Spray frequency vs . challenging weather question
I need to be getting a spray on for CM and will be using Triazicide. I think there's a decent chance of my tree getting rained on as we've been getting sporadic afternoon showers.
The label limits you to five post-petal fall sprays/season. Is it legitimate to count two sprays as one if they occur "close enough" together? And what constitutes "close enough"? I am thinking of spraying on this coming Saturday and Tuesday.
Corollary question: how long can you allow mixed spray to stand in the sprayer before it begins to lose its efficacy?