Vegetables are a high input crop requiring multiple applications throughout the season. Nozzle selection is vital especially with the wide range of different shapes and surfaces that chemical is applied on. Herbicide application is often when the crop is small and therefor coverage is vital.
Herbicide Application
Timing
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Pre-emergence good seed bed
200
3D ninety alternating forward and back
3D ninety alternating forward and back
An AMISTAR nozzle produces 40 drops/cm2
Pre-emergence cloddy seed bed
200-400
3D ninety alternating forward and back
3D ninety alternating forward and back
Cloddy seedbeds reduce weed control. Even coverage on both sides of clod achieved with angled nozzles
Post-emergence soil applied
200-400
Syngenta vegetable nozzle 06 or 08
AMISTAR nozzle
Narrow angle fan best for reducing spray retained on crop leaves
Graminicide
100-200
3D nozzle spraying forwards and backwards
AMISTAR nozzle
Angled sprays typically double the spray retained on grass weeds
Broad-leaved weeds
100-200
3D nozzle spraying forwards and backwards
3D ninety alternating forward and back
Increasing water volume increases droplet size reducing spray retention on crops such as alliums
Insecticide and Fungicide Application
Cabbage
Field trials have shown that tailored application advice will improve efficacy of products at different timings. For cabbages this is defined as when the crop are small and when they are hearted.
Growth stage
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Small open
100-200
AMISTAR nozzle
AMISTAR nozzle
Run-off is the enemy of small plants
Hearted
300-800
Syngenta vegetable nozzle 06 or 08
AMISTAR nozzle
Brussels Sprouts
Recommendations vary depending on the size of the crop at the time of application. Early herbicides can be applied using conventional technology however the later fungicide applications can have their effect maximised on the buttons by the specific recommendations below.
Growth stage
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Small open
100-200
AMISTAR nozzle
AMISTAR nozzle
Run-off is the enemy of small plants
Large
300-500
Lechler ID3 120-05
Lechler ID3 120-05
For deposition onto the buttons and lower leaves we recommend Lechler ID3 120-05, 300 l/ha, consider using an approved adjuvant oil, especially when crops have significant wax
Onions
In onion crops it is important that the application method is right as crop coverage is vital, an angled spray is vital to get the best coverage possible.
Growth stage
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Small
100-200
3D ninety alternating forward and back
3D ninety alternating forward and back
Coverage, run-off and missing the target are the problems of onions. Angled nozzles increase coverage and deposition
Large
200
3D ninety alternating forward and back
3D ninety alternating forward and back
Using air induction nozzles increases droplet size and increases penetration and coverage deeper in the crop canopy. Consider using an approved adjuvant which can help increase coverage and deposition
Carrots
Carrot crops are easy to cover when they are small however it is very difficult to achieve good coverage of the crown using conventional technology, especially when the canopy is large.
Growth stage
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Small
100-200
3D nozzle or Syngenta potato nozzle 04 or 05
AMISTAR nozzle
Carrots are good at catching spray. Angling nozzles e.g. Twin Cap will give best results
Large
300-400
Syngenta vegetable nozzle 06 or 08
Syngenta vegetable nozzle 06 or 08
65 degree fan the best for penetrating to crown
Lettuce
Lettuce crops move through the growth stages quickly it is important that you hit it at the right time and get the maximum coverage possible.
Growth stage
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Small open
100-200
AMISTAR nozzle
AMISTAR nozzle
Run-off is the enemy of small plants
Hearted
300-800
Syngenta vegetable nozzle 06 or 08
Syngenta vegetable nozzle 06 or 08
Leeks
Leek crops can be hard to target with a large amount of run off meaning that high water volumes are vital.
Growth stage
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Small
100
3D nozzle, angle spray forwards and backwards
3D ninety alternating forward and back
Coverage, run-off and missing the target are the problems of leeks. Angled spray important. High volumes = run-off. If targeting thrips in shaft use the AMISTAR nozzle. The addition of an adjuvant also helps
Large
200-300
Syngenta potato nozzle 04 or 05
3D ninety alternating forward and back
Angle spray forwards and backwards
Cauliflower
Cauliflower crops change throughout the season with run off being the major concern it is important use the correct nozzle.
Growth stage
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Small pre-curd
200-300
Syngenta potato nozzle 05
AMISTAR nozzle
Run-off is the enemy of small plants
Developing curds
200-300
Syngenta potato nozzle 05 or Syngenta vegetable nozzle 06
Syngenta vegetable nozzle 06 or 08
If leaves are the target use the potato nozzle, if curds are the target use the vegetable nozzle
Asparagus
Asparagus is a small target to hit in the field therefore accuracy is key make sure that the nozzles allow for maximum results.
Growth stage
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Fern application
250-350
Twin Cap Syngenta vegetable nozzle and standard flat fan nozzle alternating or a dropleg sprayer with standard flat fan nozzle
AMISTAR nozzle
Keep water volume below 350 l/ha to avoid run-off
Courgettes
Courgettes come in a varying sizes and require optimum coverage of application as run off is a major concern.
Growth stage
Water volume (l/ha)*
Best nozzle
Reduced drift option
Notes
Small plants pre-fruit
200
Standard flat fan nozzle
AMISTAR nozzle
Run-off is the enemy of small plants
Large fruiting plants
200-300
Standard flat fan nozzle or Droplegs with standard nozzle
AMISTAR nozzle
Applications through fleece
Fleece covers the canopy of the crop meaning that any application needs to penetrate through the surface of the fleece in order to get to the target.
Water volume (l/ha)*
Best nozzle
Reduced drift option
300
Syngenta vegetable nozzle 06
Syngenta vegetable nozzle 06 or 08
*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.