Do you have sawdust? Only mucus? If sawdust powder shows that Cerambycidae larvae are eating xylem, and the bitten part is infected with bacteria due to trauma, and the mucus is a bacterial metabolite, you can first kill Cerambycidae larvae with pesticides, or you can stretch fine wire along the hole to kill insects in the trunk, and then kill bacteria with fungicides. First scrape off the sticky substance with a knife, and then apply the disinfectant to the wound and its vicinity. General fungicides: thiophanate-methyl, carbendazim, ray Domil, etc.