Earlier this year as growth hardened off on two ponderosa pines, I noticed that a few of this year's needles were yellowing, browning and falling out of their sheaths. I've gone back today to the locations and pressed on some of the buds and found out that while they looked nice, they were hollowed out. I opened up a few of them and found these. Any idea what they are and how to treat?
September 17, 2020:
August 18, 2020 on ponderosa 2:
July 18, 2020 on ponderosa 1: