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Potatoes Application

Broad-leaved crops present a completely different target to cereals, with horizontal leaves interlocking into a closed canopy. Persuading the spray into that canopy is tricky – often only 10-15% of spray ends up where it's needed. Big drops hardly get below the surface, but fine drops can ride in horizontally on air turbulence.

Weed control


Water volume*
100–200 l/ha depending on nozzle choice

Nozzle choice
Gold 04 Potato nozzle for slower applications or Orange 05 Potato nozzle, where conditions allow more forward speed - use alternately backward and forward. If conditions are marginal, use an equivalent sized AMISTAR nozzle. 

Application speed
Gold 04 nozzle: 8-12 km/h
Orange 05 nozzle: 12-16 km/h 

Other comments
Keep the boom low - 50 cm above the ridge and pressure moderate - 2 to 2.5 bar.
Coverage of both sides of the ridge is imperative - avoid spraying in cross winds.

 

Blight control


Angled nozzles such as the Syngenta Potato Nozzle, produce less drift and positively push a medium spray where it's needed. As the crop develops and the canopy closes, these nozzles can double the amount of chemical reaching the lower parts of the plants.

Water volume*
200 l/ha

Nozzle choice
Gold 04 Potato nozzle for slower applications or Orange 05 Potato nozzle where conditions allow more forward speed - use alternately backward and forward.  If conditions are marginal, use an equivalent sized AMISTAR nozzle. 
 
Application speed
Gold 04 nozzle: 8-12 km/h
Orange 05 nozzle: 12-16 km/h
 
Other comments 
Keep the boom low - 50 cm above the ridge and pressure moderate - 2 to 2.5 bar.
Lower volumes may be used in the very early part of the season but 200 l/ha is best for the majority of sprays

 

Desiccation


Using foliar desiccation sprays usually means a 2-spray programme (depending on the size of the haulm). The first spray takes the leaves off and the second then targets the stems.

Water volume*
For very big haulms use 400 l/ha for the first spray to open up the crop, then use 200 l/ha for the second spray. 200 l/ha has been shown to be equal to or better than higher volumes after two sprays.

Nozzle choice
Gold 04 nozzle: 8-12 km/h
Orange 05 nozzle: 12-16 km/h 
Use alternately forwards and backwards.
 
Application speed
As above 

Other comments
If the crop is dense or growing vigorously, use 400 l/ha for the first spray; follow up 5 days later at 200 l/ha. 

 

*Please refer to the product label for water volumes.  Growers can reduce water volumes as long as they adhere to the HSE/DEFRA Code of Practice for Using Plant Protection Products. Please refer to paragraph 4.6.4, page 81 of the HSE/DEFRA Code of Practice for Using Plant Protection Products.