LO 6.3 - 6.4 Assessing weather conditions & Carrying out risk assessment Flashcards
- outlines suitable conditions
Question
List 5 weather conditions.
Weather Conditions
Weather Conditions to assess..
* Windy
* Temperature
* Too dry
* Rainfall
* Sunshine
Weather Conditions
Question
How does wind effect spraying?
Weather Conditions
Wind
* Avoid spraying in absolutely still days, as convection currents may cause drift in unpredictable directions.
Weather Conditions
Question
How does Temperature effect spraying?
Weather Conditions
Temperature
* Especially if spraying inside glasshouse or polytunnel
Weather Conditions
Question
How does weather that’s too dry effect spraying?
Weather Conditions
Too dry
* Some residuals require moisture in the soil to work.
Weather Conditions
Question
How does rainfall effect spraying?
Weather Conditions
Rainfall
* Do not spray during or before rainfall.
* The use of sticking agents (Sprayfast) will help increase rainfastness.
* Spraying during a light mist may be beneficial, as the pores on the plant are more open and there can greater uptake chemicals.
Weather Conditions
Question
How does Sunshine effect spraying?
Weather Conditions
Sunshine
* Avoid hot sunshine (may cause scorch and burning of the foliage)
* Early morning and late evening are most effective.
Weather Conditions
Info Graphic
The Beaufort Scale
Weather Conditions
Weather Conditions
Info Graphic
The Beaufort Scale
Weather Conditions
Weather Conditions
Info Graphic
Spot the Problems
How many can you identify?
Weather Conditions
Weather Conditions
Question
Spot the Problems
How many can you identify?
Risk Assessment
Risk assessment
* Inappropriate spray nozzle
* Prevailing wind
* Respirator
* Lack of Signage
* Household gloves?
Possible contamination of:
* Humans
* Aquatic life
* Vegetables
* Hedge
* Household
Risk Assessment
Question
Carry out Risk Assessment
Risk Assessment
Carry out Risk Assessment
* Identify the hazards, assess the risk and put controls in place
* Take into account the prevailing weather conditions and how these are likely to affect the spraying operation and performance
Risk Assessment
Question
Important to plan ahead.
Risk Assessment
Mixing Pesticide Solution
Risk Assessment
Question
Planning the Work Area
What goes into planning the work area?
Risk Assessment
Planning the Work Area
* Check wind direction, work at right angles to the wind
* Never operate a knapsack while walking into the wind.
Risk Assessment
Question
What are the Procedures to minimise drift?
Risk Assessment
Procedures to minimise drift:
* Lower Pressure
* Anti-drift nozzle
* Spray at correct height
* Assess weather conditions
* Use spray hood to reduce drift
* Forward Speed
Risk Assessment
Question
What are the Procedures to minimise drift?
Risk Assessment
Procedures to minimise drift:
* Lower Pressure
* Anti-drift nozzle
* Spray at correct height
* Assess weather conditions
* Use spray hood to reduce drift
* Forward Speed
Risk Assessment
Question
How does lower pressure help minimise drift?
Risk Assessment
- A lower pressure will give a larger droplet size, different nozzles require different pressures and modern nozzles may be able to act at both high and low pressures.
- At low pressure the nozzle may give a larger droplet size. The same nozzle at high pressure will result in fine droplets.
- Reducing the spray volume may result in improved coverage.
Risk Assessment
Question
How does an Anti-drift nozzle help minimise drift?
Risk Assessment
Anti-Drift Nozzle
* This range of nozzles can produce a fine to coarse droplet size, depending on the pressure. The AD120-015 utilizes pressures from 1.5 to 6.0 bar. The lower pressure allows from medium droplet size while the higher pressure results in fine droplets.
* A ‘prechamber’ helps to reduce fine droplet size, giving optimised atomisation of the plant protection product.
* The prechamber or pre-atomiser may be removed without tools.
* Spray angle of 90-120 degrees and can be used with a knapsack both outdoors and in glasshouses.
Risk Assessment
Question
How does spraying at the correct height help minimise drift?
Risk Assessment
Spray at correct height
* Check the nozzle data sheet for the correct/ recommended spraying height.
* Clogging and spray height are the most common causes of non-uniform spray patterns, resulting in streaks, untreated areas or over use of the product.
Risk Assessment
Question
How does assessing the weather conditions help minimise drift?
Risk Assessment
Assess weather conditions
* Make sure the weather conditions are conducive to pesticide application.
Risk Assessment
Question
How does using a spray hood help minimise drift?
Risk Assessment
Use Spray Hood to reduce drift
* Used to prevent unwanted drift of herbicides onto non-target crops.
* The shape of the sprayhood matches the spraying pattern of a fanjet nozzle.
Risk Assessment
Question
How does forward speed help minimise drift?
Risk Assessment
Forward Speed
* Make note of the terrain, is it similar to the ground you used to calibrate the knapsack?
* Walking speed is a variable in knapsack sprayer operations.
* According to research from the Tropical Pest Management Journal, training did not improve the users ability to walk at a given speed, however it did reduce the variation between different users.
Risk Assessment
Question
What are seven ways to reduce environmental risks?
Risk Assessment
Reducing environmental risks:
* Following correct spray procedures
* Correct storage of chemicals
* Wearing the proper PPE
* Weather conditions
* Equipment in good working order
* Are you using the correct chemical?
* Is the product still in use?
Risk Assessment
Question
What are six Golden rules of safe pesticide use?
Risk Assessment
Six Golden rules of safe pesticide use.
* Only use pesticide when necessary.
* Only use approved products.
* Store, transport and use pesticides correctly.
* Always read and follow label instructions.
* Use PPE.
* Keep detailed records:– of stock held – applications made – reason for application – result of application.
Risk Assessment
