Decis Forte EC100

Wheat and barley

For the control of Barley yellow dwarf virus (BYDV) and some control of Opomyza (yellow cereal fly).

BYDV

Where BYDV has been a problem Crops drilled before mid-September: Spray when aphids first found in the crop or in mid-October. If the crop is sprayed before early October, a second spray in early November may be beneficial.

Crops drilled mid-September to early October: Spray any time from mid-October to early November.

Where BYDV has not been a problem or if crops are drilled after early October: Spray any time from late October to early November if aphids found or on specialist advice.

In mild winters further sprays may be needed.

Dose: 50 ml/ha in 200 litres of water.

Opomyza.

Apply at start of egg hatch (normally late January to February) or according to specialist advice. Crops most at risk are those drilled before mid-October in fields with a history of Opomyza.

Dose: 62.5 ml/ha in at least 200 litres of water.

Wheat, barley and oats

For the control of aphids on ears. Apply when two-thirds or more of heads are infested and numbers increasing (equivalent to 5 aphids per head).

Dose: 62.5 ml/ha in at least 200 litres of water.

Brussels sprouts, cabbage, cauliflower, swedes and turnips.

For the control of caterpillars, brassica flea beetle (Phyllotreta spp.) and some control of aphids‡ and whitefly.

Caterpillars, aphids and whitefly

For non-routine treatment apply at the first stage of attack or as a preventative spray.

Dose: 75 ml/ha in at least 400 litres of water.

For pre-harvest cleanup a reduced dose may be used when only short persistence of the product is required and applied 7 days prior to harvest.

Dose: 37.5 ml/ha in at least 400 litres of water.

Brassica flea beetle

Apply when damage is first seen. Repeat at 14-day intervals if necessary.

Dose: 75 ml/ha in 200–400 litres of water.

Peas and bean (broad, and field)

For the control of pea and bean weevil and pea midge

Pea and bean weevil

Apply at first signs of adult damage (leaf notching). Repeat after 2-3 weeks if prolonged and heavy attack.

Dose: 75 ml/ha in 200–400 litres of water.

Pea midge

Apply sprays when local warnings indicate for control of pea midge and improvement in pod numbers. A second application may be necessary if the risk remains high.

Dose: 62.5 ml/ha in 200–400 litres of water.

Peas

For the control of pea moth and some control of pea aphids. Apply according to the pea moth pheromone trapping system in conjunction with specialist advice.

Dose: 62.5 ml/ha in at least 400 litres of water.

Sugar beet

For the control of flea beetle, apply at the first signs of damage.

Dose: 75 ml/ha in 200-400 litres of water.

Spring oilseed rape and mustard

For the control of pollen beetle, cabbage seed weevil, brassica pod midge brassica flea beetle (Phyllotreta spp.)

Pollen beetle

Apply at green bud stage if pollen beetle numbers are at threshold levels. A second application may be necessary if pest attack is prolonged.

Dose: 75 ml/ha in at least 200 litres of water.

Cabbage seed weevil and brassica pod midge

Apply at green to yellow bud stage if cabbage seed weevil numbers are at threshold levels. Repeat during flowering if pest attack is prolonged. Applications during flowering will also give control of brassica pod midge.

Dose: 75 ml/ha in at least 200 litres of water when applied during flowering.

Brassica flea beetle

Qualified minor use recommendation based on limited effectiveness data. Apply when damage is first seen. Repeat at 14-day intervals if necessary.

Dose: 75 ml/ha in 200-400 litres of water.

Winter oilseed rape

For some control of Beet Western Yellows Virus (BWYV), control of cabbage stem flea beetle, useful control of rape winter stem weevil, control of pollen beetle, cabbage seed weevil and brassica pod midge.

Beet Western Yellows Virus (BWYV)

Best results will be obtained by spraying at the 2-4 leaf stage, but spraying at 5-10 leaves can give good control.

Dose: 62.5 ml/ha in 200 litres of water.

Cabbage stem flea beetle and rape winter stem weevil.

Apply when adults are seen to be causing leaf damage, usually late August to October. Spray for flea beetle larvae once they can be found in leaf stalks, usually late October/early November. A second spray may be necessary to control later hatches.

Dose: 62.5 ml/ha in 200 litres of water.

Pollen beetle

Apply at green bud stage if pollen beetle numbers are at threshold levels. A second application may be necessary if pest attack is prolonged.

Dose: 75 ml/ha in at least 200 litres of water.

Cabbage seed weevil and brassica pod midge

Decis Forte can be applied at any time during the flowering period if cabbage seed weevil numbers are at threshold levels, but best results will be obtained from applications made at the end of flowering on the main raceme (GS 49), usually 75% petal fall. Later applications may not prove effective, as Decis Forte is primarily a contact insecticide.

There is no spray threshold for brassica pod midge. Treatment decision should be based on previous local experience. Applications for seed weevil will also control brassica pod midge.

Dose: 75 ml/ha in at least 200 litres of water.

Lettuce (outdoor)

For the control of cutworms. Apply when pest first seen, use a second spray if necessary.

Dose: 62.5 ml/ha in at least 1000 litres of water.

Apples

For the control of caterpillars, apple sucker, apple grass aphid, codling and tortrix moth, sawfly and late capsid.

