I agree also. I tend to think that is NOT from CRW chewing silk. That appears to be just poor pollination. Apparently the "refuge" corn is a different number/family than your triple stack & didn't handle the year so well. Back when we used to have CRW damage annually, both to the roots & the silks, you could find 5+ beetles chewing on the silks & there would literally be a pile of silks on the ground & the silks would be chewed to the husks. I think the U of IL used to tell us that if we could maintain at least 1/2" of silk, the pollination would be OK. Looked like a barber shop of silk on the ground though. You still could end up with acceptable yields from the silk chewing. However, damage from the larvae chewing the roots was the catastrophe. Unless all of your refuge rows are goosenecked (don't look like they are in photo), then you sure don't have much root damage either. Dig a few up & compare to the triple stack roots. I'm sure you also realize that once pollination occurs, the silk no longer elongates (grows).

 Maybe you've answered this already in this thread (just started to read it), but do you care to say what numbers of corn those are that you picture? Again, I'm suggesting just poor pollination and not due to any bugs.