Abstract: For the purpose of estimating the stability of 2-year-old sprouts of Larix decidua Mill, Pinus silvestris L., Quercus robur L., Betula verrucosa Ehrn., fumi-gory method was used. Influence of fumigation by acetone, formaldehyde and styrene evaporation on macro-and microelement content in leaves and needles of the plants under consideration was studied. Organic toxicant influence on membrane penetration and thus on magnesium and calcium, iron and zinc coming out from leaves and needles was studied. It was investigated that toxicant influence resulted in decrease of macro-and microelement content at the expense of increase of membrane penetration. Toxicants under study proved styrene to be more powerful than formaldehyde and acetone. After comparison of fumigation reaction of wood plant sprouts Larix decidua was found to have less toxicant stability and Pinus silvestris L. the most toxicant stability. The biological method used in the experiment is an express method that makes an opportunity of obtaining formation about metabolic process under the influence of industrial organic gas waste of high toxication and concentration. It makes possible to show biological indicator of a certain pollutant on wood plants.