There are many different ways you can spray your blueberry farm. You could use a backpack spray blower, spray tank, or commercial sprayer. When using a backpack spray blower you mix in the desired ratio and it will mist the blueberry plants. The backpack spray blower is worn on the back and it is easy to move from plant to plant and completely cover the blueberry plants. A spray tank can be put on a four wheeler, mower, etc. and can be used while sitting on your motorized vehicle. Commercial sprayers can be hooked up to a tractor and be controlled from the tractor.
There are basically three things that blueberry plants may need to be sprayed with, they are fertilizer, fungicide, & insect repellent.