THE FACTORS THAT ARE IMPORTANT IN LIFE SYSTEMS OF THE GYPSY MOTH

A scientific report
G.I.Vasechko, 2001,

Summary:

The analysis of literature and data of the author's experiments suggest that the composition of the factors suppressing the gypsy moth (GM), Porthetria dispar (L.), Lepidoptera, Lymantriidae varies depending on environmental conditions. For characteristic of this composition, it has been proposed to use the concept of the life system (LS) according to L.R.Clark et al. (1967). LS of GM is considered to be a result of interaction between its species potential (i.e. species' traits protecting from factors of mortality) and components of ecosystem stability. The latter include factors of ecosystem stability and their prerequisites - obligatory conditions of efficiency of these factors. The environmental conditions, for which LSes have been described, are classified in point of the following principles: 1) the type of host-tree resistance - tolerance or antibiosis, 2) the zone of the GM range according to W.C.Cook (1929), 3) the level of ecosystem stability to GM according to A.I.Il'insky (1959), 4) special cases. It has been described LSes of GM for a number of combinations of the above categories in Eurasia and North America. On the ground of composition of these LSes, it has been proposed measures for suppressing this pest insect. They turn on promoting all the natural enemies of GM and increasing vigor of its host-trees. There exist a possibility to establish forest stands with a significant level of stability to GM. Such stands promise to be useful for providing mankind with abundant forest production and for protection of the environment.

Review data:
2002 year
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