Hello out there all you arborist, my name is Kevin and I live in Lancaster California. We are located about 70 miles Northeast of Los Angeles in the high desert. We have a large weeping willow in our front yard about 35 ft in height and it seems to have a problem. It has a large gaping hole in its side about two feet in height and about 5 in wide and 5 in deep. I don't see anything crawling around in there. I took some pictures of it. Just wondered if it's some sort of beetle infection or what it might be and possibly how to cure it.