Q: My fruitless mulberry tree has these webs all over some of the branches and the leaves are being eaten, is this some kind of spider and what can I do for it?
A: No that is not a spider, those are the webs of a caterpillar called Web worms or Tent Caterpillars. They like mulberry trees and pecan trees in particular. Treat with a good general insect control spray or a biological spray containing BT or bacillus thurengensis. If reaching the pests to spray is a problem, they are not a serious threat to the health of the tree, they will make it look bad but will not kill it.