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Granules containing 10% w/w oxamyl

Potatoes, sugar beet, carrots, parsnips

Potatoes: 40 to 55 kg/ha overall, 140 to 210 g per 100m row in-furrow
Sugar beet: 30 to 45g per 100m row in-furrow
Carrots and parsnips: 90g per 100m row

POTATO - Potato cyst nematode, Free living nematodes transmitting spraing (TRV)
SUGAR BEET - Docking disorder. Soil insects. Pygmy beetle. Mangold fly (leaf miner). Aphids.
CARROTS and PARSNIPS - Suppression of plant parasitic nematodes and reduction of fanging

Vydate 10G has no LERAP restrictions

15kg Ecolite container. 

 

For cyst nematode control, potatoes should be planted as soon as possible and within 1-2 days of treatment. Vydate 10G must be applied and incorporated within a single pass. Applicators with a working width wider than the rotavator should not be used. On potatoes a minimum interval of 80 days must elapse between application and initial haulm destruction and/or harvest, whichever comes first. Banded application of products in the potato ridge which may cause local acidification in the ridge should be avoided. Such materials include ammonium sulphate based fertilisers, liquid fertilisers and sulphur containing treatments. In the event of crop failure, a period of at least 80 days must be observed prior to planting of succeeding crops following a treatment of the plot with Vydate 10G or any other product containing the active substance.

 

Please see relevant text in each cropping/target pest section detailed below. Significant changes are detailed in the use of Vydate 10G on potatoes since last printing.

 

Specific instructions for the use of Vydate 10G on Jersey will be issued to all interested parties by Du Pont (U.K.) Limited in conjunction with States of Jersey Plant Health Laboratory.

 

The stewardship of Vydate 10G has two main objectives:

1. Maximise the benefits derived from product use.

2. Minimise the potential risks to the environment, operators and consumers.

It is a requirement that the operator is legally qualified (NPTC PA4 or PA4g) to apply nematicides. This is the responsibility of both the farm manager and operator.

Have you read the product label and understood the environmental and operator safety statements?

Completing COSHH (HSE website) and environmental risk assessments may suggest engineering solutions that will minimise risk to both environment and operator.

Is the machinery available to ensure that granules are fully incorporated within the soil at time of application?

 

All growers should ensure that the nematicide applicator is calibrated accurately prior to use each season. DuPont run a number of grower workshops each season and will visit growers to facilitate the calibration process. Should you require further assistance please contact the DuPont Technical Hotline on (01438) 734450.

 

DuPont strongly advise growers to check the flow rates of their applicator during the season of use. The aim here is to ensure the target dose is still being met to avoid under or over application across the whole working width of the machine. DuPont have supplied all growers enrolled in the Vydate Stewardship Programme with a set of Vy-Cal tubes which allow for quick in season checks.

 

To safeguard wildlife it is essential that Vydate 10G is well incorporated into the soil and that there are no granules left on the surface. Any Vydate 10G granule left on the soil surface, whether that be from poor incorporation, spillage during filling, or by failing machinery, will put wildlife and birds at risk. Exposed granules may pose a risk to wildlife. To prevent granules being left on the soil surface at row ends, shut-off the applicator two to three meters from the end of the working strip. This ensures that all granules have left the delivery tubes by the time the machine is lifted from the soil. A land-wheel continuing to turn after the applicator has been lifted out of work will cause product to be applied to the soil surface. All spills should be cleared immediately.

 

Following field planting or at the end of each planting session a rotavator should be used across the row ends to ensure any granules on the surface are fully incorporated.

 

Always read the label and machinery instructions before working with granular applicators.

 

With the development of enclosed transfer systems, such as the DuPont Ecolite system, the greatest risk to the operator is likely to be physical rather than chemical.

Ensure that there is good access to filling points and a stable platform is provided.

Always arrange machinery so that the user is working comfortably from the ground or from a raised stage and that filling takes place downwind to avoid any dust that might escape the hopper.

Always maintain the applicator to the highest standard, breaking pipework and failing bungs not only risks the environment but adds extra risk to the user.

 

All pesticides should be transported and stored in line with current codes of practice.

Always fill hoppers with nematicide at field of use.

