In the last two weeks I have been asked one thing constantly.
Is it too cold to spray?
Well if we are below zero every night then yes. I know that this is a problem right now but we also have to look at what we are trying to get rid of.
When it comes to perennials like a dandelion then we have to use the rule of thumb “if it is below zero then we need two days of plus 10 or greater before we can spray”. What happens is we get some minus temperatures then we get a real nice day and of course when it is nice there is no wind. So what do we do, we jump in the sprayer and start spraying like crazy to catch up. Now with the products like PrePass and Express Pro that have residual we think that they will be our saving grace or silver bullet but remember if the plant is not actively growing you are putting all of your eggs in one basket. What I mean is that if the plant is growing you are getting two modes of death. Through the leaves and absorbing through the roots. If it is not active then you are hoping that you will kill the plant by roots. With annuals and volunteer canola that will work to some degree but with things like dandelions and narrow leaf hawks beard that could be a wreck waiting to happen. So my advise is to wait till we get away from freezing at night and do the proper spraying job the first time We know what happens when we don’t get a good kill on those weeds because it tends to bite us in the you know what and costs us more money to get rid of a simple problem.
Those are my thoughts,
Garth Donald C.C.A.