Looking for some help with my future potatoes.

1. Last year for the first time I got hit with blight. I saved my taters with Daconil but is there any way to get read of this fungus now or am I stuck with it? If I rototill my garden right now when it is still cold and freezing at times will it help any?


2. My potatoes are kind of smallish even though plant itself grows nicely and there are a lot of those smallish potatoes. I am not expecting store size ones since I do not use chemicals (other then Daconil) but still… is there a way to make them happier and grow bigger? I have good soil, Everything grows well but it is kind of heavy, sticky. I noticed that potato fields north of where I live have looser, lighter soil. Do I need to make my soil softer somehow? Is yes, how?

Any help is greatly appreciated.