One of the Palo Verde trees on our property was suffering from root poisoning according to our neighbor, Tim. Apparently, an adjacent cats paw tree was emitting something into the soil that was slowly killing the big tree next to it. If you click on the image to enlarge, you can see one of the crew standing under the diseased tree. Note how some of the green wood on that tree has turned brown.
The tree is now gone, thanks to the landscape guys who took it and the adjacent cats paw down. Click here to see the after photo.