Because the higher leaves seem to be outgrowing the damage, my guess is alternaria fungus, which is encouraged by warm, damp weather. Dry conditions will help prevent it, so I'd get rid of the vegetation near the base of your plants and use a clean mulch like straw or sawdust to reduce splashing onto the leaves.

Here is a link that might be useful: blueberry alternaria

thank you, planatus.
I don't have vegetation near the base, it was mulched with compost. I'll mulch with straw and wait.

Should i remove bad leaves?

Temps are warmer and air drier now than when the outbreak seems to have occurred, so there should be little risk to leaving the leaves in place. They're not doing much good in that condition, though, and snipping them out with a small pair of scissors will reduce inoculum in environment, which would be nice in the event you get another run of rainy weather.

If it were me, I'd clean the plant up some now, then wait for the fruit to ripen, and then give it a makeover with trimming, organic fertilizer, more mulch and water.

Red spots can be a sign of lack of nitrogen, you may need to fertilize with high nitrogen fertilizer. This can be a great time to use ammonium sulfate. Too much and you may kill the plant. Be careful not to over fertilize. You can start with 1/2 tablespoon and then add an additional 1/2 tablespoon, up to 4 tablespoons. When trying to get rid of red spots whatever you do add the fertilizer slowly and watch results to be sure you do not kill the plant. Here is a site that may be helpful http://www.blueberrycroft.com/cms/index.php?option=com_content&view=article&id=80&Itemid=105.

Here is a link that might be useful: Blueberry croft

Thank you, people.
I don't think that this is nitrogen issue. I did not have yellowing of older leaves. I had applied my compost in spring and UCG around the plant. Should be sufficient for this bush.
I'll clean it a little bit tomorrow (hoping for good weather looking out of the window on rainy morning).

I have a problem with mine. The tips of the new growth are a pretty yellow/red color. I'm guessing this is a lack of iron. I'm going to try and add a picture to this. A while back, I used some miracle grow and the plants responded well with new leaves. Then the leave tips began to burn, so no more miracle grow for my bb bushes.

{{gwi:107317}}

{{gwi:107319}}

{{gwi:107320}}

Is that a burned area around your blueberry plant? If so, ashes will make the soil more alkaline and that wouldn't be good for blueberries from what I've been reading.

noss