Check container for tamper evidence and report any concerns.

Close transfer is a control to minimise operator exposure; check all Surefill adaptors and valves for damage.

For close transfer valves to function correctly all hopper lids must be securely fastened.

Provide filling platform when required for safe lifting.

Use PPE in line with COSHH and product label.

A safety feature of DuPont Vydate 10G containers is that they cannot be lifted from hopper until fully closed therefore minimising any possibility of spillage.

It is good practice before leaving any filling site to check for any pesticide spillage.

 

Growers should check the field 2-3 days post application for any bird or animal carcass that may be present. Any carcasses found may indicate poor incorporation of granules. (Clearly if granules are seen on the surface they should be incorporated immediately).

 

Potato Cyst Nematode: Globodera rostochiensis and G. pallida (all pathotypes). However in some soils with high organic matter, control of Globodera pallida may be less effective.

 

Planting should take place within 1-2 days of treatment.

 

Oxamyl (the active ingredient in Vydate 10G) is broken down in the soil by a chemical process called Hydrolysis. The rate of hydrolysis is driven by three main factors, soil pH, moisture, and temperature. The breakdown of oxamyl in the soil is slowest on low pH, dry, and cold soils. The use of acidifying agents (detailed below) can lower the pH in the soil ridge and can therefore reduce the rate of breakdown of oxamyl. This may result in a longer time period required for the oxamyl residues in the tubers to reach the Maximum Residue Limit (MRL). If soil conditions are unusually cold or dry the breakdown of oxamyl may also be delayed. Please take this into account when considering the use of the product on early planted short duration crops.

 

A minimum of 80 days must elapse from Vydate 10G application to the point of initial haulm destruction and/or lifting, whichever comes first.

Growers are advised to take a residue test to ensure the residue level within the tubers does not exceed the current MRL at point of proposed lifting. A minimum of 80 days must elapse from Vydate 10G application to the point of initial haulm destruction and/or lifting, whichever comes first.

 

Acidifying agents amongst which include materials such as ammonium sulphate based fertilizers, liquid fertilizers, zinc sulphate and sulphur treatments should be avoided. When acidifying agents are applied (especially in furrow/bed) they may cause a significant drop in pH within the potato bed/ridge which can delay the breakdown of oxamyl (the active ingredient of Vydate) in the soil.

 

Irrespective of soil pH if acidifying agents are applied to the same crop as Vydate 10G is it recommended the grower adopt a residue testing programme to ensure that residues within the tubers do not exceed the current Maximum Residue Limit (MRL) at the point of lifting.

 

It is critical that a potato crop is sampled in the correct way to ensure an accurate result is achieved. The MRL is set (November 2007) at 0.01 mg/kg of tubers (10 parts per billion). It is very important that no contamination of the tuber sample should occur. Think forensic science.

The MRL is set for potato tissue and not soil.

Sampling equipment should be cleaned before each sample

Potatoes should be stored in a clean bag

A representative sample should be taken from a W pattern through the field

Tubers should be washed to remove all soil, and then dried before dispatch to the lab

(The lab will not wash the tubers. Leaving soil on tubers may increase the chance of a residue detection in exceedance of the MRL)

Transport and store the sample in a clean environment

 

Applications may be made on all soil types. However, its activity may be decreased on shell marl soils with greater than 60% calcium carbonate content.

 

The rate of use depends on two factors:

The duration of crop growth

The level of nematode infestation

 

It is important that PCN sampling is carried out thoroughly and accurately. The most accurate method of measurement is eggs/gram of soil.

 

For early potatoes (salads, punnet crops etc.) with a planned harvest date at or shortly after the pre harvest interval described above, DuPont recommend a rate of 40kg Vydate 10G/ha broadcast and incorporated. This rate has proved effective at managing PCN for the shorter growth period associated with these crops.

 

For crops such as second earlies or maincrop which will have a longer growth period/pest exposure, Vydate 10G may be applied at rates of 40 to 55kg/ha broadcast and incorporated. The 55kg/ha rate may be used on all soil types. This rate offers the most reliable control of PCN especially on soils infested with Globodera pallida.

