How to protect the wound after ring-barking a jujube tree?

After ring-barking a jujube tree, pests often bore into and feed on the tender callus tissue, so the wound cannot heal for a long time and the tree's recovery of vigor is affected. 15 to 20 days after ring-barking, apply a 400-fold dilution of dimethoate plus 0.2% sulfur powder to the cut, then seal it with wet mud; this can kill insects and sterilize the wound, and helps the wound heal.