Why do the directions for the Lawn Grub Killer 500 and Grubkil 500 say 12mL per 100 square metres, and then say to apply that in 10-20L of water, not an exact amount?
The actual coverage of the 12mL per 100 square metres is more important than the amount of water used to achieve this coverage. If you have a sprayer that delivers a very fine spray then you can achieve the coverage required with less volume of water than if you use a coarse sprayer. When a watering can is used, more water is required because a watering can will not give the same coverage as a spray.
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