Features of forecasting of leaf-eating insects distribution in the forests of Zhytomyr Polissia

Foliage damage by leaf-eating insects during mass reproduction causes deterioration of the sanitary state forest and a decrease in its increment. Timely detection pest foci allows reducing cost their elimination preventing negative consequences for stands. The purpose this study was to identify species composition on territory State Enterprise Zhytomyrske Forestry subcompartments with greatest threat development dominant – Tortrix viridana, taking into account site conditions stand structure. During feeding period, identified, after end oviposition, density viridana egg masses assessed tree branches selected different conditions, age, relative crop density, proportion oak composition. database inventory (Ukrderzhlisproekt) score assessment preferences stands were used. Eleven from order Lepidoptera including 9 family Tortricidae, which dominated. highest fresh dubrava (D2 ), pure plantations aged 40-80 years low density. average preference (2.93 2.88 seed coppice forest, respectively), age (3.65), stocking (2.6), participation (3.3) Forestry. list very high an outbreak has been established. A survey these would allow timely population increase prevent