Насекомые-филлофаги ранневесеннего комплекса в дубравах лесостепи: очаги массового размножения, прогноз дефолиации, роль в ослаблении и усыхании дуба

Abstract

The article is devoted to the problems of existence of the outbreak locuses of the phillophagous insects of the early spring complex in the upland oak forests of the East Forest-Steppe zone of Ukraine (Kharkov region) and their influence on condition of the common oak of the early form. During the research, the analysis of the dynamic process of the oak stands defoliation by phillophagous insects, the complex analysis of the phillophagous insects influence on the active periphery of the crown, the annual radial increment and the annual mortality of common oak trees of the early form have been carried out. The degree and the character of this influence have been determined. It has been shown that phillophagous insects are the main direct cause of worsening of condition and decline of the common oak of the early form in the upland oak forests. The mathematical model of forecasting oak stands defoliation by phillophagous insects has been proposed.