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When planning a spray program, it's important to consider the farm's location, its topography,
its size and its proximity to sensitive areas. Setting aside the time to plan a spray program
will ensure chemicals are used safely, effectively and responsibly. It's critical to factor
in sensitive areas that might be affected by your spraying and to understand the risks
involved. Drainage lines are a particular consideration as cold air flows down slopes
and can trap spray and run it off into creeks and rivers. Correctly calibrating all equipment
should also be a planning consideration. Resistance management is critical during planning to
ensure that we are rotating our chemical groups. The general principle is we should try and
use the largest droplet size available to us while still maintaining efficacy. Larger
droplets will reduce drift, but they may not eliminate it totally. Droplet size requirements
will increasingly appear on labels. If you're using fine droplets, up to 50 per cent of
the spray droplets produced will not go to ground under the pull of gravity.