Sikura A. The fall webworm (Hyphantria cunea Drury) and factors of limitation its quantity in Transcarpathian region

Object of research: fall webworm (Hyphantria cunea Drury)The purpose of work: to explore biology of development, distributions and long-term dynamics of quantity of populations fall webworm which limit his quantity in Transcarpathian region.Methods: laboratory and field experiments. Analysis of influencing of meteorological factors and sun activity on development, distribution and quantity of the fall webworm. Research of activity of the entomophagesfall webworm. Microscopic researches of death rate of caterpillars from entomopathogens microorganisms.Research of pathogenic action of virus of a smallpox of insects (Entomopoxvirus sp.) relative to the fall webworm.Theoretical and practical results: Middle long-term phenodates and specified sum effective temperature it is necessary to use in an annual prognosis and signaling of terms of appearance and duration of development of separate stages of wrecker. Agroclimatology districts of Transcarpathian region on the amount of possible generations of the fallwebworm must be used for organization of measures on the inspection and exposure of wrecker. For prognostication of phases of dynamics of populations of the fall webworm next year or season, it is necessary to use sum effective temperature, hydrothermal coefficient amount of precipitations, indexes of mass of pupas of the second generation before wintering and fecundity of females. The virus of pox of insects can be used in development of complex poliviral preparation for adjusting of quantity of wrecker. Can be drawn on results of researches in the system of quarantine and protective measures against the fall webworm.Scientific novelty: First for the fall webworm stability of averaging long-term is set phenodates. It is set that in foothill and mountain belts by a basic limiting factor, distribution of wrecker is lack of thermal resources. Districts of territory of region is conducted on the amount of possible generations of the fall webworm and accordance to their areas of distribution of wrecker in Transcarpathian region. A recurrence in the dynamics of quantity of population of the fall webworm is set. Communication between the cycles of dynamics of population of and cycles of solar activity is exposed. Negative influence of extreme weather terms on the quantity of populations of the fall webworm is set. The general scientific picture of intercommunication is complemented between the such physiological indexes of wrecker, as mass of wintering pupas, fecundity of females and phases of dynamics of his populations. It is set that reproduction of the fall webworm in the Pannonian lowland in Transcarpathian region on a border with a foothill belt is limited not only to the climatic features, and complex of biotic factors, including him entomophages. First at the fall webworm a new exciter of viral disease is exposed is virus of smallpox of insects (Entomopoxvirus sp.) and some his biological features are explored. The basic results of researches are introduced into the proactive of crop production. Sector of use:agriculture.