Caterpillars, apple sucker, apple grass aphid

Apply at green cluster.

Dose: 87.5 ml/ha in at least 200 litres of water or High Volume: 5 ml per 100 litres of water

Codling and tortrix moth, sawfly, late capsid.

Apply at about mid-June or 10-14 days after light or pheromone traps first record a steady emergence of moths. A further application may be applied three weeks later. A third spray may be necessary in late July or early August if tortrix moths are a problem.

Dose: 87.5 ml/ha in at least 200 litres of water or High Volume: 5 ml per 100 litres of water

Pears

For the control of pear sucker# overwintered adults, eggs and nymphs.

Apply pre-blossom – at any stage between bud burst and white bud or post-blossom – at first signs of pest build-up, any time from petal fall onwards. Do not apply during blossom period.

Dose: 87.5 ml/ha in at least 200 litres of water or High Volume: 5 ml per 100 litres of water.

Raspberries

For the control of raspberry beetle.

Apply when about 80% of the blossom is over, usually mid June. One spray when pink fruit is seen is usually adequate although for high quality dessert fruit two sprays may be applied. A further application may be made when the first fruit is colouring, usually about 2 weeks later.

Dose: Conventional volume only 125 ml/ha in 1000 litres of water.

Glasshouse crops – cucumbers and tomatoes

For the control of whitefly‡, scale insects, aphids, caterpillars, mealy bugs.

Apply when pest first seen. For whitefly, thoroughly wet plants, especially leaf under-surface. Repeat application as required.

Dose: High volume only 17.5 ml per 100 litres of water.

Glasshouse crops – peppers

For the reduction of caterpillars

Apply when pest first seen. Repeat application as required. Some effect on whitefly‡, scale insects, aphids and mealy bugs may also be seen.

Dose: High volume only 12.5 ml per 100 litres of water.

EAMU – Outdoor crops of carrot, horseradish, mallow (Althaea officinalis), parsnip

This Extension of Authorisation relates to the use of Decis Forte as an insecticide on carrot, parsnip, horseradish and mallow for control of carrot fly (Psila rosae) and cutworm (noctuid spp).

Application to be made via conventional hydraulic sprayer in a minimum water volume of 300 litres/hectare.

When used on crops/situations with a greater than 5m aquatic buffer zone this product must not be applied via hand-held equipment.

A minimum interval of 14 days must be observed between applications.

Applications must only be made between March and September.

An aquatic buffer zone of 7m must be observed.

Neither the efficacy nor the phytotoxicity of the product for which this extension of authorisation has been granted has been assessed and, as such, the user bears the risk in respect of failures concerning its efficacy and phytotoxicity.

EAMU – Durum wheat, rye, triticale

This Extension of Authorisation relates to the use of Decis Forte as an insecticide on Durum wheat, rye and triticale for the control of aphids, cereal flea beetle, yellow cereal fly, gout fly, saddle gall midge

When used on crops/situations with a greater than 5m aquatic buffer zone this product must not be applied via hand-held equipment.

An aquatic buffer zone of 7m must be observed.

To protect non-target insects/arthropods when applied to cereals respect an unsprayed buffer zone of 5m to non-crop land.

Neither the efficacy nor the phytotoxicity of the product for which this extension of authorisation has been granted has been assessed and, as such, the user bears the risk in respect of failures concerning its efficacy and phytotoxicity.

EAMU – Outdoor leek

This Extension of Authorisation relates to the use of Decis Forte as an insecticide on leeks for control of cutworm (noctuid spp) and leaf moth.

Application to be made via conventional hydraulic sprayer in a minimum water volume of 300 litres/hectare.

When used on crops/situations with a greater than 5m aquatic buffer zone this product must not be applied via hand-held equipment.

A minimum interval of 14 days between applications must be observed.

An aquatic buffer zone of 7m must be observed

Neither the efficacy nor the phytotoxicity of the product for which this extension of authorisation has been granted has been assessed and, as such, the user bears the risk in respect of failures concerning its efficacy and phytotoxicity.

EAMU – Protected spring onion

This Extension of Authorisation relates to the use of Decis Forte an insecticide on spring onion for control of leaf miner.

Application to be made via conventional hydraulic sprayer in a minimum water volume of 300 litres/hectare

A minimum interval of 14 days between applications must be observed.

An aquatic buffer zone of 7m must be observed

Neither the efficacy nor the phytotoxicity of the product for which this extension of authorisation has been granted has been assessed and, as such, the user bears the risk in respect of failures concerning its efficacy and phytotoxicity.

† Strains of some aphid species are resistant to many aphicides. Where aphids resistant to products containing pyrethroid insecticides occur, Decis Forte is unlikely to give satisfactory control.

‡ Glasshouse whitefly strains resistant to one or more groups of insecticides are widespread. Where strains resistant to products containing pyrethroid insecticides occur, Decis Forte is unlikely to give satisfactory control.

Note: resistant strains of the tobacco whitefly are also known to occur.

# Pear suckers resistant to one or more groups of insecticides are widespread. Where strains resistant to products containing pyrethroid insecticides occur, Decis Forte is unlikely to give satisfactory control. Where repeat treatments

Resistance Management