Early signs of fireblight on apple blossoms?
I was taking a look at some of my apple trees, currently in full bloom (is cold up here ;-) and noticed something which gave me a scare. A few of the spurs had their flower bud all brown and dead. In a couple of cases there were also some yellow on the nearby leaves by the flower buds. It appeared to be unopened flowers that had turned brown and dried up.
This isn't the classic sign of fireblight I don't think, and I suppose a few dead buds might have happened naturally from other causes (although we have not had any near freezing temps in a while). And I have not noticed any other signs of FB on the trees. (I did spray a week ago just before blossom open with Serenade).
Should I pull out the streptomycin, or am I jumping the gun here?