Spray to protect your crops Part 6: Using the knapsack sprayer
Compiled by J Fuls (Pr Eng)
Picture: extension.unh.edu
R
ain is a blessing, but it may also stimulate an overcrowding of weeds between your precious crops. The knapsack sprayer will be your right hand tool when these times arise. It is therefore very important to know how to use it properly. This month we shall look at how to use the knapsack sprayer for optimal spraying results. Know your sprayer As with any tool, it is important to know the knapsack sprayer. Study the manual that came with the sprayer and be sure you understand how to use it and what the purpose of each part is. Maybe someone can help you by making sure it sits comfortable on your back. One cannot do a good job if the sprayer does not sit comfortable. Practice before you spray in the field. First practice how hard you must pump, this is, what pressure does one
Fill the tank with water and adjust the shoulder straps until they fit well. Also feel the handling of the pumping lever while you spray.
need. If you don’t pump correctly, you will not get the right shape of spray or droplet size from the nozzle.
ProAgri Botswana / Namibia / Zimbabwe 06
Fill the sprayer with water and practice on a piece of clear and dry soil. Note how uneven this spraying is. Practice how to hold the spray lance while walking at a comfortable pace. 29