 

Vydate 10G applied broadcast and incorporated will suppress Free Living Nematode feeding damage. However the use of Vydate 10G in this fashion is generally not as effective in the reduction of spraing symptoms as an in furrow application of 210g Vydate 10G per 100m row.

Machinery is calibrated using ‘real product’ at the start of each season.

In season, flow rates are checked using Vy-Cal™.

In both of these operations please ensure correct PPE is used. The aim will be to ensure an even distribution of Vydate 10G granules within the ridge/bed to ensure that developing roots/daughter tubers are protected. Care should be taken to ensure that banding (concentration of product in one area of soil profile) and/or overdosing of Vydate 10G granules due to poor incorporation or machinery set-up, does not occur. If product is banded, control of PCN may be reduced. Banding in the soil zone of daughter tuber production may also increase the risk of oxamyl residues being detected. DuPont recommend the use Positive Displacement Applicators. These applicators have an individual metering unit for each outlet which allows individual calibration and therefore uniformity of application across the working width. DuPont have concerns with the use of applicators fitted with a single metering unit serving multiple outlets. These machines require some form of secondary product split before reaching the outlet. Experience has shown that this type of applicator may have significant variation in output per outlet risking under or overdosing across the working width.

 

For best results DuPont recommend the use of rotavators which will evenly incorporate the granules in the top 10-15cm of soil working in a vertical plane, such as a Rotospike (e.g. Baselier).

 

DuPont do not recommend the use of Power Harrows working in a horizontal plane (in the same fashion as stirring a spoon in a cup of liquid). These machines may not adequately mix the Vydate 10G granules in the soil profile which can result in banding or over concentration of product in the top 5cm of soil.

Please ensure that fishtail outlets are sited to ensure an even granule application to the soil surface within the working width of the rotavator. Both the distance between fishtails and their height above the ground must be checked. Avoid granule application outside the working width of the machine either by direct placement or soil movement as this may result in uneven dosing of product.

 

Apply Vydate 10G at 55kg/ha (40kg max for short duration crops) to minimise any effects of banding/dilution. Application of product on “star” type separators must be monitored carefully as banding of product can occur.

 

Vydate 10G must be evenly applied overall to the soil during seed-bed preparation before planting. Guide settings for the appropriate machinery are given in the calibration section. If unsure seek advice.

 

Typically the granules must be thoroughly incorporated to a depth of 10-15cm (to cover rooting zone) immediately after application. Rotary cultivators working in a vertical plane (such as a Rotospike e.g. Baselier) are recommended for incorporation.

 

The use of stone and clod separation equipment to incorporate Vydate 10G can result in poor control of nematodes due to dilution or banding in the soil. Extra care must, therefore, be taken to ensure even distribution of the product in the top 10-15cm of soil when mechanical stone separation equipment is used.

Application equipment utilising hydraulic or electric motors are prone to overdosing at the start and finish of a row. This overdosing is linked to the time taken for the tractor to reach full forward speed at the start of the row and late disengagement of the motor at the end of the row. Growers are advised to fit a drive isolation device which allows the motor to be started only when the tractor has reached full forward speed and also allowing the motor to be disengaged well before the end of the row. Overdosing must be avoided to help prevent residue exceedences.

 

Oxamyl (the active ingredient in Vydate 10G) is broken down in the soil by a chemical process called Hydrolysis. The rate of hydrolysis is driven by three main factors, soil pH, moisture, and temperature. The breakdown of oxamyl in the soil is slowest on low pH, dry, and cold soils. The use of acidifying agents (detailed below) can lower the pH in the soil ridge and can therefore reduce the rate of breakdown of oxamyl. This may result in a longer time period required for the oxamyl residues in the tubers to reach the Maximum Residue Limit (MRL). If soil conditions are unusually cold or dry the breakdown of oxamyl may also be delayed. Please take this into account when considering the use of the product on early planted short duration crops.

 

Growers choosing to use Vydate 10G in furrow are advised to implement a residue test to ensure the residue level within the tubers does not exceed the current MRL at point of proposed lifting. A minimum of 80 days must elapse from Vydate 10G application to the point of initial haulm destruction and/or lifting, whichever comes first. For more information on likely harvest intervals please consult Du Pont (U.K.) Limited or your agronomist.

