Here is a followup on Cooper1 and Cooper2 trees in Greenhorn Creek. We see some interesting changes. The Cooper1 tree, despite its decline is showing regrowth from the base. The third picture shows Cooper2, at the location of the branch with foamy bark canker, and it is showing good growth. Cooper2, in general, continues to decline, as does the adjacent oak, which we have not yet investigated.
Photos by Paul Cooper, 31 May 2107.
A survey of buckeyes along Parrotts Ferry Road, as it heads down the canyon, also show that the buckeyes are experiencing a sort of leaf and branch dieback. Photos 27 May 2017.
See also the post on the Stockton Road buckeyes, showing the same ailment.
Click to enlarge.
These images show the buckeyes along Stockton Road, across from Save Mart, in Sonora. They too show the spotty dieback of whole branches, and the apparent leaf fungus problems. 27 May 2017.
Common eumenid wasps are beneficial, as they hunt oakworms, saving our oak trees from defoliation. But people still do not like them in their homes. Here is a video showing the wasps, unable to re-enter the wall voids, after we caulked the entry points. Each of these wasps is carrying an oakworm. The white caulk will dry clear. Columbia California, 23 May 2017.