Just wanted to let folks know that I was in a field yesterday that had quite a few rust mites. It was up to our treatment threshold of 80% incidence and at least 8 mites per needle on one shoot. The most I saw was 25 mites on a single needle. So, it's not too early to get out there and look for rust mites.
I haven't seen my first twig aphid hatched out yet, but I'm sure they have started to hatch. Really, there aren't many fields that have much twig aphid in them. You might have to pull of 10 to 15 shoots before you find an aphid egg. Don't be fooled, though. That slight number is still enough to cause damage if we get a warm, dry spring. Of course, we haven't so far, so we might do well with twig aphids this year.