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To calculate dosage accurately what is your spray width and actual square metreage of lawn of lawn to be treated. Relay is applied at 5L/Ha in 200+ litres of water your figures suggest you are spraying at 500 litres per hectare worth checking that your sprayer is delivering that amount as must be very coarse spray, my sprayer chucks out more like 2 litres per 100sq metres .
I am assuming you have your spraying certificates.
Yes have spraying certificates, but has been a while since had to do any working out.
The sprayer is at 3 bar and using a yellow 02 nozzle. Its def coming out at that rate.
Sorry Lawnman. You made me question myself. Your right! mines putting out 1L per 50 sqm, Ive just checked. so I should use 375ml per 15L with my caculations at the right rate. Thats more like what I expected to use. I can work out how much once Ive checked out the lawn size.
Thankyou for your advice so far!
You shouldn't be spraying at 3 bar; 1 bar for herbicides.
I use 50ml relay to 2.5l water per 100m2 grass. Green deflector nozzle (can't remember flow rate but it's the one most of us use).
Why are you only using 1bar. What is the pattern like? I wouldnt use any more than 3 bar, i find that theres no spray bounce and just got to make sure that theres no drift.
My info from my PA1 /6 says that pressure is dependant on conditions and the chemical application guidance notes.
Thank you Jez for you advice.