Effect of the distance from plots planted with trees and bushes of various species on the number of foliophagous insects in pine stands

摘要

The effect of the distance from pltos planted with various species of trees and bushes on the number of Sphinx pinastri pupas and cocoons of Diprioninae in the forest litter of pine stands was studied. It was show that That there is no ground for maintaining that the number of pupas and cocoons of these insects depends on the Distance from plots.