The terms “Swath” and “Spray” width are often used interchangeably, but it’s important to make a distinction between the two. The two widths are completely different and have an important relationship with each other related to aerial application efficiency.
*Spray width is the “Spray” output width of the machine and is determined by;
- Droplet size (the bigger the narrower width)
- Nozzle and Pump settings
- Height above ground (Release height)
*Swath width (also known as Spray Swath) is the distance between each spray run, particularly in a grid or lawnmower pattern in a square field or paddock.
The relation between the two is very important as it determines the amount of “Overlap”.
Some chemical applications require half overlapping passes (Such as Grazon extra) and others require little to no overlap.
Why is Overlap so important?
- Spray drift mitigation (Particularly on a gusty day)
- Some chemical labels stipulate a required overlap (Following “On label” guidelines).
- To ensure adequate coverage between parallel runs
- To ensure appropriate usage of product for waste reduction
- It makes the job as efficient as possible by not! Doing unnecessary runs
I find in this industry and many other technical ones, its important to use the terminology correctly to avoid expensive or silly mistakes and provide clarity, especially to the perspective client.
Bit of a short blog this one! But I think it pretty much explains the difference between the two terms😉.
