Farm Guide VIC : 2014-15
Did you know? International research suggests keeping the boom height low can reduce the risk of spray drift. At 70cm, the number of driftable droplets capable of moving off- target is twice than at 50cm. At 80cm, that proportion can double again. Step 2: Find the most appropriate product for that goal There are many different products available, so check the one you use regularly is the most effective for your need. Ask your distributor: • Is it registered? Can I legally use it for this purpose? • Does it have a higher risk of vapour drift than similar products? • What impact would the required tank additives have on droplet drift? (Some surfactants may reduce drift but others could have the opposite effect.) Step 3: Identify the end target for that product What does the product need to hit to be most effective? You may need to directly target the green leafy area of problem weeds, or you might have to reach the soil surface to protect the crop. Consider how long the product needs to be retained in that area, how evenly it needs to cover it, and how closely spaced the droplets should be. Step 4: Check the spray quality needed to optimise performance Now you know your target, you can consider the spray quality. Bear in mind smaller droplets will achieve better coverage, but they also increase the risk of spray drift. Step 5: Choose the right nozzles and equipment for that spray quality Nozzles and equipment set-up can have a major impact on spray quality. Take both your operating speed and pump pressure into account. There are a range of high-tech spray nozzles, with proven results when it comes to improving chemical efficacy and performance and reducing the water volume required. Nozzles and equipment set-up can have a major impact on spray quality. Step 6: Assess the weather conditions It’s time to consider the external risks – the weather (particularly wind speed and direction) can have a major influence on drift risk. An assessment of risk should also consider any sensitive areas on or around your property such as other crops, neighbours properties or native vegetation. An online weather and spray window forecasting tool can help you make the right assessment for both ground and aerial spraying. Step 7: Keep spray records and do regular training To continually improve your spray performance, keep detailed records of your spray activity – including the conditions and measures taken to minimise potential risks. Training will keep you up to date on best practice, online modules are also available. Safer & more cost-effective crop protection These seven steps should help you manage every stage of crop protection more effectively – ensuring products hit the mark in the right way and at the right time – optimising product performance and ultimately driving improved yields and returns. Find out more at Syngenta.com.au or call the Syngenta Technical Product Advice Line on 1800 067 108. 36 Land&WaterManagement A delicate balance - c overage versus drift Smaller droplets will achieve better coverage, but can increase the risk of spray drift.