 

Acidifying agents amongst which include materials such as ammonium sulphate based fertilizers, liquid fertilizers, zinc sulphate and sulphur treatments should be avoided. When acidifying agents are applied (especially in furrow/bed) they may cause a significant drop in pH within the potato bed/ridge which can delay the breakdown of oxamyl (the active ingredient of Vydate) in the soil.

 

Irrespective of soil pH if acidifying agents are applied to the same crop as Vydate 10G is it recommended the grower adopt a residue testing programme to ensure that residues within the tubers do not exceed the current Maximum Residue Limit (MRL) at the point of lifting.

 

Du Pont (U.K.) Limited offers two in furrow recommendations for Vydate 10G to help manage free living nematodes in the potato crop. This allows the agronomist/grower to choose an appropriate rate to match the perceived risk for each field situation.

 

140g/100m row:

Reduces Free Living Nematode feeding damage.

Lowers the multiplication rate of Free Living Nematodes.

Offers some yield protection.

210 g/100m row:

Reduces Free Living Nematode feeding damage.

Lowers the multiplication rate of Free Living Nematodes.

Offers some yield protection.

Provides some reduction in the transmission of TRV by reducing Free Living Nematode feeding activity during the early stages of crop development. However this will be influenced by some of the factors outlined below under the heading “With regard to Spraing”.

 

With regard to Spraing:

Potato varieties vary in terms of their susceptibility to express the symptoms of Spraing. This should be taken into account when choosing to plant fields that are considered “at risk” from Spraing.

Planting cereal crops, especially spring barley, within the rotation prior to potatoes and good broad-leaved weed control within these crops will reduce the TRV level in the field.

Currently there is insufficient scientific evidence to support a correlation between FLN numbers and expression of Spraing symptoms within a crop.

Detection of TRV within the field weed population is probably a more valid test for risk management purposes should it become commercially available.

With regard to the use of nematicides to reduce the symptoms of spraing:

Vydate 10G offers a reduction in the symptoms of spraing. As with all nematicides it may not always provide complete control. There is a risk that treated crops may still show symptoms of spraing and could be rejected by the processor.

When using Vydate 10G:

Where possible, ensure that fishtails are fitted to outlets to give the best granule distribution.

The granule applicator must be linked to forward speed, e.g. direct drive from planter wheel.

Machinery is calibrated using real product at the start of each season. When using land wheel applicators, machinery should be rechecked at least once in the field and periodically during the season.

In season flow rates should be checked using Vy-Cal™.

 

Vydate 10G should be used wherever sugar beet seedlings are vulnerable to early insect attack, or where the field has a history of Docking disorder. It is particularly important to protect seedlings when drilling to a stand. Vydate 10G also suppresses early infestations of aphids and delays the associated onset of virus yellows.

 

Longidorus spp. and Trichodorus spp. (Docking disorder). The soil pest complex including millipedes. Pygmy beetle. Mangold fly (Leaf miner). Aphids (early infestations).

 

All commonly grown varieties may be treated.

 

At drilling.

 

A mimimum of 12 weeks must elapse from Vydate 10G application to crop lifting.

 

Applications may be made on all soil types.

 

For control of Docking disorder and to improve plant stand by giving some protection against early attack by millipedes, pygmy beetle and leaf miner. 30g/100m row, which is equivalent to 6kg/ha at 53cm row spacing.

 

The granules must be applied in the seed furrow at drilling. Guide settings for the appropriate application machinery are given in the calibration section.

 

Vydate 10G can be used for the suppression of plant parasitic nematodes and for some reduction of fanging caused by nematodes.

 

All commonly grown varieties may be treated.

 

At drilling.

 

A minimum of 12 weeks must elapse from Vydate 10G application to crop lifting.

 

Applications may be made on all soil types.

 

Apply Vydate 10G at 90g/100m row, which is equivalent to 18-20kg/ha depending on bed sizes (calculated as 1.8m and 2.0m width).

 

Ensure that granules are adequately covered by soil during the application process. On certain drill types this may require the delivery fishtails to be moved forward, closer to the point of seed delivery.