THE EA INDENTIFIES A STEWARDSHIP PROGRAMME FOR THE USE OF ‘ARTICLE 53’ FOR INSYST (MAPP 13414)
NOTE THERE ARE A NUMBER OF IMPORTANT CHANGES TO PREVIOUS USE
Monitoring
• Growers are encouraged to follow BBRO weekly bulletin updates and regular website updates for aphid numbers and their virus content .
• The BBRO will again operate an enhanced yellow water pan network in 2021 to monitor winged aphids migrating into sugar beet fields. This information will provide an early warning of pest pressure and to encourage growers and agronomists to monitor
crops for subsequent wingless aphid build-up, as the threshold for treatment is based on wingless green aphid numbers.
• Each week growers/BASIS agronomists will count the number of green wingless aphids per plant, at least 12 plants in 5 locations across the fields, providing an indication of wingless aphid numbers on the crop. The threshold trigger for spraying of 1 green wingless aphid per 4 plants (3 green wingless aphids per 12 plants) up to the 12-leaf stage.
• In February/March 2019 the BBRO issued every grower and agronomist with a ‘credit-card’ style magnifying glass (see image), via the BBRO Reference book and Winter Conferences, to emphasise the need for aphid identification before treatment.
In 2021, further cards will be re-issued to growers and agronomists and BBRO have produced a video (available March 2021) to aid aphid identification in the field.
• If numbers exceed the threshold for treatment by agronomists of one green wingless aphid per four plants up until 12 leaf-stage then treatment will be justified. (The threshold increases to one green wingless aphid per plant between the 12 and 16 leaf stage).
• If further sprays are made available or required ongoing aphid monitoring by agronomists (alongside data from BBRO) will identify those fields requiring additional treatment.
Justification and treatment threshold
• Use of any foliar spray for aphid control on sugar beet will be based on crop monitoring and pest identification by BASIS qualified growers or agronomists and/or supported by real-time updates of aphid numbers by the BBRO. Subsequent treatment will then only occur once the recognised aphid threshold is exceeded at the appropriate growth stage. (1 green wingless aphid per 4 plants up to 12 leaves and increasing to 1 green wingless aphid per plant with 12 to 16 leaves).
• All sugar beet grown in the UK is assured by the Red Tractor Combinable Crops and Sugar Beet Standards, which have as a requirement that records of applications must include information on ‘justification/target for application’.
Spray Programme
THIS IS A NEW SPRAY PROGRAMME FOR 2021 AND MUST BE FOLLOWED STRICTLY.
INSYST CAN ONLY BE USED IN THE SECOND SPRAY APPLICATION SLOT.
The following composition of foliar spray programme involving the authorised product ‘Teppeki’ (MAPP 12402) and Article 53 Authorisation for ‘Insyst’ (MAPP 13414) must be used, following all relevant authorised conditions of use for each product:
One spray programme: ‘Teppeki’
Two spray programmes: Teppeki + Insyst
Integrated On-Farm Measures
• Growers are advised to remove all root remnants, sugar beet cleaner loader spoil heaps etc. that could harbour aphids and virus to minimise the risk of subsequent pest pressure and virus infection BEFORE sowing the 2021 crop.
• In addition, BBRO will advised growers to destroy any cover crops six weeks ahead of sowing their next beet crop as certain species (especially brassica species) can host aphids and/or virus(es).
• Minimise harvester losses to reduce potential sources of regrowth
• Monitor spoil heaps and destroy any growth
• Revisit fields regularly and eliminate groundkeepers
• Stop aphids green-bridging the virus by destroying winter cover crops at least five weeks before drilling
• Control crop volunteers and virus-hosting weeds with well-timed herbicides and cultivations
A summary of the key EA conditions and stewardship plan relating to use of InSyst were published in the 2021 Advisory Bulletin No 6, released on the 6th May and are outlined below. It is imperative that these points are observed.
- Growers/agronomists should follow the BBRO Advisory Bulletin updates and regular website updates for aphid numbers and their virus content. This information will provide an early warning of pest pressure to encourage growers and agronomists to monitor their crops for subsequent wingless aphid build-up, as the threshold for treatment is based on wingless green aphid numbers.
- Growers/agronomists should count the number of green wingless aphids per plant, at least 12 plants in 5 locations across the fields, providing an indication of wingless aphid numbers on the crop.
- The threshold trigger for spraying is 1 green wingless aphid per 4 plants (3 green wingless aphids per 12 plants) up to the 12-leaf stage (the threshold increases to one green wingless aphid per plant between the 12 and 16 leaf stage). BBRO have issued every grower and agronomist with a ‘credit-card’ style magnifying glass, to aid aphid identification in the field.
- All sugar beet grown in the UK is assured by the Red Tractor Combinable Crops and Sugar Beet Standards, which have as a requirement that records of applications must include information on the ‘justification/target for application’.
- This Emergency Authorisation relates to the use of ‘InSyst’ (MAPP 13414) for the control of peach potato aphids (Myzus persicae) to prevent virus yellows infection. Applications to be made via horizontal boom sprayer in water volumes of 200 to 600 litres water per hectare.
- A single application of InSyst at the rate of 250g/ha is approved in sufficient water volume to achieve the required spray penetration into the crop and uniform coverage necessary for optimal pest control. Crops must only be sprayed if thresholds are breached and following an initial spray of Teppeki.
- Growers must adhere to 12m aquatic buffer zone regulations and undertake a recorded LERAP. Attention is drawn to protecting non target insects/arthropods and ensuring spray equipment must be fitted with three-star drift reduction technology and respect an unsprayed buffer zone of 5 m to non-crop land. This is a statutory requirement.
- The maximum total dose of acetamiprid must not exceed 100g acetamiprid /ha in any three-year period in the same field.
Click here to access a full copy of the EA approval 'conditions of use'.
