one drench treatment is permitted per year
It is advisable to test the selectivity of the treatment on a small number of plants prior to treating the whole crop because of
the diversity of varieties and cropping systems employed in strawberry production.
DO NOT apply CHLOBBER as a drench to strawberries grown under cloches or plastic tunnels.
DO NOT treat crops during flowering.
 
9. RASPBERRIES.
CHLOBBER can be applied at 1.0 L/ha to control aphids, raspberry beetle and raspberry cane midge and at 1.5 L/ha to control red spider mite.
CHLOBBER should be applied in a minimum of 1000 litres water/ha for control of raspberry beetle and in at least 500 litres/ha for
control of the other pests. A maximum of three applications of CHLOBBER can be applied to raspberries but the total dose per annum must not
exceed 3.0 L/ha. The latest time of application is 7 days before harvest.
 
9.1 Aphids: Raspberry aphids are controlled by a pre-blossom spray of 1.0 L/ha CHLOBBER.
 
9.2 Raspberry beetle: Raspberry beetles are controlled by an application of 1.0 L/ha CHLOBBER at the first pink fruit stage.
 
9.3 Red spider mite: Red spider mite will be controlled by applications of CHLOBBER at the first pink fruit stage used to control raspberry
beetle. Later applications can also be made provided that the crop is not in flower.
 
9.4 Raspberry cane midge: Timing of the spray to control raspberry cane midge is critical. In southern England it is usually during early – mid
May while in Scotland it is usually required in late may – early June. Where cold spring weather prevails, delaying treatment by one week in
both areas is advisable. Seek specialist advice or time the first spray when small splits are seen in the young spawn and repeat 10 – 14 days
later provided that the crop is not in flower. Direct the sprays into the bottom 600mm of the young canes.
 
10. CURRANTS and GOOSEBERRIES.
CHLOBBER can be used at 1.0 L/ha to control aphids, capsids and caterpillars and at 1.5 L/ha to control red spider mites in redcurrants,
blackcurrants, whitecurrants and gooseberries. Application in 2000 litres/ha is recommended for control of red spider mite while the other pests
can be treated in water volumes of 1000 litres/ha. Three applications are permitted in currants but only one application is permitted in
gooseberries. The latest time of application in currants and gooseberries is 14 days before harvest.
 
10.1 Aphids: Spray 1.0 L/ha CHLOBBER at the first sign of aphid attack.
 
10.2 Capsids and caterpillars: Spray 1.0 L/ha CHLOBBER just before the first flowers open and again after flowering has finished (not
Gooseberries).
 
10.3 Red spider mite: Spray 1.5 L/ha CHLOBBER at fruit set and repeat as necessary (not gooseberries). A 14 day harvest interval is required
but a further application after picking can help to reduce the number of red spider mite hibernating to infest the crop the following season (not
gooseberries).
 
NOTE: DO NOT treat crops during flowering.
 
11. FORESTRY TREES.
CHLOBBER can be used as a directed spray onto stacks of cut logs in forests for control of ambrosia beetle, larch shoot beetle and pine shoot beetle.
Dilute 1.0 litres CHLOBBER in 100 litres water and apply 500mls solution per square meter of bark area, i.e. log length x
circumference of the log at the mid point. When spraying stacks, apply 700mls solution per square meter of stack surface area – top, sides and ends.
 
NOTE: DO NOT spray in cold windy conditions.
Conditions of Supply
All goods supplied by us are of high grade and we believe them to be suitable but, as we cannot exercise control over their storage, handling,
mixing or use or the weather conditions before, during or after application, which may affect the performance of the goods, all conditions and
warranties, statutory or otherwise, as to the quality or fitness for any purpose of our goods are excluded, and no responsibility will be accepted
by us or re-sellers for any failure in performance, damage or injury whatsoever arising from their storage, handling, application or use. These
conditions cannot be varied by our staff or agents whether or not they supervise or assist in the use of such goods
CropsBBCHRegistred normPreharvest Interval
Apple trees0 - 01 - 214
Black currants0 - 01.5 - 1.514
Broccoli0 - 02 - 221
Calabrese0 - 02 - 221
Cauliflower0 - 02 - 221
Chinese cabbage0 - 02 - 221
Corn, maize0 - 01.5 - 1.521
Gooseberries0 - 01.5 - 1.514
Grassland0 - 01.5 - 1.514
Headed cabbage0 - 02 - 221
Onions0 - 02 - 221
Pears0 - 02 - 214
Plums0 - 02 - 214
Potatoes0 - 02 - 221
Raspberries0 - 01.5 - 1.57
Red currants0 - 01.5 - 1.514
Spring barley39 - 591 - 1.5-
Spring oats39 - 591 - 1.5-
Spring wheat39 - 591 - 1.5-
Strawberries0 - 01.5 - 1.57
Sugar beets0 - 01.5 - 1.5-
White currants0 - 01.5 - 1.514
Winter barley39 - 591 - 1.5-
Winter oats39 - 591 - 1.5-
Winter wheat39 - 591 - 1.5-