Question
I have a globe willow that is oozing a white puss in several places on the trunk.  After looking further, there are bugs like larva in some areas of the puss.  If I spray for the bugs will this cure my problem or is there a deeper problem than the bugs?  What would have caused this?

Answer
I think what you are discribing is a disease called Frothy Flux. It is the result of a yeast or other saprophytic or secondary organism that invades the tree through a wound, causing the fermentation of the plant tissue. In your case there is also a borer , an insect causing some of the problem. For the borer check with your local garden/ nursery type store and get an insecicide for borers. This sprayed on the bark will solve the borer attack. This may also be the cause of the frothy flux allowing an entry point for the condition. The recomendation for frothy flux is keeping the tree healthy. Here is a web link that discribes frothy flux and the borer and gives recomendation for control.  http://www.coopext.colostate.edu/TRA/PLANTS/index.html#http://www.coopext.colost...