weed killer

Dermot2468

just got a big 5 litre bottle of agricultural roundup to for the drive and of course there is n o instructions for mixing with a watering can it says that the whole bottle will do 12.6 acres with a sprayer, so can any one guess how much would be needed for a 10l watering can, any help appreciated

squire1

200ml per gallon as far as I know. You could put a bit extra in to be sure but it's strong stuff. You'll be a long time using up your 5Lt:D

Irish Gardener

Hello Dermot2468.
If its "Roundup Biactive", you will need approx 150ml of herbicide to 10 litres of water.
I suggest using a knapsack sprayer rater than a watering can, the can is very wasteful of the herbicide.

squire1

Oops, I put it on a bit strong so. Two weeks since application and everything is dead, so job done.;)

I'll second what Irish Gardener says about using a knapsack sprayer. Much easier to get an even application. You can hire them for a few quid a day if you dont have one.

Dermot2468

ye i know ill try to get a knapsack sprayer the 5litre bottles work out much better value at 86euro that those stupid one to a watering can sachets

CJhaughey

Don't forget to wear a mask that stuff is way toxic!
and not one of those el cheapo white dusk masks either, the real mccoy disposable filter job will do just fine.

gramlab

Have 25 lt knapsack sprayers in atlantic homecare (miura). About 45 quid - work a treat

Dermot2468

funds are a little low so i got a hand held pump one for 12 euro i figure it should do the same job