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Probably not what you want to hear, sprayers should really be washed out every time they have been used.
One of the data sheets for Holster says don't dispose to ground, treat as controlled waste, makes life difficult.
http://www.aitkens.co.uk/media/110645/holster_xl_msds.pdf
Many Thanks for your help
I'd have thought a few days.. but the longer it's left the more ineffective it will be. I'm not sure what% degradation you'll get. Are you spraying at max dose?
yes i am at full dose. i have reduced the size of the sprayer right down to the cooper peglar 8lti which helps, just trying to cut down on the wastage.
Many thanks
Ham
I've had some "mixed up" in a 20l knapsack for a couple of weeks with no problems............. if you're doing a lot of small lawns it's very handy. I don't honestly see why it should "degrade" as the concentrate is mixed in water anyway but if you find it's not working as well as well, just don't do it.
Thanks, there is one thing the smell is exactly the same after 1 ,2 or 3 weeks just as nasty . Another experiment on my own lawn coming i suppose.
Ham
When herbicides are mixed the excess calcium & magnesium that makes water 'hard'- bonds chemically with the active ingredient making it inert. This can affect approx. 20% strength of the herbicide immediately with a decrease in strength the longer it is kept in dilute form. Its certainly recommended to use a water conditioner/ buffer/ acidifier with glyphosate and common water based herbicides (not emulsions). Also, if its in there a long time, its going to be essential to use a tank cleaner afterwards or gummy deposits will form in the tank 'hot-spots' - potentially contaminating the next mix used in the tank....All Clear Extra or Tank Cleaner granules available..
Thanks for the info Progreen, I live in a hard water area - would rainwater work better for glyphosate ? Thanks, Russ.
Good advice from Progreen.
I would also say that you are bettter off mixing up just what you need for the area to be treated. With some calibration, you can easily work out for instanc ehow many square metres 5L of water/Holster will cover, for instance. It also means you mitigate having a tank filled with excess liquid. Personally I would not want to re-use the following day as it's key for my business to get the max benefit and effect from a selective herbicide treatment first time. Saves going back at extra cost plus a disatisfied customer :).
Again, advice would be to mix as needed, as they degrade overnight, plus it's bad practice to leave in sprayer as you'll not always remember what went in.
Cooper Pegler do a small hand held 1.25L spot sprayer; this is fine to use for smaller situations. That together with your 8L one should see you OK for most situations in terms on minimising wastage.
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