The economically valuable excretory product of coniferous trees is/are:
Cork
Resins and Gums
Coniferous trees excrete waste products such as resins and gums which have high economic value. Resins are valued for their chemical properties and associated uses such as the production of varnishes, adhesives and food glazing agents. They are also prized as an important source of raw material for organic synthesis and provide constituents for incense and perfumes.