Anatomic-morphological regularities in the reaction of Pinus sibirica du Tour, Picea obovata Ledeb., Abies sibirica Ledeb., Pinus sylvestris L. to the crown defoliation by Dendrolimus superans sibiricus Tschetv

The new regularities in the response reaction of the main coniferous tree species xylem on their defoliation by Siberian silkworm are found and successfully tested to identify the periods of the leaf-eating insect mass reproduction in retrospection.