Lime sulfur is a chemical substance that has various applications for bonsai. It can be used to preserve and bleach the deadwood areas of a bonsai, such as jin or shari, giving them a white and aged look. It can also be used as an insecticide or fungicide to control pests and diseases that may affect the bonsai. Lime sulfur should be applied carefully, as it has a strong smell and can cause irritation to the skin and eyes. It should be diluted with water and sprayed or brushed on the bonsai, avoiding contact with the living parts of the tree or the soil.