More people should know this and more people should be talking about this instead of debating it. It's a fact. Read the label, do even the most cursory research on it and I guarantee that you will learn what is known--single-mode action 'cides can easily force pathogens to become resistant. Therefore, it is highly important that people who regularly battle PM know and understand that they MUST incorporate other methods of control, especially those that use physical barriers and multi-site modes of action against the fungi.
Don't believe me? Read it for yourself.
That's a single-site mode of action. But wait, there's more, and it's not that hard to find.
Maybe I should put up a poll to find out how many people
don't know this, yet are using this product rather freely (read: carelessly). Naw, maybe the responses I get will be enough.
Before someone pops in and says that the label doesn't say it will make resistant powdery mildew, please, let me put your mind at ease here--PM is fungi, and there are
many species of the PM fungi. Therefore, the label needs to be more broad in its discussion.
But wait, there's more evidence that speaks to the real truth of the matter.
http://vegetablemdonline.ppath.cornell.edu/NewsArticles/Cuc_Cntct_Fcides.htm
Just tell me more evidence is needed, I'll find it.